2008 Nissan Frontier Fuel Pump: Complete Buying Guide and Replacement Tips
Table of Contents
- Signs Your 2008 Nissan Frontier Fuel Pump Is Failing
- OEM Part Numbers and Compatibility for the 2008 Frontier
- Genuine Nissan vs. Aftermarket Fuel Pump Options
- Complete Module vs. Pump Only: What Should You Buy?
- Cost Breakdown: Parts and Labor
- How to Replace the Fuel Pump on a 2008 Nissan Frontier
- Why Did the Fuel Gauge Stop Working but the Truck Still Runs?
- Recommended Purchase: KEMSO Fuel Pump
- Final Thoughts
1. Signs Your 2008 Nissan Frontier Fuel Pump Is Failing
The fuel pump on your 2008 Nissan Frontier is an electric pump mounted inside the fuel tank. Its job is to draw fuel from the tank, pressurize it, and deliver it to the engine. When it starts to fail, you will notice one or more of the following symptoms:
1. Hard Starting
The engine cranks for a long time before firing up. This happens because the pump cannot build enough fuel pressure quickly. If the pump is completely dead, the engine will crank but never start.
2. Engine Sputtering at Speed
If the pump delivers an inconsistent flow of fuel, the engine may sputter or hesitate, especially during highway driving. The interruption in fuel delivery causes the engine to stumble.
3. Loss of Power Under Acceleration
When you press the gas pedal, the engine needs more fuel. A weak fuel pump cannot keep up with the demand, so the vehicle loses power or feels sluggish when accelerating.
4. Decreased Fuel Efficiency
A failing fuel pump may deliver too much or too little fuel, which upsets the air-fuel ratio. You may notice that you are filling up more often than before.
5. Engine Stalling
If fuel delivery is interrupted completely, the engine will stall while driving. This is dangerous, especially in traffic, and it is a strong signal that the pump is about to fail completely.
6. Whining Noise from the Fuel Tank
A healthy fuel pump runs quietly. If you hear a loud whining or humming sound coming from the rear of the vehicle near the fuel tank, the pump motor bearings are wearing out.
7. Fuel Gauge Not Working
This is one of the most common failure modes on this vehicle. The pump motor and the fuel level sending unit are separate components inside the same assembly. The sending unit's resistor can fail while the pump itself continues to work fine, leaving you with an inaccurate fuel gauge but a running truck.
2. OEM Part Numbers and Compatibility for the 2008 Frontier
The 2008 Nissan Frontier came with two engine options: a 2.5L four-cylinder (QR25DE) and a 4.0L V6 (VQ40DE). Both engines use an in-tank fuel pump module, but the part numbers differ slightly depending on the trim level and engine.
Here are the main OEM part numbers you will encounter:
1. 17040-ZP00A – Fuel Pump Assembly (W/Module Filter)
This is a genuine Nissan fuel pump assembly that replaces the older 17040-ZH30A. It fits all 2008 Frontier submodels including LE, Off-Road, PRO-4X, S, SE, SL, SV, and XE with either the 2.5L or 4.0L engine.
2. 17040-EA000 – Complete Fuel Pump
This is the complete pump assembly for the 2008 Frontier. It was later replaced by 17040-ZZ00A. It fits LE, Off-Road, SE, and XE trims with both engine options.
3. 17040-ZS00A – Complete Fuel Pump
Another complete pump option that was also superseded by 17040-ZZ00A. It fits LE, Off-Road, S, SE, SL, SV, and XE trims.
4. 17040-ZZ00A – Current Replacement Number
This is the current part number that supersedes both 17040-EA000 and 17040-ZS00A. If you order a replacement fuel pump from a Nissan dealer, this is likely the number they will use.
5. E8743M – Aftermarket Interchange Number
This is the standard aftermarket interchange number used by many fuel pump manufacturers. It corresponds to the same module and is used by brands like Delphi, Carter, and Airtex.
6. 323-59406, P76358M, FG0886 – Additional Interchange Numbers
These are other cross-reference numbers used in the aftermarket to identify the same fuel pump module.
