Anti-Lock Speed Sensor Failure Signs & Maintenance Guide

Common Signs of ABS Sensor Failure

ABS Warning Light Illumination
The most immediate and obvious sign of an ABS sensor problem is when your dashboard's ABS warning light comes on. This should never be ignored as it indicates a potential safety issue.

Brake Pedal Pulsation
If you notice unusual pulsing in your brake pedal during normal braking (not emergency braking), this could indicate a faulty ABS sensor providing incorrect data to the system.

Increased Stopping Distance
When ABS sensors fail, your vehicle's braking efficiency may be compromised, resulting in longer stopping distances than normal.

Traction Control System Malfunction
Since many modern vehicles integrate ABS sensors with traction control, a failing sensor may cause your traction control system to work improperly or disable itself.

Maintenance Schedule

Regular Inspection
ABS sensors should be visually inspected during every brake service or at least once a year. Look for:

• Physical damage to sensors
• Wiring harness integrity
• Proper mounting and security
• Debris accumulation around sensors

Cleaning Schedule
Clean ABS sensors every 30,000 miles or when performing brake service. This prevents buildup of metal particles and debris that can affect sensor performance.

Replacement Guidelines
While ABS sensors don't have a specific replacement interval, they typically last 70,000 to 130,000 miles. However, replacement may be needed earlier if:

• Vehicle operates in harsh conditions
• Sensors show physical damage
• Diagnostic tests indicate degraded performance
• ABS warning light remains illuminated after inspection

Professional Testing
Have your ABS system professionally tested during annual vehicle inspections or if you notice any of the warning signs listed above.

Important Note: Never ignore ABS warning signs, as they directly affect your vehicle's safety systems. If you experience any of these symptoms, please schedule a professional inspection immediately.