Lexus RX400H News

The safety recall is to fix electrical and mechanical defects that could cause the vehicles to either stall while being driven, or to go into 'limp home' mode, where they can be driven only at designated lower speeds.The 2006-2008 Lexus RX 400h is being recalled for a problem in the car's hybrid system that could see solder on transistors become heat damaged -- particularly under high load or when towing -- activating warning lights and shutting down the system, causing the vehicle to either go into 'limp home' mode or shut down altogether. The Australian portion of the recall will affect about 1750 Lexus RX400h vehicles built from June 2006 to December 2008. Lexus said there had been no incidents related to the issue reported in Australia, but cautioned care while driving. "Motorists can continue to drive their vehicle, however are advised to avoid towing, or rapid acceleration until the vehicle has been inspected," Lexus spokesperson Beck Angel said. "Motorists are advised to stop driving and contact their preferred Lexus dealer if the engine warning lights illuminate."More than 100,000 Lexus IS 350, IS 350C and GS 350 vehicles from 2006-2011 are also being recalled for a defect in which bolts securing the variable valve timing control device may work loose, causing the vehicle to stop. Lexus has alerted owners that an abnormal noise in the vehicles may show early symptoms of the defect. Affected customers will be notified of the recall by mail at their last known address and asked to make an appointment at their preferred Lexus dealer, where affected parts will be replaced. For further information about the recall, customers can call the Lexus Customer Assistance Centre on 1800 023 009.

To be eligible for 4WD Of The Year, a vehicle has to be completely new that year, or significantly revised. By 'significantly revised' we mean a major mechanical change like a new engine or drivetrain, or a new body. Styling, equipment or interior facelifts don't cut the mustard.To be eligible, the vehicle in question also has to have a full-size spare wheel either as standard, or available as an option. No full-size spare equals no start. On this count, the Peugeot 4007, Volvo XC60, Audi Q5 and Mitsubishi Outlander were all eliminated automatically.That left a number of other soft-roaders that do come with a full-size spare to consider. These included the Kia Sorento, Hyundai Santa Fe, Lexus RX350, Lexus RX400h and the Nissan Murano. The fact that so many new soft roaders didn't go down the space-saver route is good news but at the end of the day they are still soft roaders and with so many strong candidates among the ranks of the serious 4WDs, we couldn't warrant their inclusion.The new 'serious' 4WDs included the Prado 150 Series, the Land Rover Discovery 4, the Range Rover Sport and Vogue, the new Land Rover Defender variants, the ML Series Triton, and the revised Jeep Wrangler.   Further culling of the numbers saw the Wrangler and the Defender eliminated on the grounds that they are both variations on well-known themes while the Range Rover Vogue, with its new petrol 5.0-litre V8, was deemed to be too expensive in relation to the new Range Rover Sport with its new 3.0-litre TDV6.In the end it came down to the Discovery 4 with its new TDV6 engine (in SE spec), the Range Rover Sport with the same engine (only one spec level), the top-spec ML Triton as this is the only model with all the new features as standard, and the Prado in both petrol and diesel guise. To us, these five vehicles represented an extremely strong field … a classic Land Rover verses Toyota battle with the wildcard Triton thrown in.Find out which vehicle won in Australia’s leading offroad magazine, Overlander, on sale Wednesday Jan 27.

"There are very few hard-core, dark-green environmentalists, but those who are strictly hybrid buyers," he said. "Dark greenies are very savvy about the product. Sometimes they even educate our salespeople. "They know that 90 per cent of our battery is recyclable and dispensed of properly. "Dark greens won't even look at diesel." However, he wouldn't rule out Lexus making a diesel hybrid in the future. "The good thing about our hybrid system is that it can be adapted to diesel," he said. Another attraction of hybrids was that the production process was becoming cheaper, making the vehicles more affordable. "The RX hybrid is the cheapest Lexus hybrid yet and represents excellent value for money," he said. "Diesel vehicle prices are going up, but hybrid prices are coming down." Roca said they needed an entry level hybrid to attract younger buyers but said the planned mid-sized HS250h hybrid sedan was not yet confirmed for Australia. "I don't know if it would be entry level either. It's more of an ES size. "But we do need an entry-level hybrid. "Our average hybrid owner is five years older than the equivalent petrol model buyer. "With the petrol RX the average age is 45, so the hybrid is about 50, but I think the average age will come down for the RX400h mainly because of the more affordable price." Roca said he hoped other manufacturers would turn to hybrid technology. "I can't wait for others to go hybrid because then we won't have to educate the market on our own," he said.

