Hi I've got a problem with an 2002 Audi A4, 1.9TDI: several times now, the brakes have locked on after braking hard. By this, I mean the brakes are jammed on after removing all pressure from the pedal. Forcing the pedal upwards seems to fix this and all is OK again.
My wife took the car into the Audi dealer today (so info is second hand) and they want to:
- replace the vacuum pump
- if that doesn't work, replace the servo.
I can see how the servo could cause this but I don't see how a vacuum pump could possibly generate these symptoms.
Any ideas?
Many thanks Mark