2020 Audi Q5 Pricing and Specs

The first thing to figure out is which version of the 2012 Q5 you have. See, in that year, Audi updated the Q5 and, in the interests of fuel saving, changed from a conventional hydraulic power-steering system to an electro-mechanical one. Each system has the potential to give problems, but for very different reasons. The change came in late 2012 (December) so your car is probably the earlier one, but a check of the build-plate will tell all.

In the case of normal power-steering, low fluid can cause the problems you've noted and is also likely to make the power steering noisy when you turn the wheel. In the electro-mechanical system, the fault could be with the electric motor that powers the steering assistance. In both cases, wear in the actual steering rack can cause the same symptoms. Either way, it needs to be checked by a specialist, as a car's steering is obviously a crucial system.

But before you do that, have the car's wheel alignment checked at a tyre shop. A car that is out of whack can sometimes exhibit very strange steering characteristics. And what about the absolute basics? When did you last check your tyre pressures? Low tyre pressure can also make the steering heavier than it should be. And it doesn't matter that you haven't had a flat tyre for years; tyres lose about one psi per month, just sitting in the driveway. That's why they need to be pressure-checked every few weeks.

This is an example of why you really shouldn't ignore warning lights as they flash up on your dashboard. In the case of the dual-clutch Audi transmission you have, the warning light indicates that there's a problem inside the transmission (often that the clutch-packs have overheated). Continuing to use the vehicle normally is not recommended as the transmission requires attention to prevent this overheating occurring again and causing permanent damage to the unit.

Audi certainly knew it had a problem with these transmissions back in the day and often the root cause was traced back to the mechatronics unit (the brain that controls the gearbox's clutches and selectors) and in many cases these units were replaced.

However, the chances of Audi attending to your problem now after many years of ignoring the warnings seems a bit remote. You might be lucky and discover that the warning is something as simple as a faulty sensor, but if there's damage inside the transmission, this won't be a cheap fix. Have the vehicle scanned and see what the transmission has been trying to tell you all these years. By the way, Audi's response at the time was in the form of a service bulletin, not a recall.

This is not unheard of, but it's a very dangerous thing to be happening, especially if there are other cars around. Having the car suddenly apply the brakes as if it was mid-emergency has obvious hazards, including actually causing an accident that wasn't about to happen in the first place.

Honda (to name just one manufacturer) has had a lengthy legal battle in the USA over its cars that would confuse roadside items (like rubbish bins) as a car entering from the side, and would apply the brakes suddenly as a result. But it's not just Honda, and a RAM utility we tested recently also had the habit of confusing the smallest leaf or driveway twig with a major obstacle that had to be avoided at all costs.

At its best, it's an annoying (and heart-stopping) phenomenon and at its worst, it could cause a crash. And you can't simply disengage the Autonomous Emergency Braking system as it's an integral part of the car that contributes to its safety rating.

It needs to be sorted out and made safe. That may require the whole system, including its sensors, to be examined and possibly parts replaced. But such an essential safety system demands to be working properly.