Thanks to combined fuel economy less than seven litres per 100km, the new RX is the first hybrid to qualify for partial exemption on the luxury car tax which means a saving to buyers of about $4000.Lexus Australia boss John Roca said the price reduction was not only due to luxury tax exemptions up to $75,000 of the price but also more efficient hybrid technology production.Buyers of the base model Prestige will pay a recommended retail price of $89,990, which is $8000 below the previous model RX400h, even though it comes with more features such as smart start, a 12-speaker sound system and remote touch computer system.“It (hybrids) will continue to become more affordable as hybrid technology progresses,” Roca said.RX hybrid was the cheapest Lexus hybrid yet and represented excellent value for money, he said.Lexus has three months of orders already even though buyers were not aware of the final price.“Dealers have been assuming that the price would go about $10,000 on the previous model,” Roca said.The RX450h comes in three trim levels, mirroring the RX350 launched in February: the Prestige, the Sports ($96,900) and the Sports Luxury ($107,900).Roca said they expected to sell 60 a month which was a 70 per cent increase on the RX400h and would represent 30 per cent of all RX sales.The new RX hybrid is 10 per cent more powerful than the RX400h with a combined peak power output of 220kW and 23 per cent more efficient with economy of 6.4L/100km and CO2 emissions of 150g/km.It also has a bigger footprint on the road with a wider track and wheelbase.The RX450h will be available in the market from July 13.

What should have been the main attraction in the car world was reduced to a sideshow as the heads of America's Big Three sat down in Detroit on the same day to beg for the billions they need to stay in business.There was plenty of shiny new stuff but all the talk was doom and gloom, even from car chiefs who do not have the same live-or-die pressures as General Motors, Ford and Chrysler."I think it is fair to say this is the worst we have seen," the head of the world's fifth-largest carmaker, Carlos Ghosn of the Nissan- Renault alliance, says as he delivers the keynote speech at the opening of LA '08."And we are not certain. Is this the beginning of the end, or the end of the beginning?", Ghosn says of the critical cash crisis which is affecting nearly everyone in the car world.Still, there is plenty of new stuff and news on the strangely subdued stands in downtown LA.The latest Ford Mustang, for a start.And then the world debut of the latest Mazda3 and Lexus RX, the great looking new Nissan 370Z, the updated Porsche Cayman and Boxster, and even a droptop Lamborghini Gallardo LP 560-4.It's no surprise, either, that some of the special impact in LA is reserved for cars which are chasing the elusive path to a future beyond petrol that satisfies American lawmakers' deepening desire for transport without emissions.The Mini E is the obvious champion, but LA also has the electric Mitsubishi i-MIEV which is likely to become Australia's first plug-and- go volt car, and all sorts of new-and-old battery-powered concept cars from the Big Three and a growing number of hybrid production cars including the Mondeo-sized Ford Fusion.As well as the radical looking Honda FC Sport Concept, which was done to prove that a hydrogen-powered future car does not have to look as boring or family as the company's upcoming Insight or the benchmark Toyota Prius.The show is a mis-hit for General Motors, which canned its concepts and parties, although Ford stays totally committed with a Mustang which makes the running for an event which typically draws around one million visitors in a city which is the car capital of the USA and, by extension, the world."I think there is a mixed emotion at the show," says J Mays (SUBS: CORRECT), the design director of Ford Motor Company."You still have to try and tug hard enough on the heart strings that people forget about the purse strings. It's a yin-and-yang situation."Looking over at his Mustang, and across to the Honda FC, Mays expresses what many people are thinking. Even at a time when it is more politically correct to attack the car chiefs, and their private- jet flights to Washington, than to talk about a show which takes another important step towards the world beyond petrol."Automobiles are escapism. It's not just transport," says Mays."People ask if it's appropriate to launch the Mustang at his time. Damn right it is. It puts a smile on your face and enhances your quality of life."That is definitely true of