E8502M Electric Fuel Pump Module Assembly For Nissan Sentra 2002-2006 (1.8L L4/2.5L L4) Engine 1.8L/2.5L/L4

Extended cranking, intermittent no-start, stalling, weak acceleration, low fuel pressure, or an inaccurate fuel gauge can indicate an in-tank module problem, but electrical and pressure tests should be completed before replacement. The BDFHYK E8502M is a one-tube-port fuel pump module for specified 2002–2006 Nissan Sentra sedan applications with the 1.8L or 2.5L engine. The flange port count is a critical fitment check. Confirm the one-port top plate, connector, module depth, float-arm layout, engine, body style, and OE reference against the removed assembly.

E8502M Fuel Pump Module for 2002–2006 Nissan Sentra

Application and Engine Coverage

• 2002–2006 Nissan Sentra sedan with specified 1.8L L4 applications
• 2002–2006 Nissan Sentra sedan with specified 2.5L L4 applications

The 1.8L and 2.5L engines use different vehicle calibrations, but this listing is identified by the E8502M one-tube-port module configuration. Do not select the part from the year and model alone.

Confirm the One-Tube-Port Flange

Inspect the removed module before ordering. Verify that the flange has the same single tube port, electrical connector, locking diameter, line orientation, reservoir shape, overall height, strainer position, and float-arm travel. A two-port module or a physically different flange should not be forced into the tank even when the vehicle year and engine appear in a broad catalog search.

E8502M OE and Interchange References

Common references include E8502M, 17040-8U000, 170408U000, 17040-ZG50A, 17040ZG50A, 17040ZG50C, 69889, SP4014M, and USEP8502M. Confirm the OE number and the single-port physical layout together.

Sentra Fuel-System Diagnosis Before Replacement

• Check the battery, pump fuse, relay or control circuit, power feed, and ground.
• Measure voltage and voltage drop at the module connector under load.
• Measure fuel pressure and residual pressure using the correct engine procedure.
• Inspect the connector for heat damage, corrosion, or loose terminals.
• Separate a sender or gauge fault from a pump-pressure fault.
• Inspect the tank for water, rust, sediment, or degraded fuel.

A no-start condition can also result from crank/cam sensor faults, ignition, injector control, immobilizer, wiring, or engine-management problems. Test the circuit before opening the tank.

Installation and Post-Installation Inspection

1. Relieve fuel pressure and disconnect the battery.
2. Clean the service opening and tank flange before removal.
3. Record the connector, line, flange, and float-arm orientation.
4. Remove contaminated fuel and correct damaged tank or wiring conditions.
5. Install a new seal and seat the locking ring fully.
6. Keep the strainer and float arm clear of internal tank structures.
7. Reconnect the one tube port and electrical connector without forcing the fittings.
8. Prime the system by cycling the ignition according to the service procedure.
9. Inspect for leaks and verify pressure, starting, engine operation, and gauge response.

Do not run the pump dry. A restricted fuel path, damaged connector, poor ground, or contaminated tank can shorten the service life of the replacement module.