Ford Focus Problems

I'd say you're looking at two different problems here, neither one of which involves the actual fuel tank (which is, indeed, 55 litres). The first problem is more likely to be the calibration of your fuel gauge that is out. If the gauge isn't reading accurately, it will tell you the tank is emptier (or fuller) than it really is. Your car is actually doing what most fuel gauges do, which is to be a bit pessimistic, suggesting there's not as much fuel still in the tank as there really is. You could have the gauge recalibrated, or simply know that even when the needle is at empty, you've still got a buffer zone of fuel remaining.

The fuel consumption, meanwhile, is another issue and it's true to say that 20 litres for 140km of driving is too thirsty. A basic tune up might help, starting with fuel filters, air cleaners and spark plugs. But don't ignore things like correct tyres pressures and whether there's a roof rack fitted; these things will affect fuel economy more than you might imagine. And never under-estimate the affect driving style has on fuel use. A driver who smashes the throttle from every green light will soon start using more fuel every kilometre.

The short answer is no. Ford changed from a range of normally-aspirated engines in late 2016, to a newer, turbocharged 1.5-litre engine for the 2016 model year.

In theory, any engine can be made to fit any car, but there's no chance of this swap being an easy or inexpensive one. You'd also have to change the transmission to suit the newer engine and then there are the thousands of modifications to things like heater cores, radiators, engine mounts, steering and suspension components, exhaust systems and anything else that could be in the wrong place to suit the newer engine. And that's before we get to the different computers the newer engine will have to run it properly. You'd probably also need to have this conversion signed off by an engineer to ensure its legality and safety, too.

The simple solution (particularly ion a relatively inexpensive car like a second-hand Focus) is to simply buy the version you want in the first place.

By buying a manual Focus, you neatly sidestep the biggest problem with this car, that of the perennially faulty DCT transmission. As a rule of thumb, the advice is to never buy a Ford with this transmission, purely because its failure is a question of when, not if.

The irony is that the rest of the car was actually pretty reliable, so as long as the recall for a potential fuel leak caused by a blocked carbon-canister has been attended to, you stand a good chance of buying a reliable car.

This all depends on whether the 2005 Focus is a Mark 1 or Mark 2 version of the Focus. So that's the first thing to ascertain. If they're both Mark 2 cars, then there's a very good chance that the boot release will be the same in either (and, therefore, interchangeable) as we're talking about the same car.

But even if the 2005 Focus is a Mark 1 model, it would still be worth physically checking to see if the release latches are the same. That's because even though the Mark 1 and Mark 2 Focuses were different cars, many manufacturers (Ford included) carried over some mechanical parts (such as latches and cables) from previous models to save on development costs. A good example of Ford doing this was the succession of 1980s Falcons including the XD, XE and XF models which all used the same exterior door handles. So compare the latch you have with the latch on offer and make sure it operates in the same way and direction, uses the same mounting points and will connect to the same cable. If so, you might just be lucky.

Just for starters, the ZX4 is a four-door sedan, while the ZX3 body is the three-door hatchback. At the very least, that will mean differences in the wiring loom as regards door-courtesy and boot/tailgate lights. Cars will have different wiring looms depending on their transmission, too, so even if the engine is the same in both cars, the loom might not be.

Then there's the more basic question of whether they're actually the same model of Ford Focus. Ford Australia switched to the all-new second-gen Focus in April 2005, and if your 2005 Focus is that newer version, the wiring will not be compatible with the 2001 model. But even if they're from the same generation of Focus, swapping a wiring loom from one car to another involves many, many hours of work.

They might both be Ford Focuses, but they're a couple of generations apart meaning that they are not only physically different, they also used different transmissions to each other. Even if, by some miracle, the older gearbox would bolt to the newer engine, the car still wouldn't have the correct electronics to make the transmission work properly.

Even if the transmission in question was a manual which requires much less in the way of electronic control, the unit in the 2008 Focus was a five-speed, while the later car used a completely different six-speed. Even things like the clutch and flywheel would be incompatible. You'd probably even find the gear-shifter for each transmission enters the cabin in a physically different spot, meaning the interior trim would no longer fit.

Ford Focus Bluetooth wasn’t a reality until the new model that arrived in 2011. But at the point, it was standard on every trim level (including voice command) and was many people’s first taste of the tech. Prompting a lot of online questions along the lines of how to connect Bluetooth to Ford Focus?’ It’s actually pretty easy. That said, the best of these earlier systems used Ford’s SYNC tech which was introduced on Focuses built from August 2012 onwards.

Bluetooth Ford Focus pairing starts with switching on the Bluetooth on your phone and making the device discoverable. Then press the Phone button on the car’s menu system and follow the prompt to Add A Device. You should then be able to select SYNC from your phone’s list of available devices, enter the security code displayed on the car’s screen and your Ford Focus Bluetooth pairing is done.

From there, you can make and receive calls, view text messages and stream music, all via the voice command system.

Luckily, your car is in the clear, and the LW Model Focus was the one with the hugely problematic dual-clutch transmission. In fact, these gearboxes were more or less ticking time bombs and more than half of them suffered – sometimes multiple – failures requiring replacement units. Ford was taken to task by the ACCC over its handling of the whole thing and was forced to quickly revise the Fiesta, Ecosport and Focus ranges. Which is why your car, the LZ model, has a turbocharged 1.5-litre engine and a conventional automatic transmission which is not only a better thing to drive, but also vastly less likely to fail prematurely and expensively.

Ford made the switch to the LZ model in 2015, largely as a response to the fearful reputation for transmission failures the LW model had gained. Our advice to anybody shopping for a Ford Focus (or Fiesta or Ecosport) is to absolutely avoid any example with the dual-clutch gearbox. Its demise will be a question of when, not if.

As both these model-years concern the same series of Focus, there would definitely be some interchangeability. Body panels should interchange readily (provided you don't try to fit the hatchback from a five-door to the boot of a four-door) and many interior fittings would also be able to be swapped (provided the interior colour and trim materials of the two cars matched).

Mechanically, however, you need to be a bit more careful. Obviously, there would be major differences between the driveline of the diesel version and the more common petrol model, but there will likely be differences to driveshafts and all sorts of components when you compare a manual Focus to an automatic one. Different trim levels can also cause interchangeability problems in terms of a base-model car not having the electrical wiring to support the convenience equipment of the upmarket version. Things like the power windows in the rear of a Focus Ghia, for instance, will cause problems in the base-model CL which relied on manual rear windows.

Perhaps you've been lucky and simply bought a freakish Focus without any DCT Powershift transmission problems. But when more than half the small Fords sold in Australia fitted with that transmission  experiencing either single or multiple failures, I'm afraid the odds are stacked against you in the longer term. It seems there are two types of Focus Powershift transmissions: Those that have failed, and; those that will fail at some stage.

The price you paid is probably about where the market is now, but this is a car we can't recommend at any price.