This procedure will cause the transmission to shift poorly at a detriment to the gearbox if the relearn is not performed immediately and properly. Warning: If you have the capability of resetting transmission adaptations with INPA, I urge you not to do it unless you have the time and roadways to complete the relearn process exactly as described. When hard parts are replaced inside the transmission.This article should apply to any E-series vehicle that uses the ZF 6-Speed “Steptronic” Automatic. The ZF 6-speed automatic used in many E90-based vehicles like the 335i, X1, and 135i (among others) is an expensive transmission, and fluid replacement w/adaptation reset can be a great way to extend the life of it. When hard parts are replaced in a transmission or the fluid is changed, resetting the transmission’s adaptations may become necessary to restore shift quality. Unfortunately, a fluid and filter change is not as easy as it used to be. Throw in the fact that it’s a BMW, and the need for regular maintenance becomes quite clear. Automatic transmissions are fickle beasts which can be astronomically expensive if not maintained.
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