The 2008 Frontier 2.4L four-cylinder engine also appears in some fitment charts, though this engine was less common in the US market.
3. Genuine Nissan vs. Aftermarket Fuel Pump Options
When you shop for a fuel pump for your 2008 Frontier, you have three main options: genuine Nissan OEM parts, premium aftermarket brands, and budget aftermarket brands. Each has its own pros and cons.
Genuine Nissan OEM
A genuine Nissan fuel pump costs between $426 and $635 for the 2008 Frontier. These parts are built to the exact specifications of your vehicle, guaranteeing proper fuel pressure and flow. They come with a factory warranty. The main downside is the price. Given that labor costs are the same regardless of which part you choose, many owners decide that the peace of mind is worth the extra money.
Premium Aftermarket (Delphi, Walbro, TRQ)
Delphi offers a fuel pump module assembly for the 2005–2019 Frontier that includes the strainer, fuel sending unit, and pressure regulator. It is priced at around $119. Walbro sells a high-quality OEM-spec fuel pump kit for the 2.5L four-cylinder Frontier for about $239. TRQ offers a complete module for about $78 with a flow rating of 36 gph and pressure between 49 and 52 PSI. These brands are generally reliable and cost significantly less than genuine Nissan parts.
Budget Aftermarket
You can find fuel pump assemblies for as little as $70–$100 from lesser-known brands. Some of these use lower-quality components and may fail prematurely. One Amazon reviewer noted that an aftermarket fuel temperature sensor threw a trouble code and the problem only went away when they switched to an OEM pump. Nissan is picky about sensors, so a cheap aftermarket unit may cause issues.
4. Complete Module vs. Pump Only: What Should You Buy?
This is an important decision that affects both cost and reliability. You have two choices:
Option 1: Complete Fuel Pump Module Assembly
This is the entire unit that drops into the fuel tank. It includes the electric pump, the fuel pressure regulator, the fuel level sending unit, the float arm, the strainer, and the housing. This is the recommended option for most owners because all components are new, and you do not have to risk damaging the old sending unit or float while transferring them to a new pump. The complete module is also easier to install.
Option 2: Pump Only
This is just the electric pump motor itself. You reuse the old sending unit, float, regulator, and housing. While the pump itself may cost less, you are still doing the same amount of labor. If the sending unit fails a few months later, you have to drop the tank again to replace it. For this reason, most mechanics recommend replacing the complete assembly unless you are absolutely certain that only the pump motor is bad.
5. Cost Breakdown: Parts and Labor
Here is a realistic look at what you can expect to pay to replace the fuel pump on a 2008 Nissan Frontier:
New OEM Part: $425–$700
New Aftermarket Part: $70–$250
Used OEM Part: $85–$130
Shop Labor: $305–$450
The total cost of the job will be higher than the part price alone because of the labor involved. The fuel tank must be lowered to access the pump, which takes about 2.5 to 3.5 hours for an experienced mechanic.
Labor is the same whether you install a $70 pump or a $600 OEM pump. Many experienced owners and mechanics will tell you that because the labor is the dominant cost, you should not install a cheap, low-quality pump. If it fails in a year, you are paying the labor cost all over again.
6. How to Replace the Fuel Pump on a 2008 Nissan Frontier
Replacing the fuel pump on the 2008 Frontier is an advanced DIY job. There is no access panel under the rear seat, so the fuel tank must be lowered from under the vehicle. Here is a step-by-step overview of the process:
Step 1: Relieve Fuel Pressure
Open the under-hood fuse box and remove the fuel pump fuse or relay. Start the engine and let it run until it stalls. This relieves the pressure in the fuel lines. Crank the engine for a few more seconds after it stalls, then turn the key off.
Step 2: Disconnect the Battery
Disconnect the negative battery cable using a 10mm socket. This prevents any accidental sparks while you are working near fuel.
Step 3: Raise the Vehicle
Safely raise the rear of the vehicle and support it with jack stands rated for at least 3 tons. Use wheel chocks on the front wheels. Work outside or in a well-ventilated area.
