Originally Posted by Ron1n
QFT. The diesel isn't built the same as the N54, thus does not have a HPFP (the diesel engine doesn't need it), and so far (crossing my fingers), there are no major known issues.
Diesel have a high pressure fuel pump for sometime. HPFP are new to gasoline engine. They are require for Direct injection engine.
The HPFP in the 335d is part number 13517804409
BTW, the diesel HPFP pump the fuel to even larger pressure than the gasoline engine. A major advantage of diesel over gasoline is that diesel act as a lubricant.