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.
6631001 Adjusting ACC sensor: Notes
Unclip trim (1) at points (2) and remove towards front from bumper trim (3).
Installation:
Make sure trim (1) is correctly seated.
Locking hooks (2) must not be damaged.
E90/E91 up to build date 09/2008:
Installation:
If necessary, cut off front retaining lug (1) from trim (2).
- Distance: A = 10 mm
E90/E91 up to build date 09/2008:
Measure gap dimension between front bumper trim (1) and ACC sensor (2).
- Minimum dimension: A = 3 - 5 mm
- Maximum dimension: A = 6 - 7 mm
If minimum dimension not obtained:
- Carry out preliminary work for ACC sensor adjustment.
Carry out adjustment of ACC sensor (1) with special tool 66 3 150 by means of adjusting screws (2).
Special tool required:
Active Cruise Control ACC adjusting device, complete.
Order number: 81 10 0 021 292
Consisting of:
- Mirror, complete
- Wheel laser
- Slotted diaphragm
- Control bracket (for initial installation of rail)
- Rail
- Setup and Owner's Handbook (not shown)
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.