Quote:
Originally Posted by tony20009
This may be a dumb question, but liking the N54 better, why do you keep switching? My car has the N54 and I'm happy with the car, so I'm keeping it until I stop being happy with it. Doesn't the 135is use the N54, or perhaps the 335is?
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the 2011 and before (i believe) 335is used the N54, however the 135is uses the N55 with the PPK2 kit installed by BMW.