Search the Community

Hi, I purchased a new Q8 in November 2019. Ever since I’ve owned the car, the brakes appear to ‘grind’ at low speed, especially when cold. They also squeal at times. I’ve had multiple cars of this value from other manufacturers and never had this problem before (in fact, we also brought a new Q5 for my wife at the same time, and she has no issues with this). I’ve been back to the dealer and they claim it’s ‘normal’. Is this correct ? I just wanted to check other peoples experience before I go back again. Thanks

Good Morning All, I'm sure this topic has been done to death, and thus far google has shown this is a common problem.... So, to start from the beginning of my woes. During a 3 point turn, I lost all power steering as the hydraulic fitting on the end of the pressure pipe from the power steering pump, where it joins to the rack (Back of the engine bay) had corrodded so badly, it failed, dumping all my power steering fluid. I have replaced the hydraulic pressure pipe from the pump, with a like for like, made by a local hydraulic specialist. Since then, I have had the pleasure of the grinding juddering steering. We have been through the wheels in the air lock to lock bleeding process countless times, and air continues to come out. but the problem does not go away. We have ruled out turret bearings, as in the morning, when the vehicle is cold, there is no problem, it is only when the vehicle becomes hot that the problem occurs (plus it didnt do it before the pipe burst, so i can imagine that the burst pipe would cause the turret bearings to fail). I did drive the vehicle about 500 yards with no power steering, (had no choice, couldn't abandon it where it was) We have replaced the pump. So, the symptoms.... The low pressure return pipe from the rack judders like a good one when its happening, and juddering can be felt through the steering wheel, and steering rack. The symptoms are consistent with air in the system. It seems that this is a difficult problem to solve, and has lead to people replacing racks, pumps, pipes and eventually cars. Someone must know the cause? I'm interested to know if anyone has a trick or a method of fully bleeding the rack to get all the air out, as when the wheels are off the ground, going lock to lock, listening to the rack, it does make some interesting noises, much like there is still air trapped in it. I would appreciate your thoughts and experience, as i am determined to beat this somehow! Regards Darren