Hella Behr 355251401 Disc Brake Pad Wear Sensor

Mercedes-Benz Brake Wear Sensor for Front and Rear Applications

Hella Behr 355251401 is a disc brake pad wear sensor for select Mercedes-Benz models with factory wear monitoring. It provides direct-fit coverage for multiple front, rear, front right, and rear right applications across GL, GLE, GLS, ML, R, E, S, and AMG vehicles.

Key Features

• Disc brake pad wear sensor for monitored brake systems
• Fits select Mercedes-Benz front, rear, front right, and rear right positions
• OE-style replacement for wear indicator service intervals
• Coverage for GL450, ML350, GLE350, G63 AMG, and other Mercedes-Benz models
• Hella Behr part number 355251401

Detailed Description

This Hella Behr brake pad wear sensor is used in Mercedes-Benz brake systems that trigger a dashboard warning when pad material reaches the service limit. It fits a wide range of applications, including Fits 2016-2017 Mercedes-Benz GLE350, front; Fits 2013-2017 Mercedes-Benz G63 AMG, rear; and Fits 2007-2012 Mercedes-Benz GL450, rear. The part number 355251401 is also listed for additional Mercedes-Benz GL, ML, R, E, S, GLE, and GLS applications, including front right and rear right positions where specified.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Part Addresses

• Brake wear warning light illuminated on the instrument cluster
• Damaged or broken pad wear sensor during brake service
• Incorrect brake pad wear signal after pad replacement
• Sensor-related fault codes tied to monitored brake pads
• Need for a direct replacement on Mercedes-Benz wear-indicator systems

Installation Notes and Tips

Verify the axle position and side before ordering, since this sensor is listed for multiple locations. Match the vehicle’s brake code and trim notes where shown, including applications such as GLE43 AMG and GLS450/GLS550 without Sport Brake Code U29, and E350 with or without Sport Package Code 952 depending on model year. Inspect the brake pad and connector routing during installation to ensure the warning circuit is properly seated.

Quality Assurance

Hella Behr brake components are specified for OE-style service replacement, and this sensor is cataloged for confirmed Mercedes-Benz fitments only. Part number 355251401 is listed for direct application matching across the vehicles shown above.