21585145 | Genuine Bendix Side Radar Assembly Detection System SLR20

The SLR20 Side Radar Assembly Detection System 21585145 is a commercial-truck blind spot / object detection radar sensor made mainly by Bendix for heavy-duty trucks, buses, and tractors. Side Radar Assembly Detection System SLR20

General Specifications

Fitment

International / Navistar trucks
Freightliner trucks
Volvo Trucks heavy-duty trucks
Peterbilt and Kenworth models using Bendix BlindSpotter systems
Commercial buses and fleet vehicles with Bendix collision avoidance packages

Purpose & Function

• Detect blind-spot vehicles and obstacles.
• Warn the driver before unsafe lane changes or turns.
• Help prevent side-swipe and merging accidents.
• Improve driver awareness in traffic and poor visibility conditions.
• Increase safety for trucks, buses, RVs, and other large vehicles with large blind spots.

Signs of a Bad Side Radar Assembly

• Blind-spot warning lights stop working.
• False alerts or constant warning beeps when no vehicle is nearby.
• Failure to detect vehicles in adjacent lanes.
• Warning messages on the dashboard such as:
  • “Side Radar Fault”
  • “Blind Spot System Unavailable”
  • “Radar Sensor Blocked”
• Intermittent operation — system works sometimes and fails other times.
• Lane-change assist or side object detection becomes disabled.
• Diagnostic trouble codes (DTCs) stored in the vehicle ECU.
• Physical damage to the radar sensor or mounting bracket.
• Moisture, corrosion, or dirt covering the radar sensor.
• Radar misalignment after an accident, bumper repair, or mirror replacement.

About Bendix

Bendix is a leading manufacturer of air brake systems, safety technologies, and control components for commercial trucks, buses, and trailers. Known for innovations in braking, stability, and traction control, Bendix supplies OEM and aftermarket parts across North America. It is a subsidiary of Knorr-Bremse, a global leader in braking systems.