the Mustang, which still looks muscular and fresh despite a chassis which trails well behind the Ford Falcon, and the open-air Gallardo and even the second-generation Nissan Cube, which could just make it to Australia one day.And the 370Z looks tauter than today's 350, with the promise of more go and much better cabin quality, and the Mazda3 is fresh and happy.The Mini E looks just like the regular petrol-power car but is a milestone car which has the power and range to win people to electric."It's an important time in the history of the global car industry," says Carlos Ghosn.He worries about the impact of the global recession, and the money pressures on carmakers trying to evolve faster than ever before, and the challenges of safety and emission regulations.But, just like the cars on the LA Show stands, and the regular car people who flood in once the doors are open, he is bottom-line upbeat and bright."The one thing that is certain, absolutely certain, is that people will continue driving cars. Cars have no substitute. We have convergence on the issues, but divergence on the solutions," Ghosn says.And that is pretty much the way things looked in LA. 

Toyota Australia is planning to build a hybrid version of its family-sized Camry or Aurion and have it on sale within four years.Toyota's head of sales and marketing, Dave Buttner says one will get the hybrid petrol-battery system.Toyota sells three imported hybrids, the Prius, based on the Corolla; a Lexus prestige sedan, the GS450h; and all-wheel-drive wagon, the RX400h, while a V8 luxury saloon, the LS600hl is due later this year.The home-grown hybrid would be built on the same lines as the Camry and Aurion at Toyota's Altona plant.“We want to be the first local manufacturer with green credentials. We want to be known as the company that was first to market,” Buttner says. “We want to be the leader on this issue. We have been looking at the Camry and Aurion for the hybrid and it's looking like the Aurion. It will go on sale in 2011 or 2012.”Toyota has been encouraged by the take-up rate of its hybrid Prius.“When launched, 3 per cent of sales went to private buyers, now it's 39 per cent,” Buttner says."Demand for our Lexus hybrids is double (our) expectations."  

Experts say hybrid-engine technology could be available in the Holden Commodore sooner than we think. Recent important developments include:- General Motors in the US announcing it has put a hold on future rear-wheel-drive planning while moving ahead with development of hybrid and electric strategies for its global brands that include GM Holden;- GM Holden confirming it is working on a diesel option for Commodore;- A leading manufacturing expert warning Australian carmakers at a key conference this week they need to expand their focus to smaller and greener cars to survive;- Most overseas car companies expanding their development into alternate-powered cars;- The European Commission unveiling a strategy to make car companies cut carbon dioxide emissions in all new vehicles by 2012, and;- The US Supreme Court ruling that carbon dioxide emissions from cars are subject to the same tough standards as other emissions.GM vice-chairman Bob Lutz says the company is putting a hold on rear-wheel drive projects. “We've pushed the pause button. It's no longer full-speed ahead,” he says.Two of the most important RWD cars in the works are the Chevy Camaro sports coupe, due back late in 2008, and the full-size, RWD replacement for the Chevy Impala sedan for 2009. Both are expected to be huge sellers in the US and contribute profits to GM, which is still burdened by financial woes.“It's too late to stop Camaro, but anything after that is questionable or on the bubble,” Lutz says.The RWD cars will be larger and heavier than front-wheel-drive cars so it comes down to the matter of fuel economy. Or, as Lutz says: “We don't know how to get 30 per cent better mileage (from RWD cars).”That 30 per cent bogey arises from a proposal by the US Government to raise corporate average fuel economy standards by 4 per cent a year so cars will have to average 34mpg (6.9L/100km) by 2017, up from 27.5mpg (8.5L/100km) today. On top of that, the Supreme Court ruled last week that the Environmental Protection Agency can regulate carbon dioxide expelled by cars, a gas that contributes to global warming. The EPA doesn't do so now.GM Holden boss Denny Mooney has confirmed development for a possible diesel option for Commodore but denies a bespoke hybrid development for Holden.Following reports this week that Holden engineers were working on a hybrid system, the company says the development engineering is a GM global program based in North America, driven by a joint venture with DaimlerChrysler and BMW.