Although, the N54 engine has an all aluminum crankcase, many of the bolts are
still aluminum as on the N52.
This is to reduce any potential confusion between steel and aluminum bolts.
Some bolts, for example, are steel
such as the cylinder head cover bolts. This is possible, due to the plastic
cy
Engines with 4 or 6 cylinders
Vehicle identification number
Filler neck for washer fluid
Jump-starting, negative battery terminal
Jump-starting, positive battery terminal
Oil filler neck
Coolant reservoir, auxiliary cooling
Coolant reservoir, engine
8-cylinder engine
Filler neck for was