2002 Audi A4 Quattro Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2002 Audi A4 Quattro
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2002 Audi A4 Quattro ProblemsCheck Engine Light Due to Vacuum Leaks, Oxygen Sensor, or Catalytic Converter Fault
The digital display portion of the instrument cluster may fail. Our technicians tell us the entire instrument cluster will need to be replaced to correct this concern.
Erratic turn signal operation can be a result of a failing turn signal flasher relay which will require replacement.
2002 Audi A4 Quattro QuestionsOil coolant gasket (1 answer)
How to replace it
Fault code P0420 is common in Audi's. And it refers to an inefficient catalytic converter. However, I have found that the fix for this fault code is seldom the catalyst itself but rather replacing the oxygen sensor.
I was hoping that someone could expand a bit on what they have read or seen ...
a mechanic said we could have problems with the transmission and the water pump it seems some of gears are not working correctly and advise us not to drive the car but when we pick up the car from him it seems ok so we are confused can you advise us what to do and if those are the problems ho...