2004 Nissan Quest Fuel Pump Replacement: The Complete Owner's Guide
If you own a 2004 Nissan Quest and your engine is sputtering, stalling, or struggling to start, the fuel pump is likely the root cause. The factory fuel pump on this minivan is located inside the gas tank and is part of the fuel pump assembly, meaning the entire unit needs to be replaced when it fails. The replacement cost typically ranges from $524 to $692, including parts and labor. While the job is more involved than on many other vehicles because the fuel tank must be dropped, most DIY owners with intermediate mechanical skills can handle the task in an afternoon. This guide will walk you through the symptoms, diagnosis, step-by-step replacement procedure, and how to choose the right replacement pump for your 2004 Nissan Quest.
Symptoms of a Failing Fuel Pump
Knowing the warning signs of a failing fuel pump can save you from being stranded. The 2004 Nissan Quest, equipped with a 3.5L V6 engine, relies on a steady flow of fuel at 51 psi at idle to run properly. When the pump begins to wear out, you will notice one or more of these symptoms:
Engine sputters or chokes at highway speeds. A weak fuel pump cannot maintain consistent pressure, so the engine struggles when you demand more power. You may feel the car "choking" or surging as you maintain a steady speed on the freeway.
Difficulty starting the engine. If the pump is not building enough pressure, the engine will crank longer than usual before firing. In some cases, it may not start at all.
Stalling at low speeds or idle. When the fuel pump fails to deliver enough fuel at lower RPM, the engine will stall, especially when you come to a stop at a traffic light.
Whining noise from the fuel tank. A healthy fuel pump produces a quiet hum when you turn the ignition to "on." If you hear a loud whining, screeching, or grinding sound coming from the rear of the vehicle, the pump bearings are failing.
Loss of power under load. When climbing a hill or accelerating to merge onto the highway, a failing pump cannot meet the fuel demand, causing a noticeable lack of power.
Check Engine Light. A failing fuel pump or low fuel pressure will often trigger the check engine light. Common diagnostic trouble codes include P0087 (Fuel Rail/System Pressure Too Low) or P0089 (Fuel Pressure Regulator Performance).
If you experience any combination of these symptoms, do not ignore them. Driving with a failing fuel pump can leave you stranded and may cause damage to the fuel injectors or catalytic converter from a lean fuel mixture.
Before You Start: Diagnosis and Safety
Before you buy a new fuel pump, you need to confirm the fuel pump is actually the problem. Many owners replace the pump only to find the issue was a blown fuse, a bad relay, or a clogged fuel filter. Here is how to narrow it down.
Check the fuel pump fuse and relay first. The fuel pump relay on the 2004 Nissan Quest is located in the engine bay fuse box on the driver's side, near the battery. Open the fuse box lid and locate the diagram on the underside. Find the slot labeled "FUEL PUMP." Pull the relay and inspect the fuse. If the fuse is blown, replace it and see if the pump runs. If the new fuse blows immediately, there is a short in the wiring. You can swap the fuel pump relay with an identical relay in the box (like the horn or headlight relay) to test if the pump works.
Perform a fuel pressure test. The most reliable way to diagnose a fuel pump is to check the fuel pressure. Connect a fuel pressure gauge to the fuel rail test port. Turn the key to "on" (do not start the engine). The pressure should rise to 34-41 PSI and hold steady. If the pressure is too low or drops quickly after the pump stops, the pump is weak or the check valve inside the pump is leaking.
Listen for the pump. When you turn the ignition key to the "on" position (without cranking the engine), you should hear a 2-second whir from the fuel pump in the rear of the vehicle. If you hear nothing, the pump may not be receiving power, or it has failed.
Safety first. Gasoline is highly flammable. Work in a well-ventilated area away from any open flames, sparks, or pilot lights. Wear safety goggles and gasoline-resistant gloves. Have a fire extinguisher rated for Class B fires nearby. Drain the fuel tank into an approved gasoline container before starting the job. Never smoke while working on the fuel system.
Tools and Parts You Will Need
Replacing the fuel pump on the 2004 Nissan Quest requires dropping the fuel tank. Here is what you need to have on hand before you begin:
Fuel pump assembly. The 2004 Nissan Quest uses a complete fuel pump module that includes the pump, strainer, fuel level sending unit, and housing. Do not try to replace just the pump motor inside the assembly; the integrated design means you must replace the entire module. The OEM part number for the 2004 Nissan Quest 3.5L V6 is 17040-ZD80B. Aftermarket replacements include the E8545M, P76169M, or FG0987. Bosch also makes a direct-fit replacement, part number 67991, for 2004-2009 Nissan Quest models.
