Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Seat Weight Sensor: Description
The seat weight sensors (4) are strain gauge-type units. The electronic elements of the sensor are encased in a potting material within the molded plastic sensor housing. Four sensors (4) are used in the Occupant Classification System (OCS). A sensor is located at each corner of the passenger side front seat.
The strain gauge for each sensor is secured by three screws and nuts (2) between the seat cushion frame and the seat adjusters (3). A molded connector receptacle (1) integral to each sensor housing is connected to the vehicle electrical system through a dedicated connector and take out of the passenger seat wire harness beneath the seat cushion frame.
The seat weight sensors cannot be adjusted or repaired and, if faulty or damaged, the entire sensor must be replaced.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.