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.

2008 BMW M5 (E60) V10-5.0L (S85)FACTORY OEM SERVICE PROCEDURE

Engine Control Module: Service and Repair

12 14 550 - Replacing control unit (DME) (S85)

Necessary preliminary tasks:
- Switch off ignition
- Disconnect battery negative lead Disconnecting and Connecting Battery Negative Lead

Important!
Follow instructions for removing and installing electronic control units Service and Repair.

Important!
Read and comply with notes on protection against electrostatic damage (ESD protection) 61 35 ... Notes on ESD Protection (Electro Static Discharge).

Replacement:
- Carry out programming/coding Programming and Relearning.

Unlock stopper (1) in direction of arrow.
Unfasten screws.
Lift out cover (2).

Unlock and detach plug connections on DME control unit (1).
Unlock DME control unit (2) and remove towards top.

Factory Service Tools

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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.

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