My 2012 A3 2.0TDI has been off the road for well over 2 years now with a weird brake fault where the brake pedal won't go firm, no matter how many times it's bled or what parts have been replaced.
I've gone to the extreme of blocking off the brake pipes at the ABS pump and bleeding it fully again - the pedal still doesn't go firm.
So now I've blocked both brake pipes off at the Master Brake Cylinder, bled it again - and it still doesn't hold pressure. This is the THIRD master brake cylinder I've put on this car to try fixing it, and it's brand new from Audi.
In my mind, the only way that the pedal wouldn't be firm in this situation is if the internal seal has failed but the chances of having 3 different master brake cylinders with the same problem, including a brand new Audi one, seems statistically impossible.
Can anyone make any sense of this?
I've gone to the extreme of blocking off the brake pipes at the ABS pump and bleeding it fully again - the pedal still doesn't go firm.
So now I've blocked both brake pipes off at the Master Brake Cylinder, bled it again - and it still doesn't hold pressure. This is the THIRD master brake cylinder I've put on this car to try fixing it, and it's brand new from Audi.
In my mind, the only way that the pedal wouldn't be firm in this situation is if the internal seal has failed but the chances of having 3 different master brake cylinders with the same problem, including a brand new Audi one, seems statistically impossible.
Can anyone make any sense of this?