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.
13 61 550 Removing and Installing/Replacing Control Unit For Direct Injection (N73)
Necessary preliminary tasks:
- Read fault memory.
- itch off ignition.
- Follow instructions for disconnecting and connecting battery.
See 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY
Disconnect battery.
- Observe removal and installation of electronic control units. See 12 00 ... INSTRUCTIONS FOR REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS
Observe following instructions before replacing control unit:
- Program control unit. See 12 14 705 PROGRAMMING CONTROL UNIT (DME/DDE)
- Code control unit.
Remove right fresh air duct. See 64 31 056 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT FRESH-AIR DUCT (AUTOMATIC A/C HIGH)
Release screw and remove holder (1).
Release screws and remove cover (2) from control unit box.
NO RELATED
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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.