BMW 1 3 Series F20 F21 F30 Sensor Rain Light Solar Misting over HUD 9861557

BMW F20 F21 F30 Rain Sensor is an original component of the comfort and safety system, responsible for automatic control of the wipers in selected BMW 1 and 3 Series models. Thanks to precise measurement of rainfall intensity, the sensor allows for smooth, automatic adjustment of wiper frequency, improving visibility and reducing driver workload. This solution is particularly useful in daily use when weather conditions change dynamically.

Specifications and technical data

• SKU: 9861557
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9861557
• Substitutable numbers: EM, 61359475146, 9475146, 61357939168, 7939168, 61356823540, 6823540, 61359496241, 9496241, 61356806740, 6806740, 61359397908, 9397908, 61359861557, 9861557, 61356801263, 6801263, 61356819589, 6819589, 61359388380, 9388380
• Category: Other Exterior Parts & Accessories

Function and Application of the BMW Rain Sensor

The rain sensor in BMW F20, F21, and F30 works with the body control module and the wiper system, analyzing the amount of water on the windshield. Based on this data, the system selects the appropriate wiper mode – from single wipes to continuous operation, depending on the rainfall intensity. This solution:

• increases driving comfort in the rain by eliminating the need for manual wiper speed adjustments,
• improves safety by maintaining consistent visibility in front of the vehicle,
• reduces wiper blade wear through optimal control of their operation.

The component is designed according to BMW manufacturer standards, ensuring proper integration with the vehicle's electrical system and software.

Compatibility and Replacement Numbers

The presented rain sensor is part of the original BMW range, identified by a dedicated OEM part number and a set of interchangeable numbers. The presence of multiple reference numbers allows for the sensor to be fitted to various equipment versions and model years within the F20, F21, and F30 platforms, while maintaining the same function and operating logic.

Before purchasing, it is advisable to compare the markings with the existing component or the vehicle's service documentation. This will ensure that the sensor will work correctly with the comfort module, wiring harness, and windshield adapted for sensor mounting.

Benefits of Using an Original Rain Sensor

Choosing an original BMW rain sensor offers a number of practical advantages in daily use:

• Full integration with vehicle electronics – proper communication with the data bus and control modules.
• Stable operation of automatic wipers in various weather conditions.
• Reduced risk of errors in the comfort system and fault messages on the instrument cluster.
• Ability to maintain the vehicle's factory functionality after repair or windshield replacement.

The rain sensor is a component whose correct operation directly impacts driving comfort, especially in urban traffic and on highways where frequent changes in rainfall intensity are common.

Product Condition and Installation Recommendations

The offered BMW rain sensor is a used part, sourced from disassembly, allowing for economical repair while maintaining the original manufacturer's specifications. Before installation, it is recommended to inspect the adhesion surface to the windshield and use appropriate optical gel or a dedicated pad, if specified by the particular design variant.

Proper installation includes:

• correct seating of the sensor in the windshield bracket,
• checking the condition of the electrical connector and harness,
• potential adaptation or calibration in the body control module using an appropriate diagnostic tester.

A replacement carried out in this manner allows for the restoration of full automatic wiper functionality and avoids disruptions in the comfort system's operation.

Expanding the BMW Comfort System

If you are planning a comprehensive repair or upgrade of the comfort zone and body electronics in your BMW and need other components from the same group, such as control modules, light sensors, or additional body sensors, check the available parts in the Other BMW category.

To compare different manufacturers' approaches to designing powertrains, braking systems, and suspension, as well as to better understand the importance of original components in high-performance cars, it is worth reading the article Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which illustrates how significantly appropriately selected components influence a car's character.