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.

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HOMESERVICE MANUALSNISSAN-DATSUN2003FRONTIER BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEFUEL DELIVERYFUEL SYSTEMFUEL LEVEL SENSOR UNIT AND FUEL PUMP ASSEMBLYREMOVAL AND INSTALLATION

2003 Nissan-Datsun Frontier Base, Standard

Removal and Installation

2003 Nissan-Datsun Frontier Base, StandardSECTION Removal and Installation

Fig 1: Identifying Fuel Level Sensor Unit And Fuel Pump Assembly Components

Courtesy of NISSAN MOTOR CO., U.S.A.

Remove fuel tank. Refer to FUEL TANK .
- For removal of quick connectors, refer to step 6 of FUEL TANK .
Remove the six screws.
Remove retainer, fuel pump and fuel level sensor assembly.
Remove fuel pump with bracket while lifting the pawl of the fuel pump bracket upward.
Remove fuel level sensor.

Fig 2: Identifying Quick Connectors
Courtesy of NISSAN MOTOR CO., U.S.A.

Installation procedure is the reverse order of removal.

Install fuel pump and fuel level sensor assembly as shown.
CAUTION: Tighten the bolts to specified torque.

Fuel pump and fuel : 2.0 - 2.5 N.m (0.20 - 0.26 kg-m,

Level sensor bolts :17.4 - 22.6 in-lb)
Always replace the O-ring with a new one.
Make sure the connectors are clean and undamaged.
Use the following procedure to check for leaks.

Fig 3: Installing Fuel Pump
Courtesy of NISSAN MOTOR CO., U.S.A.

Turn ignition switch ON (do not start engine). Then check connections for leaks by applying fuel pressure to fuel piping.
Start the engine and let it idle and make sure there are no fuel leaks at the fuel system connections.

RENDER: 1.0x

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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.