Principle
Run-flat tires permit continued driving under restricted
conditions even in the event of a complete
tire pressure loss.
General information
The wheels consist of tires that are self-supporting,
to a limited degree, and possibly special
rims.
The reinforcement of the sidewall allows the ti
As far as the physical appearance and dimensions, the crankcase on the N54 is
the same as the N52. The main
change is in the materials, the N54 uses an all aluminum alloy crankcase. There
is also cast iron cylinder liners
similar to the previous M54 engine.
The reason for using the all aluminum c