Quote:
Originally Posted by E60525d
M135i has the newer N55 engine which is more reliable.
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N55 is not more reliable than the N54. The N54 was a great block, its just BMW initially cheaped out on the surrounding components on the earlier models.
The N54 was always the engine of choice hence why it was used in the later 335is in the US. Pity it was never released here.
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2016 M140i
07 E90 335i: JB4, Trebila BEF, BMS DCI, VRSF DPs, Scoops, 19" CSL Reps, 5" ETS FMIC, VTT Inlets, BMS CP, HKS BOV, BMS Meth Injection - sold