“We're (GM) doing engineering work on a two-mode hybrid,” Mooney says. “It's our joint venture with DaimlerChrysler and BMW.”Mooney says the expense of hybrid development puts it outside the capacity of individual brands within GM but a global GM hybrid or electric strategy could flow to Australia.Holden has dabbled in hybrid and electric technology with the ECOmmodore which highlighted the use of supercapacitors and lead acid batteries. The work, a joint venture with the CSIRO, centred mainly on maximising stored electric power.In Melbourne this week a leading manufacturing expert and director of the US Centre for Automotive Research, Jay Baron, urged local makers to embrace change.He told the Society of Automotive Engineers conference any failure to reflect the needs of a rapidly changing global market was risky.Although supportive of Australia's carmaking business and its export efforts of both cars and intellectual property, he believes hybrids and smaller cars represent the new growth areas for the next 10 years.Baron was also surprised Australia, with a market of less than one million new cars a year, could sustain four major car manufacturers.“A state-of-the-art high-volume manufacturing plant today has to produce somewhere over 200,000 cars a year,” he says.Locally, Ford, GM Holden, Toyota and Mitsubishi are well under this figure. “If you're not producing that volume, then you are a scaled-down niche plant and being in a niche market right now is risky,” he says.“Rear-wheel drive cars are slowly becoming niche markets. In Australia the question is: Are there enough niche markets out there so that you can supply the world with rear-wheel drive cars?“It's a little bit of a risky future not to be looking at where the growth is and the growth is small, efficient cars and new technologies.“There is a whole family of hybrids coming out that could totally change the market again as they slowly scale up.”The change in car buying values and habits is part of a broader cultural shift in the industry.“In North America we're moving away from sports utility vehicles to CUVs — crossover utility vehicles — and higher mileage vehicles,” he says. “In Australia you're transitioning from rear-wheel drive to small front-wheel drive cars, which tend to be more imported.“So you're experiencing similar problems to those we're having.”Baron was the keynote speaker at the conference, which also featured Holden's executive director of engineering, Tony Hyde, Toyota's vice-president of the Toyota Technical Centre in Melbourne, Max Gillard, and the design director of Ford Asia-Pacific, Scott Strong.Toyota spokesman, David Buttner says the company has no plans to produce smaller cars in Australia, but the development of future hybrids is an important factor for the company, “We are continuously evaluating the opportunities to introduce hybrids into Australia, we are working with all stakeholders including the government to facilitate this development,” he says.Ford spokeswoman, Sinead McAlary says the company is constantly examining ways to improve all aspects, such as fuel economy, but a complete shift in focus may not be possible.“To say the Australian industry should develop small cars or hybrids is not necessarily very practical,” she says. “The Australian market is also not ready for the Australian car industry to be producing hybrids.”McAlary says hybrids only accounted for around 3000 sales last year, which is less than the number of Falcons that Ford produces in one month.She says the technology is expensive and people have to be prepared to buy the vehicles, before manufacturers can change the way they operate. “The market has to be ready for it,” she says.And while car companies feed into the new technology that's already being developed in the US and Europe, McAlary says “our industry is too small for us to develop it by ourselves”.Toyota with the Prius, Honda with the Civic and Lexus with the RX440h and GS450h are the only three companies selling hybrids in Australia, but many manufacturers have displayed concept vehicles.One of the newest overseas manufacturers to create a hybrid is Proton, in collaboration with Lotus. Unveiled at the Geneva motor show, the Proton Gen.2 EVE hybrid concept has a claimed fuel economy figure of just 5.6L/100km — some 28 per cent better than the petrol road-going version. Proton has not revealed whether it is planning to mass-produce the hybrid.

