Description
Product Overview
The BOXI Brake Wear Sensor is engineered for modern BMW vehicles, delivering reliable wear detection through an electrical signal output. Constructed from a combination of high‑strength metal and resilient plastic, the sensor balances durability with lightweight design. Its measuring range of 1.5 mm to 11.5 mm covers the full spectrum of brake pad wear, while the flange‑mounting type ensures a secure, vibration‑resistant installation. The sensor operates at a sensing distance of 10 cm, providing timely alerts to the vehicle’s onboard diagnostics system. With a compact package measuring 6.14 × 4.65 × 2.05 inches and weighing only 3.52 oz, it fits seamlessly into the brake assembly without requiring additional modifications.
Usage
Designed for front and rear brake applications, this sensor is ideal for daily commuters, performance enthusiasts, and fleet operators who demand consistent braking performance. It is compatible with a broad range of BMW models, including the 330i GT xDrive (2017‑2018), 230i xDrive (2017‑2018), 320i (2013‑2018), 430i (2017‑2018), M240i xDrive (2017), and many others listed in the compatibility chart. Installation is straightforward: the sensor bolts onto the existing flange, connects to the vehicle’s electrical system, and begins monitoring pad thickness immediately. Regular monitoring helps prevent unexpected brake wear, reduces maintenance costs, and enhances safety on city streets and highways alike.

Why Choose Us
BOXI combines over a decade of automotive parts expertise with rigorous quality control. Each sensor undergoes multi‑stage testing for signal accuracy, temperature resistance, and mechanical endurance. Our 1‑year limited warranty covers any manufacturing defects, and our dedicated customer support team is available to assist with fitment questions or installation guidance. By choosing BOXI, you receive a product that meets OEM specifications (part numbers 34356792289 and 34356792292) while offering the reliability of a premium aftermarket solution.
Key Features
- Robust metal‑and‑plastic construction for long‑lasting durability
- Precise electrical signal output compatible with BMW diagnostic systems
- Wide measuring range of 1.5 mm to 11.5 mm covers full brake pad life
- Flange mount design enables quick, tool‑free installation
- OEM‑approved part numbers ensure perfect fit for multiple BMW models
FAQ
Is this sensor compatible with my specific BMW model?
Yes, the sensor is designed for a range of BMW series from 2013‑2018. Please refer to the compatibility list in the product details or use the year/make/model selector on the product page to confirm.
Do I need any special tools to install the sensor?
No special tools are required. The sensor uses a standard flange mounting system that bolts directly onto the existing brake hardware. A basic socket set is sufficient for installation.
How does the sensor communicate wear information?
The sensor generates an electrical signal that is read by the vehicle’s onboard diagnostics (OBD) system. When the brake pad reaches the preset wear limit, the system triggers a warning light on the dashboard.
What warranty does BOXI provide?
BOXI offers a 1‑year limited warranty covering any manufacturing defects. If you encounter any issues, contact our customer support for a replacement or refund.
Can I replace the sensor myself?
Yes, the sensor is designed for DIY installation. Follow the included instructions, ensure the vehicle is safely lifted, and disconnect the battery before connecting the sensor to avoid electrical shorts.




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