REPLACING ALL SPARK PLUGS (N42, N40, N46, N45, N52, N52K, N51)
Special tools required:
12 1 171
12 1 200
Necessary preliminary tasks:
Switch off ignition
Remove ignition coils.
Unscrew spark p
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It is essential to comply with the regulations as specified in the law
relating to the use of explosives when
working on airbag units and seat belt tensioners.
Airbags, seat belt tensioners etc. are pyrotechnical objects. Pyrotechnical
objects are assigned to different
danger classes on the basis
The N54 and N52KP meet ULEV II requirements for 2007. There are not many
changes to the emission
systems on these engines. The N54 engine has 2 underbody catalysts in addition
to the "near engine" catalysts
already in use from the N52.
The N51 engine, however, is a SULEV II compliant engine which