Test precondition:

WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.

The correct fuel pressure regulator is fitted.

Using the EPC, check whether the fuel pressure regulator suitable for the car is fitted: Connect test adapter. Refer to 13 31 029 Checking fuel pump delivery pressure (S54) .