BMW 1 2 3 4 Series F20 F21 F30 F31 F32 Rain Light Solar Sensor 6814596

BMW 1 2 3 4 Series F20 F21 F30 F31 F32 Rain Light Solar Sensor is a component from the Electronic control modules and controllers group, responsible for the automatic detection of precipitation and light intensity in selected BMW F-series models. It enables smooth operation of wipers and lights in automatic mode, improving driving comfort and road visibility in changing weather conditions. Thanks to its factory design intended for specific BMW generations, the sensor ensures proper cooperation with the electrical system and body systems.

Specifications and technical data

• SKU: 6814596
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6814596
• Substitutable numbers: 61356814596, 6814596, 61359354843, 9354843, 61359332179, 9332179, 61359387621, 9387621, 61359354225, 9354225, 61359339241, 9339241, 61359321006, 9321006, 61359347395, 9347395, 61359311711, 9311711, 61355B4A6B2, 1355462, 61355A70A01, 3557001, 61355A61844, 5561844, 61359873608, 9873608, 61356832974, 6832974
• Category: ECUs & Computer Modules

Function and application of the rain and light sensor

The presented sensor operates in the vehicle's electronic system as an input module for systems responsible for controlling wipers and exterior lighting. It analyzes signals from the windshield surface and the surroundings, and then transmits them to the body control modules, which trigger the appropriate functions. In practice, this means automatic switching on of lights in poor visibility and adjusting wiper operation to the intensity of precipitation. Thanks to integration with factory BMW electronics, the sensor works with comfort and safety systems, supporting the driver in daily vehicle operation. Stable operation of the automatic light and wiper system translates into better concentration on the road, without the need to constantly reach for switches.

Compatibility and integration with BMW electronics

The discussed component was designed for BMW F-series platforms, such as F20, F21, F30, F31, or F32, where it acts as a dedicated measurement module. As a part from the Electronic control modules and controllers group, it works with the vehicle's communication bus and appropriate body controllers, which allows for correct identification and configuration in the vehicle. Before installation, it is worth verifying compatibility with the specific equipment version and the car's model year, using the OEM part number and available interchangeable numbers in the technical specification. Such an approach minimizes the risk of module communication problems, diagnostic errors, and incorrect operation of automatic functions.

Characteristics of the used component

The offered sensor is a used component, sourced from dismantling, which allows for economical repair of the electronic system while maintaining the original BMW design. In the case of modules of this type, it is important to maintain appropriate installation conditions – correct seating against the windshield, use of the proper gel or optical pad (if required), and careful connection of the wiring harness. A used OEM component is a solution often chosen by workshops specializing in the BMW brand, because it allows for maintaining the factory logic of system operation without the need to use replacements with uncertain compatibility. Original BMW electronics usually work better with controller software, which facilitates diagnostics and potential coding.

Installation and diagnostic tips

When replacing the rain and light sensor, it is recommended to:

• check the condition of the electrical connector and wiring harness for corrosion and mechanical damage,
• apply the appropriate optical medium between the sensor and the windshield, if the design requires it,
• perform adaptation or calibration in a diagnostic tester after installation, in accordance with procedures for the BMW F-series,
• verify the operation of the automatic light and wiper mode in various lighting and weather conditions. This approach allows for restoring full system functionality and avoiding errors in the controller memory. For workshops dealing with vehicle electronics, this is a standard procedure when working with modules from the Electronic control modules and controllers group.

Choosing used electronics – additional information

If you want to better understand when it is worth reaching for used electronic modules, controllers, and sensors, it is worth reading the guide on our blog. Practical tips regarding the selection and verification of such elements can be found in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. If you are planning a comprehensive repair or modernization of the body electronics area in your BMW and need other elements from the same group, such as comfort modules, light controllers, or auxiliary sensors, check the available parts in the BMW electronic control modules and controllers category.