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.
2018 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Fuel Level Sensor: Inspection
- Check that the fuel level sensor has no damage.
- Measure the fuel level sensor float position.NOTE: When inspecting the fuel level sensor, perform the work with the sensor installed to the fuel pump.
FLOAT POSITION STANDARD FULL to Fuel tank seating surface (A) 133.0Β±4 mm (5.236Β±0.157 in) EMPTY to Fuel tank seating surface (B) 21.6Β±4 mm (0.850Β±0.157 in) - Check the resistance between fuel level sensor terminals by the connector on top of the fuel pump.
FLOAT POSITION TERMINAL NO. STANDARD FULL (A) 1 and 2 8.7Β±1.0 Ξ© EMPTY (B) 139.1Β±2.0 Ξ©
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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