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.
Engine Electrical System - Hybrid Control System/Starter/Battery Cable - Repair (G12)
2021 BMW 740i xDriveSECTION Engine Electrical System - Hybrid Control System/Starter/Battery Cable - Repair (G12)
- 12 36 Control System, Hybrid/Electric Drive
- 12 36 014 Removing/installing electrical machine electronics (front) (740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022)
- 12 36 610 Replace electrical machine electronics (after vehicle diagnosis) (740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022)
- 12 37 901 Replace pressure compensation element in the EME lid rear (Drive unit removed) (all 7' series models 2016-2022)
- 12 41 Starter With Attachment
- 12 41 020 Removing and installing/replacing starter motor (740i 2016-2022)
- 12 41 041 Replacing the engagement solenoid switch (all 7' series models 2016-2022)
- 12 41 020 Removing and installing/replacing starter motor (740i xDrive 2017-2022)
- 12 41 020 Removing and installing/replacing starter motor (740e xDrive PHEV 2017-2019)
- 12 41 020 Removing and installing/replacing starter motor (745e xDrive PHEV 2020-2022)
- 12 41 020 Removing and installing/replacing starter motor (750i 2016-2019)
- 12 41 020 Removing and installing/replacing starter motor (750i xDrive 2016-2022)
- 12 41 020 Removing and installing/replacing starter motor (M760i xDrive 2017-2022)
- 12 42 Starter Line
- 12 42 540 Replacing the safety battery terminal (SBK) (all 7' series models 2016-2022)
- 12 42 651 Removing and installing/replacing the positive battery cable remote positive terminal alternator (740i 2016-2022, 740i xDrive 2017-2022)
- 12 42 652 Removing and installing/replacing the positive battery cable remote positive terminal starter (after vehicle diagnosis) (740i 2016-2022)
- 12 42 652 Removing and installing/replacing the positive battery cable remote positive terminal starter (after vehicle diagnosis) (740i xDrive 2017-2022)
- 12 42 652 Removing and installing/replacing the positive battery cable remote positive terminal starter (after vehicle diagnosis) (740e xDrive PHEV 2017-2019)
- 12 42 500 Removing and installing/replacing the positive battery cable (after vehicle diagnosis) (between alternator/starter and auxiliary terminal for jump starting) (750i 2016-2019)
- 12 42 651 Removing and installing/replacing the positive battery cable remote positive terminal alternator (after vehicle diagnosis) (750i xDrive 2016-2022)
- 12 42 652 Removing and installing/replacing the positive battery cable remote positive terminal starter (750i xDrive 2016-2022)
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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.