Where is the chassis sensor located?
3 Answers
Chassis sensors are used in transmission control systems, suspension control systems, power steering systems, anti-lock braking systems and other chassis control systems. There are seven types of chassis sensors, located at: 1. ABS speed sensor: installed near the wheel brake disc. 2. Steering wheel rotation sensor: installed on the steering column. 3. Yaw rate and lateral acceleration sensor: installed under the driver's seat. 4. Yaw rate and lateral acceleration sensor: installed under the driver's seat. 5. Height sensor: installed on the chassis height-adjustable suspension system. 6. Brake pad wear sensor: installed on the disc brake pad. 7. Brake pedal position sensor: installed on the brake control device.
Chassis sensors are mainly distributed in different locations under the vehicle. Common ones like ABS sensors are located near each wheel, close to the axle. If you feel the wheels slipping or the brakes acting up while driving, the sensor might be hiding there. Sensors for the suspension system are usually mounted on the shock absorbers or control arms—for example, they help adjust balance when the body sways during turns. I own an SUV myself, and once the warning light came on; it took me a while to find out that a small connector under the chassis had come loose. I recommend getting down and checking under the car with a flashlight, but be careful—don’t attempt to disassemble anything yourself, as faulty sensors can easily cause the vehicle to lose control, especially in rainy conditions. The best option is to take it to a repair shop and let a mechanic diagnose it with a scanner—it saves both money and effort.
Automotive chassis sensors are primarily embedded around the wheels or suspension components. ABS sensors are mounted near the wheel bearings to monitor rotation speed, while suspension height sensors are often attached to the base of the shock absorbers. My car is a compact model, and during the last maintenance, the mechanic pointed out the chassis to me, mentioning these small components are quite hidden and their locations vary by vehicle type. For example, SUVs with higher ground clearance may have more exposed sensors, whereas sedans require closer inspection underneath. If you want to locate them yourself, first turn off the engine, wear gloves, and use a mirror to reflect light into the chassis gaps—but avoid forcibly pulling the wiring harnesses to prevent triggering fault codes. Once located, note down the sensor model numbers in case you need to purchase replacements online. In short, these sensors act like tiny sentinels; timely repairs can prevent driving hazards.