Ten years.The average life expectancy of a Hybrid car. The average number of years it would take to break even in fuel savings after investing in a premium diesel engine.And the average number of years that some industry experts expect the current crop of petrol engines with manual transmissions to last before emissions standards render them useless.A sobering statistic, yes, but for years manufacturers have been working around the problem of emissions, pollutants, and waste to produce not only a cleaner, eco-friendly car, but one that does not compromise on performance, luxury or price.Though you would not know that this was the future of motoring from the empty green stands at this year’s show.The place to show off the future tech is, as always, the motor show stand, and this year saw an absence of previous shows’ futuristic displays of alternative fuels.However, there were some exciting models that are not simply concept, but close to, or in, production.Saab brought out its BioPower models, which are specifically designed to run up to 90 per cent ethanol - though the car can run on petrol if an ethanol pump cannot be found.Saab claims the use of ethanol as an environmentally friendly renewable fuel source with low emissions. And the green goodness produced by the crops such as sugar cane from which ethanol is produced can statistically counteract the resulting emissions from both the manufacturing process and the cars that use the fuel.Ethanol’s premium over petrol at the bowser is also supposedly negligible.While BioPower production cars were on display, the show is stolen by the Aero X concept that floored the floor at Geneva.Running a 2.8-litre, twin-turbocharged V6 engine and with a jet-fighter inspired design and cutaway cockpit (even the wheels look like propellors), the 100 per cent ethanol green machine claims no carbon emmissions while producing a supposed 4.9 second 0-100km/h sprint time (it is yet to be taken to a drag strip for official performance testing). Ethanol and performance?Theoretically, no problem…But the biggest selling production alternative is still the petrol-electric hybrid.Honda’s Civic Hybrid and Toyota’s Prius models have the market almost exclusively to themselves, but the luxury genre has entered the greenhouse with Lexus.Toyota has lent its technology to sister company Lexus this year with the GS450h, and more recently, the big RX400h SUV which sits atop the Lexus stand.This uses the combination of front and rear electric motors with a 3.3-litre V6 petrol engine to power the car.When accelerating, the systems work together to give the car a combined 200kW, and capturing the energy usually wasted during deceleration and braking to recharge the electric motor. So no cords or power points necessary.There is a catch - the estimated life of the battery in this type of hybrid is estimated at ten years.As no hybrid has been around that long (the Prius first hit the market in 1997), and Toyota has never replaced a hybrid’s battery as yet, we will have to wait until 2007to see whether we have power, Y2K, or the start of expensive battery replacements.And it will be in 2007that we slap eyes on Lexus’ (and the worlds’) first hybrid V8; the AWD LS600hL limo version of the petrol LS460 seen at this year’s show.Not to be outdone, BMW is scheduling a hydrogen duel-fuel V8 for 2008, which combines the company’s stalwart 4.4-litre petrol engine with liquid hydrogen fuel cells.It is being kept under wraps for the moment, and the fact that hydrogen would cost over $4 a litre here does not make for a clean start in Oz.But while some of this cool tech was never going to make it to Sydney, the anticipated concept-come-production-car, the Peugeot 307CC Hybride diesel, was due to be revealed – and wasn’t. Reliable technology? Hmmm.The 307CC Hybride is a cool concept. The combination of a diesel engine with an electric motor in the cool convertible produces a teeny fuel consumption figure of just 3.7L/100km.Unfortunately, like so many of the fantastic fuel alternative ideas and ideals, the tech is too expensive at present to make a production car viable, and its release is scheduled for 2010.Not to mention the fact that it missed the plane to Sydney from the Paris show, and we had to settle for the new 207 and a half-naked woman on the stand instead (yes, we are mentioning her again – but that particular model was a literal show-stopper).One thing is for sure: environmental concerns are weighing heavy on all car maker's strategic decisions for new models. But at this stage most are still not revealing their long term plans to deal with emissions and fuel efficiency.Who knows what kind of alternative fuels and cars will be on the market in ten years time? And will the old Prius be running, or running out of battery?Either way, it won’t be long before we are all driving with a smug, earth-saving smile of some sort on our faces.Hopefully, the future of green motoring will be cars like the Aero X…

