A damaged ABS sensor can lead to a failure of the ABS system, causing the ABS warning light on the dashboard to illuminate. During emergency braking, the wheels become prone to locking up, resulting in increased braking distances, reduced vehicle handling, and an elevated risk of losing control. Furthermore, other safety systems that rely on wheel speed signals—such as ESP and TCS—may also fail as a result, thereby compromising driving safety.

The primary consequences include:
**ABS System Failure:** The ABS sensor is responsible for monitoring wheel speed; if damaged, the system cannot detect whether a wheel is about to lock up. Consequently, during emergency braking, the system cannot intervene to modulate braking force, causing the wheel to lock completely and the vehicle to lose its steering capability.
**Dashboard Warning Light:** Upon starting the vehicle, the ABS warning light will remain continuously illuminated, signaling that an anomaly exists within the system.
**Degraded Braking Performance:** Braking distances increase, the brake pedal may feel stiff or exhibit abnormal pulsations, and the vehicle may tend to drift or fishtail during braking.
**Impact on Other Safety Systems:** Functions such as ESP (Electronic Stability Program) and TCS (Traction Control System)—which rely on wheel speed signals—will also fail, thereby reducing the vehicle's stability on slippery surfaces or during sharp turns.
**Accelerated Tire Wear:** Due to uneven distribution of braking force, individual wheels may be subjected to excessive braking, leading to uneven tire wear.
Common Causes of Failure:
Accumulation of impurities—such as metal shavings or mud—on the sensor surface, which interferes with signal acquisition.
Loose or corroded sensor connectors, or damaged wiring.
Aging or damage to the sensor's internal components.
Improper installation clearance or physical damage caused by impact.