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My 1M has the N54, same as the Z4is, fabulous engine. Not surprised the N55 is still in the top of the engines, however I am quite surprised the S55 in the M3/4 didn't do much better??
Neither my 07 335i or 1M both of which have the N54 have never had an HPFP or Wastegate issue..
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2011 1M, Valencia Orange, All options.
August 8th ED (#293 of 739 or 740)
88 E30 M3 100% OEM 73K Miles
02 E39 M5 Le Mans Blue 50K Miles
06 E46 M3 ZCP 58K Miles
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