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The noise could be from the electric motors themselves or in the gears and cogs that physically move the mirrors to their new positions. Pulling the mirror apart and lubricating these mechanisms might help reduce the noise and may even fix the one mirror’s reluctance to move through its full range of positions.

As far as warranty goes, the situation is a bit complicated in that the dealer may examine the noise and decide that it’s not abnormal. But what you should do before the warranty runs out is have the car examined and the problem logged at dealership level. That way, if anything goes wrong as a result of the problem, even if it’s beyond the warranty period, you have what’s called a pre-existing condition whereby the problems is Subaru’s to fix because it existed while the warranty was still current, even if it wasn’t fixed at that time. The point being that the dealer can’t delay a fix reported during the warranty period and then claim that the vehicle is out of warranty and refuse to fix the problem.

This generation of Holden engines was prone to failure of the crankcase ventilation valve (PCV). When it failed, it caused a vacuum leak in the engine that could easily cause rough running and hard starting. It would also possibly trigger a check-engine light.

Depending on the model and year of the car, you might be able to fit a replacement PCV, but sometimes the solution was to replace the entire rocker cover assembly, which included the valve in question. In many cases, the valve failure was accompanied by a failed rocker cover gasket that leaked oil on to the spark plugs, making the car run even more erratically. Don’t be tempted to try a second-hand PCV from a wrecked Barina. The chances are every high that it’s PCV will be trashed, too.

It’s a bit hard to know what’s going on here. If a tyre is scrubbing on its inside edge, it’s often a problem with the camber settings (the amount of lean on the tyre from top to bottom). If it was realigned incorrectly, it’s conceivable that too much camber was removed and now the opposite problem is occurring where the outside edge is wearing too quickly. That said, sometimes incorrect toe-in and toe-out settings can cause similarly odd tyre wear.

Either way, this sort of problem should not be beyond the skills of a wheel alignment specialist to rectify without any mechanical changes to the vehicle or its suspension. In extreme cases, adjustable suspension bushes or mounting points can be fitted in place of the standard items to provide a greater range of adjustment. You may find that rectification is warranty issue, but if the misalignment came about through wear and tear or hitting a pothole or big bump, then it may not be covered by the factory warranty. Previous crash damage that has not ben repaired properly is also another common cause of weird tyre wear due to poor wheel alignment.

You need to go back to basics here. Check that the battery is connected firmly and that all the connections and low-voltage leads that power and trigger the starter motor are in their correct places and receiving power. Don’t forget to check for earth straps and cables that might have been left off in the reassembly process, too.

If the car is getting power (and the dashboard lights suggest it is) then there’s a problem between the ignition key and the starter motor. Tackle it methodically, checking for power (a test lead or multimeter will be invaluable for this) as you work your way towards the starter motor and you’ll probably find it’s something really simple and basic. Make sure the fuse or relay for the starter motor hasn’t been fried during the gearbox swap, too.

Ford’s EcoBoost engines have a bit of a track record with blown head gaskets thanks to the fundamental design of the crankcase where it meets the cylinder head. Given the relatively high turbo-boost pressure some of these engines use to produce their impressive performance, the head gasket can fail.

But it’s also fair to say that this engine design has also seen its share of overheating problems, blown turbochargers and coolant leaks (often into the cylinders). With that in mind, don’t bother guessing what the problem is, allow a mechanic to inspect the engine and give you a professional opinion based on facts.

Mobility scooters don’t just take up volume, they can also be rather odd shapes. So the actual luggage capacity in litres is not going to give you the full answer here. Instead it comes down to whether the physical shape of the Volvo’s luggage area will work for you.

There’s really only one way to find out. And that’s to take your scooter and actually see if it will fit in the Volvo, allowing for the action of the lift and its mechanisms. You need to check things like the loading lip height and whether the Volvo’s roof is high enough to take the scooter without having to partly disassemble it before each trip. Make sure the rear door closes properly, too, without anything trying to poke through the rear window.

On the surface, there’s not much in it. The current model C-HR has 388 litres of luggage space, the Volvo CX40 410 litres. But, again, given the odd shape of a scooter and its lifting mechanism, the difference might be much greater than that in practice.

The HDC refers to the Hill Descent Control feature that allows the vehicle to crawl down a steep slope off-road without the driver applying the brakes. This function uses the car’s braking and ABS systems to operate, so any fault with it has serious implications for the vehicle’s overall safety.

You may have a dud sensor or something wrong with the wiring, electronics or even the hardware. Either way, an electronic scan should give you a few clues as to what’s causing this fault message to show up. Sometimes something as simple as a battery with low voltage can cause error messages like this to appear. But don’t ignore it; these are important safety systems and you need to know they’re working properly.

This occurs more often than you think and it’s often caused by overtightening of the sump plug when the old oil has been drained out and the new stuff is ready to go in. Generally speaking, the sump plug will be screwing into either a thin metal oil pan or a rather soft alloy sump. Either way, too much torque on the spanner that tightens it can easily strip the treads and leave you stranded. This is far from just a Haval problem – many makes and models have suffered the same fate.

The fix is usually to get the vehicle to a workshop where the mechanic can either drill out the messed up threads and cut a new thread to take an oversized sump plug. Done carefully, this can often be achieved without removing the sump.

It mightn’t seem like the vehicle is struggling, but when you consider that a caravan of this size can easily weight the best part of three tonnes, you can see how it puts a strain on every component of the vehicle towing it. It sometimes only takes a small hill or a headwind to push a towing vehicle into its discomfort zone. Do that long enough and eventually something will get hot enough to trigger the limp-home response.

But don’t rule out a check-up at a BT-50 or Ford Ranger (they’re the same vehicle under the skin) specialist who should be able to pinpoint the weak link, as well as offer solutions to stop it happening again. You might find you need a bigger transmission or engine oil cooler, or even a retune of the engine to bring it back to tip-top shape.

Accessories you’ve added can also make a difference. Have you, for instance, fitted a roof rack or larger wheels and tyres? A roof rack can add a lot of aero drag that has to be overcome, while bigger tyres can mess up the vehicle’s gearing, causing it to work harder for the same road speed as before.

Many cars will give a beep if they think the car has been locked with a door, bonnet, boot or window open, even slightly. But if you’re checked all that and everything is secure, the first thing to try is to reset the car’s body computer. The first way to try is to hold the lock button down on the remote for about 30 seconds. Sometimes this will force a reset.

If that doesn’t work, disconnect the car’s battery overnight and reconnect it next morning. You will have to rest your clock and radio station presets, but this will sometimes restore the computer to its factory settings. If none of that works, you may have a dud micro switch that’s giving the computer bad information, or the body computer itself may be on the way out.