2008 Audi a4 quattro 2.0 tfsi
This is a fix for low fuel pressure issues.
Very common in these cars.
Sometimes caused by a bad cam follower, high pressure pump amongst other things.
I see a lot of people with the same issue as I had of intermittent issue that wasnt resolved from replacing all the usual suspects.
I suggest changing out the relay for the updated 644 relay before anything else.
I hope this helps someone.
I spent months changing parts and researching but not a single mention of a bad fuel pump relay.
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