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.

2017 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

Fuel Level Sensor: Inspection

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

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.

Courtesy of SUBARU OF AMERICA, INC.

Float position	Standard
FULL - Fuel tank seating surface H1	187.2 - 194.2 mm (7.37 - 7.646 in)
EMPTY - Fuel tank seating surface H2	21.1 - 28.1 mm (0.831 - 1.107 in)

Check the resistance between fuel level sensor terminals by the connector on top of the fuel pump.

Courtesy of SUBARU OF AMERICA, INC.

Float position	Terminal No.	Standard
FULL (A)	1 - 4	7.7 - 9.7 Ω
EMPTY (B)	1 - 4	230.9 - 235.9 Ω

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:

• 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.