I bought this filter at Autozone to use with some Auto-RX on my 99 A4 Avant 2.8. That was the number that was specified in their system. However, searching around here, I only see reference to a Bosch 3421 oil filter not the 3402.
Does anyone know whether this 3402 filter will work correctly?
Once I've gone through the 2,500 mile Auto-RX treatment, I will revert to a Mahle or Mann filter.
Thanks for your help.
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