This tool provides general guidance — not professional mechanical advice. Always have a qualified mechanic inspect your vehicle before making any repair decisions.
#1 Most Likely
ABS warning light
Typical Cost
$100 – $800
ABS wheel speed sensor replacement typically costs $200–$400 per industry repair data (2024). ABS control module replacement may cost $300–$800 or more depending on vehicle. Urgency reflects worst-case cause (loss of ABS in emergency braking on slippery roads). Prices vary by vehicle make and region.
Wide range because the exact repair depends on what's causing the symptom.
- Failed or contaminated wheel speed sensor
- Damaged ABS reluctor ring (toothed ring on hub or axle)
- Failed ABS control module
- Low brake fluid level triggering ABS fault
- Wiring damage to ABS sensor circuit
An ABS (anti-lock braking system) warning light indicates the ABS has detected a fault and has been disabled. Standard braking function is typically preserved, but the vehicle will no longer prevent wheel lockup during hard braking or on slippery surfaces. In the worst case, losing ABS on wet roads or during emergency braking may increase stopping distances and reduce steering control. This commonly warrants prompt inspection.
What a mechanic will check
A mechanic will likely scan for ABS fault codes, inspect the wheel speed sensors at each corner for damage or contamination, check ABS ring gear condition, and verify the ABS control module and wiring harness connections. A brake fluid condition check may also be performed.
What to say to your mechanic
“My ABS warning light is on. I understand my regular brakes still work but the anti-lock system may be off. Can you scan for ABS fault codes and check my wheel speed sensors to tell me what may have caused it? I want to understand what may need to be repaired before we discuss next steps.”
Script based on industry repair procedures
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