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.
61 35 502 Replacing trailer module (09/2006-03/2009)
Plug connectors and associated pin assignments must be adapted if the old plug connector AHM3(+) is fitted.
- Plug connector, new AHM4
- Plug connector, old AHM3(+)
Necessary preliminary tasks:
- Remove TRAILER MODULE
From build date/version 03/2007 Series E60/61:
Installation:
Cut out device holder up to marking (1).
Cut out indentation in area (2).
Make sure AHM module is exactly seated and wiring harness is correctly routed.
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.