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Old 11-15-2012, 02:47 PM   #9
shanneba
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Join Date: May 2008
Location: Indiana
Posts: 2,094
My Ride: 2003 330Ci
There are several differences in the M54 after 02/2003. When was your car actually made?

The MAF is a 6 pin connector, the intake manifold does not have the air temperature sensor, the SAP uses a second MAF sensor to determine if the air pump is running.
There are also differences in the O2 sensors in the later M54 engines.

Up to 02/2003 the M54 used the MS 43 ECU, after it used a MS45 ECU.
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