Volvo Sensor 21247147

This is an ABS (Anti-lock Braking System) Wheel Speed Sensor used in Volvo trucks, including the FH, FL, FE, and FM series.

Product Specifications

Average Weight: ~ 0.19 kg

Component Type: Inductive ABS Wheel Speed Sensor

Application: Truck brake systems (front and rear axle installations).

Cable Length: Typically approximately 2650 mm – 2730 mm.

Electrical Resistance: Approximately 1250 Ohm.

SL: 4A

Key Information

The ABS sensor is a safety-critical component. It relies on a magnetic field generated by an exciter ring (or sensor ring) on the wheel hub to detect speed.

By measuring wheel speed, the sensor allows the ABS ECU to determine if a wheel is about to skid. If it detects a discrepancy between wheels, it modulates brake pressure to maintain traction and steering control.