It's hard sell, but Lexus thinks it can convince enough buyers to move into its new 400h. The 400h is the hybrid version of the RX350 and commands a $10,000 premium over the Sports Luxury petrol RX or a tick under $20,000 for the entry Sports RX. So the recommended retail of $94,100 is a fair sting for what is essentially a compact luxury SUV. Despite the cost drawbacks of wanting to go green Lexus says it has three months worth of orders and figures the 400h will account for about 20 per cent (1500 cars) of the RX volume in Australia next year. Since it first went on sale in the US in April last year 33,000 have been sold which accounts for 22 per cent of total RX sales. The 400h is based on the superseded 3.3-litre petrol engine which made way for the 3.5-litre RX350. Lexus says the new engine was unavailable for the world launch last year. The 400h joins Toyota's Prius and the Lexus GS450h sedan and Honda Civic hybrid as the list of petrol/electric vehicles grows in Australia. Next year Lexus will launch the world's first petrol/electric V8 hybrid, the LS600hL. So what are the benefits of having such an SUV wagon? Lower fuel consumption (8.1litres/100km), reasonable performance and vastly lower emissions (192grams/km) which on Lexus's figures is about 58 per cent of those of the nearest similar petrol engine. The hybrid incorporates three electric motors/generators while a compound planetary gear set in the transaxle acts as a power splitting device and electronically controlled continuously variable transmission to drive the front wheels. The front and rear main electric motors are used for normal starts and when more urge is required the third electric motor fires up the petrol engine which works in tandem with the other two electric motors. As in existing hybrid cars, the petrol engine switches off when the vehicle stops while the electric motors are ready for starts. Using the brakes makes the two main electric motors act as generators which help slow the vehicle down and send electric power to the battery. The Electronic Continously Variable Transmission is the essence of the hybrid which links the two 650-volt electric motor/generators and the petrol engine through the planetary gear set. Even the air-conditioning can be powered by electricity when the petrol engine is not functioning, as in stopping at traffic lights. The petrol V6 engine provides 155kW of power and 288Nm of torque while the main front electric motor generates 123kW and 333Nm. The rear electric motor is good for 50kW and 130Nm. The total system (petrol/electric) puts out 200kW with the petrol component driving the car and driving the third motor/generator to charge the battery. Lexus claim the 400h gives the luxury arm of Toyota a point of difference in the showroom. Already the Lexus GS450h powered by a mix of electric power and the 3.5-litre petrol engine is exceeding sales of the diesel BMW 530i and Jaguar S-Type turbo diesel. Lexus says the 400h has the advantage over diesels in that there is no mess at the bowser and there is no need for particulate filters. ON THE ROAD THERE are no compromises with the RX 400h something Lexus knows is vital to the market. Whereas there are compromises with diesel cars in terms of messy, smelly bowsers and soot filter replacement there is no such baggage with hybrids. About the only known hiccup is battery life. The 400h uses three electric motors and while there is no hard and fast evidence, Lexus says the life expectancy is more than 10 years. Lexus is unsure about battery life because it says it hasn't had to replace one. A replacement battery would be around $3000-$4000 but probably would be an issue for a used buyer. Inside the three-binnacle display remains except a power meter replace the tacho on the left. Surprisingly the 400h is a little soft on take off despite the factory claiming 7.6sec for 0-100km/h. There is not as much launch as one would anticipate particularly as take-off is powered by the electric motors which develop maximum torque at stall. And if you mash the accelerator everything starts to get a bit noisy, another