Step 4: Drain the Fuel Tank
The fuel tank is plastic and heavy. It is safest to work with the tank as empty as possible. If the tank is full, you will need to siphon the fuel into an approved container before lowering it.
Step 5: Disconnect the Fuel and EVAP Lines
Disconnect the fuel filler hose, EVAP hoses, and any other connections to the tank. Label them so you remember where they go.
Step 6: Lower the Fuel Tank
Support the fuel tank with a transmission jack. Remove the bolts for the tank straps and carefully lower the tank just enough to access the connections on top of the pump module.
Step 7: Remove the Pump Assembly
Clean the area around the pump thoroughly to prevent debris from falling into the tank. Disconnect the electrical connector and fuel lines from the top of the pump. Use a fuel pump lock ring tool to remove the lock ring that secures the pump assembly. Carefully lift the old assembly out, taking care not to damage the float arm.
Step 8: Install the New Pump
Install the new pump with a new O-ring or seal, making sure it is oriented correctly. Secure the lock ring, raise the tank back into position, and reconnect all hoses and lines.
Step 9: Prime the System
Reinstall the fuse, reconnect the battery, and turn the key to the "On" position a few times to prime the new pump before starting the engine.
If you are not comfortable working with fuel systems or do not have the right tools, take the vehicle to a qualified mechanic. Gasoline vapors are highly flammable, and this is a job where safety matters more than saving a few dollars.
7. Why Did the Fuel Gauge Stop Working but the Truck Still Runs?
This is a very common question among 2008 Frontier owners. The answer is that the fuel pump motor and the fuel level sending unit are two separate components inside the same assembly.
The sending unit is a variable resistor connected to a float arm. As the float moves up and down with the fuel level, the resistance changes and the gauge reads accordingly. Over time, the resistor track inside the sending unit can wear out, especially if it was exposed to fuel with contaminants or if the float arm was bent during a previous repair.
When the sending unit fails, the fuel gauge may read empty, full, or somewhere in between, regardless of how much fuel is actually in the tank. Meanwhile, the pump motor itself continues to run fine and the engine performs normally.
The problem is that you cannot replace the sending unit alone on this vehicle. It is integrated into the pump module, so you must replace the entire assembly to restore the fuel gauge function.
8. Recommended Purchase: KEMSO Fuel Pump
If you are in the market for a reliable replacement fuel pump for your 2008 Nissan Frontier, we recommend considering KEMSO brand fuel pumps.
KEMSO fuel pumps are high-performance, OEM replacement units backed by a lifetime warranty. They are engineered to meet or exceed original equipment specifications, ensuring proper fit, correct fuel pressure, and reliable long-term performance. Because fuel pump replacement is labor-intensive and requires dropping the fuel tank, you want a part you can install once and forget about. KEMSO's lifetime warranty gives you that peace of mind.
You can browse the full range of KEMSO fuel pump products at their official website:
https://www.kemsoracing.com/
The website lists applications for a wide range of vehicles, including trucks, SUVs, motorcycles, and watercraft. Each product page includes fitment information, so you can verify compatibility with your specific make and model before ordering.
9. Final Thoughts
The 2008 Nissan Frontier fuel pump is a wear item that eventually needs replacement. If you notice hard starts, sputtering, power loss, or a dead fuel gauge, do not ignore the signs. The pump is inside the tank and requires dropping the tank to access it, which means the labor cost is significant.
Here are three key takeaways to remember:
1. Replace the complete module, not just the pump.
The sending unit and float are the most common failure points. Replacing the complete assembly avoids doing this job twice.
2. Choose a quality brand.
Given that labor costs $300–$450, the difference between a $70 budget pump and a $250 premium pump is small compared to the total cost of the job. A cheap pump that fails in a year will cost you far more in the long run.
3. Verify the correct part number for your engine.
The 2.5L four-cylinder and the 4.0L V6 use different pumps, so check your engine code and the OEM reference numbers (17040-ZZ00A, 17040-ZP00A, E8743M) before ordering.
For a high-quality replacement with lifetime warranty coverage, visit KEMSO Racing at https://www.kemsoracing.com/ and find the right fuel pump for your 2008 Nissan Frontier.