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.
12 90 100 Replacing fan for electronics box (N52)
Necessary preliminary tasks:
- Switch off ignition
- Disconnect battery negative terminal
- Remove right MICROFILTER HOUSING
- Remove AIRBAG CONTROL UNIT
Unlock cover (1) with slide (3).
Unfasten screws (2).
Remove electronics box cover (1).
Installation:
Engage electronics box cover (1) correctly in hinges.
Security version:
Remove DME armour plating.
Disconnect plug connections (1 to 6).
Remove DME control unit.
Unlock plug connection (1) on fan for electronics box and disconnect.
Release screws (2) on device carrier.
Lift out device carrier (2).
Unlock vent duct (1) and remove in direction of arrow.
Remove cover (2) in direction of arrow.
Unscrew nuts.
Pull device holder (1) approx. 3 cm towards rear.
Remove air duct (1) from device holder (2).
Turn connecting piece (1) to right and remove.
Release screws and remove fan (1) in upwards direction.
Check function of DME.
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.