Mini Cooper One R55 R56 R57 Xenon Headlight Rear Level Sensor 6778813

The Mini R55 R56 Xenon Headlight Level Sensor is a specialized component of the lighting system, responsible for controlling the position of xenon headlights in BMW vehicles. Mounted on the rear axle, the sensor works with the suspension to maintain a stable light beam and improve driving safety when the car's load changes.

Specifications and technical data

• SKU: 6778813
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6778813
• Substitutable numbers: 6778813, 37146778842, 37146850334, 37146785209 37146772847, 6778842 6850334 6785209 6772847, 37146866726, 6866726
• Location on the vehicle: Rear
• Category: Centre & Third Brake Light Assemblies

Purpose and Function of the Xenon Headlight Level Sensor

The Mini R55 R56 Xenon Headlight Level Sensor operates within the automatic headlight leveling system, reacting to changes in the body's position relative to the rear axle. This ensures the light beam remains directed at the correct area of the road, reducing the risk of dazzling other drivers and improving nighttime visibility.

Its rear-mounted placement allows for precise reflection of suspension movement and rapid signal transmission to the headlight control unit. This solution is particularly important in cars equipped with xenon headlights, where stable and repeatable lighting geometry is required.

Construction, Installation, and Vehicle Integration

The sensor is a component of the suspension and lighting system, working in conjunction with the headlight adjustment mechanism. Its design is intended for operation in conditions exposed to dirt, moisture, and temperature changes typical for the rear underside of the vehicle.

Key installation features:

• designed for installation on the rear of the vehicle,
• operates within the automatic leveling system for xenon headlights,
• compatible with the factory BMW lighting system in Mini R55/R56 models.

Thanks to the preservation of original mounting geometry, the sensor can be integrated into the existing system without the need for modifications to the suspension or headlight structure.

Benefits of Using an Original BMW Component

Choosing a sensor from the BMW range ensures consistency with the factory lighting control system. Proper matching of operating parameters to the vehicle's electronics translates to:

• stable operation of the automatic headlight leveling system,
• correct interaction with the rear axle suspension system,
• compliance with homologation requirements for xenon headlights.

This component, categorized under Main and Center Brake Lights, significantly impacts nighttime driving safety, especially under varying vehicle loads (passengers, luggage, trailer).

Condition, Verification, and Service Application

The offered sensor is a used part, allowing for economical repair of the lighting system while maintaining the original manufacturer's specifications. This type of component is often chosen as a replacement in situations where:

• headlight leveling system errors appear on the dashboard,
• xenon headlights shine too high or too low,
• the sensor has suffered mechanical damage due to corrosion or external interference.

The presence of the OEM part number and interchangeable numbers in the technical specifications facilitates the selection of the correct component, allowing for precise verification of compatibility with a specific vehicle configuration.

Other BMW Main and Center Brake Lights

If you are also looking for other BMW Main and Center Brake Lights, check out the BMW Main and Center Brake Lights available in our assortment to select lighting components tailored to your model.

For drivers interested in optimizing repair costs, it is also worth consulting a guide on economical servicing of popular brands – practical tips can be found in the article Repairing a Volkswagen for Pennies – How to Save on Original Car Parts, which demonstrates how to wisely utilize the used parts market, also in the context of other manufacturers.