BX151892 | Genuine Bendix Advanced Radar Anti-Collision Module FLR20

International (LT, ProStar)
Kenworth (T680, T880)
Peterbilt (579, 567)
Volvo / Mack trucks

1. Prevent rear-end collisions
The module tracks traffic ahead and detects when you’re closing in too fast. It:

• Warns the driver
• Can automatically apply brakes if needed

Rear-end crashes are one of the most common accidents in trucking, so this is a big deal.

2. Maintain safe following distance
When paired with adaptive cruise control, it:

• Adjusts speed automatically
• Keeps a consistent, safe gap between vehicles

This reduces driver workload on long highway drives.

3. React faster than human reflexes
Radar systems like the FLR20 can:

• Measure distance and speed instantly
• Respond in milliseconds

That’s often faster than a human can perceive and react, especially in sudden slowdowns.

4. Reduce accident severity (not just prevent them)
Even if a crash can’t be avoided, the system can:

• Slow the vehicle before impact
• Reduce damage and injury

5. Support driver awareness (not replace it)
It acts like a second set of eyes:

• Works in low visibility (dark, rain, fog)
• Alerts drivers when they might miss something

Warning lights or dash messages

The most common sign:

• “Collision Mitigation System Fault”
• “Adaptive Cruise Disabled”
• “Radar Obstructed” (when nothing is actually blocking it)

These alerts often mean the module isn’t reading correctly or has lost communication.

Adaptive cruise control stops working

Since the FLR20 feeds data to adaptive cruise:

• Cruise control may shut off suddenly
• Or refuse to activate at all

Constant or false collision warnings

A failing module can misread distance:

• Alerts when nothing is there
• Thinks vehicles are closer than they are
• Random beeping or warnings

This is a big red flag for sensor or calibration issues.

Automatic braking behaves oddly

You might notice:

• No braking when it should activate
• Or unexpected braking with no obstacle

Either case means the system isn’t interpreting radar data correctly.

System completely disabled

In more serious cases:

• The collision mitigation system shuts down entirely
• Truck runs normally, but all safety assist features are offline

Poor performance in normal conditions

Radar should work in rain and darkness. If it struggles when:

• Weather is mild
• Sensor is clean

…it could point to a failing module.

Intermittent issues

• Works sometimes, fails other times
• Errors come and go

This can indicate:

• Internal electronics failure
• Wiring/connectivity issues

Not always the module itself

Before assuming the FLR20 is bad, check:

• Dirty or blocked radar sensor (mud, ice, snow)
• Misalignment (after a bump or accident)
• Wiring/connectors
• Need for recalibration after repairs