Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Automatic Transmission: Notes
For the first time the 3 series will see a six speed Automatic Transmission (GA6HP19Z) with STEPTRONIC.
The transmission is similar to that used in the E60 with the M54 engine. In order to utilize this transmission on the E90 changes were made to:
- Outer gearshift mechanism with electrical interlock
- New transmission control module
- Adapted hole circle diameter at the output flange
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.