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Retrofit upgraded differential in 2013 135is for 135i?
Does anyone know if the upgraded differential in the 2013is (which appeared in the 2012 model as far as I know) can be used in a regular 135i (any previous model years from 2008 to 2011) ?
Also, is this the same differential being used in the 1M?
Short Write up:
The differential in the 135is comes from a new generation of final drives optimized for running smoothness and fuel efficiency. Featuring double-helical ball bearings, the differential runs at an even lower operating temperature reached more quickly than before thanks to the reduction of fluid required in the differential. Electronic rear brake management is used to simulate a differential lock for stronger acceleration in turns and low-traction conditions.
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