surprise when Lexus is known for its refinement. On the drive in suburban Sydney and out to Camden in the south-west, the brake pedal felt a little soft and spongy, perhaps a result of the regenerative set-up of the stoppers. Once the 400h finds its legs and is up and running all is fine. The rolling performance is as good as any Lexus. The RX 400h shares a lot of kit with the RX 350 Sports Luxury version like 18-inch alloys, bluetooth, rear view camera and rear guide assist, touch-screen navigation and a fancy 11-speaker Mark Levinson sound system. What it gains over the RX 350 Sports Luxury is the VDiM (Vehicle Dynamics integrated Management System) which tells the rear electric motor to provide torque to the rear wheels to maintain stability, seat heaters up front, leather steering wheel instead of woodgrain and metallic trim on the shifter and surrounds as well as centre console. On the 70km launch drive with two up fuel consumption was 8.3-litres/100km from a best just below 8-litres to a touch over 8.5-litres. But fuel consumption is not the decisive factor in the buying decision. It is only a part of the picture, emissions and a machine which is seen to be a bit mean around town yet remains green is the essence of why people will ante up almost $100,000 for an electrified Lexus.

"We see it as a segment buster," Grant says. "It competes against nothing because there is nothing like it available."Lexus has dubbed the petrol-electric RX as a "luxury performance hybrid SUV", making it the second new hybrid model after the GS450h to sport a Lexus badge this year."Final specifications for the car are still under discussion but it will arrive as a true Lexus," Grant insists. "We always strive to get as much specification as possible in a simplistic model line-up at a realistic price point."While conceding some may see it as odd that the RX400h uses the old 3.3-litre V6 from the superceded RX330 rather than the all-new 3.5-litre from the new RX350, Grant says it is fully consistent with Lexus development policy."These sorts of product discussions are continuous," Grant says. "The next step in this line of hybrid development may be a larger petrol engine but just as easily it could be a smaller, more efficient petrol engine and a more powerful electric motor to increase power output."It is an open-ended discussion and really there is no set-in-stone policy direction."Rated a SULEV (Super Low Emissions Vehicle) in the US, the RX400h will carry a fuel economy rating for Australia of 8.1 litres per 100km, which is 3.0 litres per 100km more efficient than the all-petrol RX350.The technology is along the same development lines as the GS450h and the luxo-pack LS600h long wheelbase which will go on sale in Australia early next year. The main power source is the 3.3-litre DOHC V6 modified slightly from its RX330 incarnation to produce 155kW. That drive is enhanced by a bank of three electric motors which feed in extra drive when demanded by the car's ECUs.While the full available powers from petrol and electric sources — the 298kW (400hp) that the car is named for — are never available at the same time, the hybrid RX is rated at 200kW with the extra urge obvious at launch and when called on for overtaking.The power split from the electric motors is an additional 123kW to the front wheels from one motor and another 50kW to the rear wheels from a second.The third motor starts the petrol engine (which shuts down at stoplights), regulates the continuously variable transmission's ratios and generates electricity.When called on for maximum acceleration, the RX400h gets away from standstill with V8-like urgency. Lexus Australia claims it will put the 0-100km/h sprint behind in a creditable 7.9 seconds, although figures out of the US suggest closer to 7.3 seconds for the sprint.In common with other Toyota and Lexus hybrids the system collects energy from regenerative braking, storing the harvested electricity in the bank of nickel-metal-hydride batteries hidden away under the floor behind the rear seats.Acceleration is seamless, aided in no small part by the CVT which is in sharp contrast with the rather coarse note of the 3.3-litre engine.The dash layout is in keeping with other hybrids with engaging displays illustrating the ebb and flow of electric energy to and from the drive wheels. In place of a tachometer there is a largely-for-show power-usage display that can be effectively monitored only at the cost of not watching the road.Do hybrids have a future in Australia? carsguide.com.au