FAQs
Do any changes need to be made to the fuel delivery unit?
No, the fuel pump fits 1:1 into the original vibration-damped bracket due to its plastic housing.
When is the 5-bar pump needed?
All engine variants up to and including the M3 3.0 (S50B32) are supplied with 3 bar fuel pressure. These include: 316, 318, 320, 323, 325, 328, and the M3 3.0.
The S50B32 and S54B32 engines require a fuel pressure of 5 bar.
What joint work is recommended when replacing the fuel pump?
When replacing the fuel pump, we also recommend replacing the hoses and our fuel tank optimization (available separately in our shop) to ensure a reliable fuel supply even in long right-hand bends.
Please note that when converting to S54B32, the fuel pressure regulator is not attached to the engine, but must be mounted as a separate part under the vehicle floor (like E46 M3 series).