BMW E81 E87 E90 E91 Rear Wheel Left Right N/O/S Brake Pad Wear Sensor 1987473515

BMW E81 E87 E90 E91 Rear Wheel Left Right N/O/S Brake Pad Wear Sensor is a precision component from the Brake pad wear sensor category, designed for the braking system of BMW vehicles. It is responsible for reliably monitoring the condition of the friction linings on the rear axle, which allows for safe vehicle operation and timely brake pad replacement.

Specifications and technical data

• SKU: 1987473515
• Mark: BMW (Genuine OE)
• Condition: New
• OEM Part Number: 1987473515
• Substitutable numbers: 1987473515, 1 987 473 515
• Location on the vehicle: Rear, Right, Left
• Category: Brake Pad Wear Sensors

Purpose and vehicle placement

The presented sensor is designed for operation on the rear axle of the vehicle, with the possibility of installation on both the right and left sides. This solution simplifies part selection and allows for flexible application depending on the brake system configuration. The placement on the vehicle has been selected so that the signal cable is properly protected against mechanical damage and the influence of weather conditions.

Function in the braking system

The Brake pad wear sensor is responsible for transmitting information about the degree of wear of the friction linings to the vehicle's control unit. When the limit thickness of the brake pad is reached, the sensor circuit is broken or its resistance changes, which results in the display of a service warning light on the instrument cluster. Thanks to this, the driver receives a clear signal about the need for a brake system inspection, which increases driving safety and reduces the risk of damage to the brake discs.

Benefits of using a dedicated sensor

Using a dedicated sensor in BMW E81 E87 E90 E91 and other BMW group vehicles ensures:

• stable cooperation with the factory brake pad wear monitoring system,
• proper fit of cable length and connectors to original mounts,
• repeatable electrical parameters, consistent with the vehicle manufacturer's requirements.

Thanks to this, the installation proceeds in an orderly manner, without the need for installation modifications, and the braking system maintains its design functionality.

Professional installation and operation

To fully utilize the capabilities offered by BMW E81 E87 E90 E91 Rear Wheel Left Right N/O/S Brake Pad Wear Sensor, installation in accordance with BMW service procedures is recommended, maintaining proper cable routing and correct seating in the brake pad socket. The sensor replacement should be performed in parallel with the brake pad replacement, which minimizes the risk of reading errors and ensures data consistency in the onboard system.

If you are planning a comprehensive repair or upgrade of the braking zone in your BMW and need other elements from the same group, such as additional sensors, signal cables, or mounting elements, check the available parts in the BMW brake pad wear sensor category.

Selection of electronics and sensors – practical tips

When selecting elements such as brake pad wear sensors, it is worth paying attention to compatibility with the specific vehicle model, brake system type, and equipment version. A correctly selected component reduces the risk of errors appearing in the diagnostic system and ensures predictable system operation. If you want to better understand how to safely choose electronic elements in a car, including various types of sensors, useful information can be found in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Summary

BMW E81 E87 E90 E91 Rear Wheel Left Right N/O/S Brake Pad Wear Sensor is a technically matched component of the BMW vehicle braking system, designed for installation on the rear axle on the right or left side. It provides a reliable signal about the condition of the brake pads, supports safe vehicle operation, and facilitates brake service planning, which translates into comfort and predictability of vehicle use.