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Product details
The Original BMW light switch unit with ALC, part 61-31-9-133-029, is the headlight switch that operates the lighting functions on BMW vehicles. A headlight switch is the driver's control for the car's lights, so its condition directly affects how well the road ahead is lit. BMW builds this version as one switch unit weighing 242 g (0.5 lb) and sells it individually. The ALC designation is part of BMW's own name for this switch.
BMW released 61-31-9-133-029 in December 2006 to replace the earlier switch, 61-31-6-965-392, and rates the change as exchangeable retrospectively. This unit therefore takes the place of the older number on cars built with it. Two further numbers, 61-31-6-936-830 and 61-31-6-925-074, also cross-reference to this switch, so a car fitted with any of those three earlier parts is served by the current BMW unit.
Technical Details
- Manufacturer: BMW (Original BMW part)
- Part number: 61-31-9-133-029
- BMW part name: light switch unit, ALC version
- Weight: 242 g (0.5 lb)
- Sold as: one switch unit
- Production start: December 2006
- Replaces: 61-31-6-965-392, exchangeable retrospectively
- Also cross-references: 61-31-6-936-830 and 61-31-6-925-074
Fitment & Compatibility
PMB does not yet have a confirmed vehicle application on file for this switch, so this page does not name specific models or years. Send us your 17-digit VIN and our parts team will check it against BMW's records for 61-31-9-133-029 before the switch ships.
Common Questions
What usually causes a headlight switch to fail?
Wear from everyday use, wiring problems, and exposure to rain, snow, or heat are the common causes.
Is a faulty headlight switch a safety concern?
Yes. The switch controls the headlights, interior lights, and running lights, and a faulty one can impair your vision while driving, especially in dark conditions.