Review on π Dorman 921-131 Oil Drain Plug | M14-1.50 Standard | 17mm Head Size | Pack of 5 | Compatible with Select Audi and Volkswagen Models by Robert Cole
Does not seal - leaks
The original plug with metal ring was leaking when reinstalled after an oil change. I ordered Dorman 921-131 - it leaks too (I've tried the polished side of the o-ring up and down). The suspect metal of the o-ring is not soft enough for a good seal. Audi World suggests that a copper ring will suffice. Take it to the dealer (75k service is required anyway) for an answer.
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