Tools and supplies. You will need a socket wrench set (metric and standard), a floor jack, two jack stands, a flat-head screwdriver, a hammer, a fuel line disconnect tool (for quick-connect fittings), a container for draining fuel, a new fuel tank gasket/seal, and penetrating oil for rusty bolts.
Optional but recommended. A transmission jack or a second floor jack makes lowering the fuel tank much easier. A replacement fuel tank lock ring (part number 17343-7Y000) and a new fuel pump gasket (part number 17342-7Y000) are good insurance against leaks.
Step-by-Step Replacement Procedure
Step 1: Relieve fuel system pressure and disconnect the battery
Begin by disconnecting the negative battery cable with a socket wrench. This prevents any accidental sparks and resets the system. Remove the cover from the relay panel on the left side of the engine compartment. Detach the fuel pump relay from the panel. Start the engine and let it idle until it stalls from fuel starvation. Then crank the engine twice for 3 seconds each to relieve any remaining pressure in the fuel lines. Turn the ignition off and replace the fuel pump relay.
Step 2: Drain the fuel tank
You need to drain as much fuel as possible from the tank before removing it. With the fuel pump relay still installed, use a siphon pump or the fuel pump itself to pump fuel out through the fuel filler neck into an approved gasoline container. Alternatively, you can drain from the fuel pump access once the tank is loose, but removing the fuel weight makes handling the tank much safer and easier.
Step 3: Raise the vehicle and remove the center exhaust pipe
Jack up the rear of the vehicle and place it securely on jack stands. You need enough clearance to lower the fuel tank by about 12 inches. Locate the center exhaust pipe running under the vehicle. Using a socket wrench, remove the bolts holding the center exhaust pipe in place. You do not need to disconnect the mufflers; just lower the center section out of the way to access the fuel tank.
Step 4: Disconnect parking brake cables and fuel tank shield
Locate the parking brake cables and their mounting brackets beneath the vehicle. Disconnect the cables and push them aside. You need clear access to the fuel tank. Next, remove the bolts securing the fuel tank shield (a metal plate protecting the bottom of the tank) and set it aside.
Step 5: Detach all fuel hoses and electrical connectors
From underneath, locate the fuel tank. You will see several hoses attached to the top of the tank:
- The fuel filler hose (large rubber hose where the gas nozzle goes in)
- The evaporative emissions hose (smaller hose for the EVAP system)
- The recirculation hose (another small hose)
Use a flat-head screwdriver to loosen the hose clamps and pull the hoses off the tank fittings. Also, disconnect the electrical connector for the fuel pump. This is a multi-pin connector located near the top of the tank. Spray penetrating oil on any rusted fittings ahead of time.
Step 6: Support and lower the fuel tank
Place a floor jack under the fuel tank. Use a piece of plywood between the jack saddle and the tank to distribute the weight. Locate the two metal mounting straps that hold the tank in place. There are two bolts on each side securing the straps to the vehicle frame. Remove those bolts and carefully lower the tank with the jack. As you lower it, guide the filler neck hose out of the way. Lower the tank just enough to access the top of the fuel pump assembly.
Step 7: Remove the fuel pump assembly
With the tank lowered, you can now see the fuel pump module sitting on top of the tank. It is held in place by a large plastic locking ring. Use a hammer and a flat-head screwdriver (or a special fuel pump lock ring tool, J-16214) to tap the locking ring counter-clockwise to loosen it. Once the ring is loose, lift it off and carefully remove the fuel pump assembly from the tank. Be gentle; the fuel level sending unit is attached and can be bent easily, which would cause your gas gauge to stop working.
Step 8: Install the new fuel pump assembly
Before installing the new pump, compare it side-by-side with the old unit to make sure the hoses, electrical connectors, and sending unit are in the same positions. Transfer the large rubber gasket (O-ring) from the old assembly or use a new one. Place the new fuel pump assembly into the tank, making sure the sending unit is oriented correctly. Press the assembly down firmly. Install the locking ring and turn it clockwise with the hammer and screwdriver until it is snug. Do not overtighten, as this can crack the plastic housing.
