Shifting Concerns for the Six Speed Automatic Transmission on BMW ActiveHybrid 3

The 6-speed automatic transmission used in the BMW i8 from 2014-2017 is known for issues with harsh shifting, especially while the transmission is slightly warmer than normal operating temperature.

This is accompanied by slight transmission slippage, and is common with this transmission in various makes and models. Note that the check engine light does not typically illuminate due to these concerns.

The transmission software sometimes causes the slipping and harsh shifts, but in other cases the valve body is to blame.

To remedy the situation, the manufacturer of the transmission has issues various software updates, but in some cases a valve body replacement or transmission rebuild is required.