Step 9: Reinstall the fuel tank
Raise the fuel tank back into position using the floor jack. Reconnect the fuel filler hose, emissions hoses, and the fuel pump electrical connector. Make sure all hoses are pushed on fully and the clamps are tight. Reinstall the metal mounting straps and tighten the bolts to 31 ft-lbs with a torque wrench. Reinstall the fuel tank shield, the parking brake cables, and the center exhaust pipe. Lower the vehicle.
Step 10: Prime the system and check for leaks
Fill the fuel tank with at least 3-5 gallons of fresh gasoline. Turn the ignition to the "on" position without starting the engine. You should hear the new fuel pump prime for 2 seconds. Turn the ignition off, then on again. Repeat this cycle 3-4 times to pressurize the system and purge any air from the fuel lines. Check all connections under the vehicle for leaks. Once you are confident there are no leaks, start the engine. Let it idle and inspect for leaks again. Take the vehicle for a short test drive and re-check for leaks once more.
Recommended Replacement: KEMSO Fuel Pump
When you are in the market for a replacement fuel pump for your 2004 Nissan Quest, quality matters. A cheap, no-name pump can fail within months, leaving you to repeat the entire job. That is why we recommend the KEMSO brand for your fuel pump replacement.
KEMSO Fuel Pumps are designed as high-performance, OEM replacement units. They are built to meet or exceed the original equipment specifications for your Nissan Quest. Each pump undergoes rigorous testing to ensure proper fuel pressure, flow rate, and durability. KEMSO understands that your vehicle needs reliable fuel delivery day in and day out, which is why every pump is backed by a lifetime warranty. If the pump ever fails, KEMSO will replace it at no cost to you. This kind of warranty gives you complete peace of mind, knowing your investment is protected for as long as you own the vehicle.
To find the exact KEMSO fuel pump that fits your 2004 Nissan Quest, visit their official website. You can browse their complete catalog of fuel pumps for cars, trucks, motorcycles, and powersports vehicles. Each product page includes detailed fitment information, customer reviews, and specifications to ensure you get the right part the first time. KEMSO offers fast shipping and excellent customer support to help you with any questions about installation or compatibility. Do not settle for unreliable aftermarket parts that leave you stranded. Choose KEMSO for a fuel pump that delivers performance, reliability, and a lifetime of worry-free driving.
Visit KEMSO Racing online: https://www.kemsoracing.com/
How Much Will This Job Cost?
If you do the work yourself, the cost is much lower than taking it to a shop. Here is a realistic breakdown:
- Fuel pump assembly: $80 to $250 depending on brand (Bosch or OEM are at the higher end, KEMSO offers excellent value)
- Fuel pump gasket and lock ring: $15 to $30
- Fuel (to refill the tank): varies
- Total DIY cost: approximately $100 to $280
If you take the vehicle to a mechanic, you are paying for 2-4 hours of labor plus the part. The average national cost for a Nissan Quest fuel pump replacement is between $524 and $692. Labor accounts for $145 to $183, while the parts run $378 to $509. Rates will be higher at dealerships compared to independent shops.
Common Mistakes to Avoid
Forgetting to relieve fuel pressure. If you disconnect fuel lines without relieving the pressure first, you will spray gasoline everywhere. This is dangerous and wasteful. Always pull the fuel pump relay and let the engine stall before working on the system.
Reusing the old fuel tank gasket. The rubber O-ring seal that goes between the fuel pump and the tank is a wear item. If it is flattened, cracked, or distorted, it will leak. Always install a new gasket with the pump.
Bending the fuel level sending unit. The float arm on the sending unit is thin and fragile. If you bend it when installing the pump, your gas gauge will read inaccurately. Handle the assembly with care and make sure the float arm moves freely inside the tank.
Not cleaning the inside of the fuel tank. If your old pump failed, there is likely debris, rust, or sediment at the bottom of the tank. Before installing the new pump, inspect the inside of the tank with a flashlight. If you find contamination, clean the tank thoroughly by wiping it out with a clean, lint-free cloth. Any debris that gets into the new pump will clog the strainer and cause premature failure.
Skipping the test drive. After you finish the job, do not just start the engine and call it done. Take the van for a 15-minute drive that includes both city and highway speeds. Come back, park, and inspect all connections under the vehicle for signs of fuel leakage. A pinhole leak can be a fire hazard.