2004 Jeep TJ Fuel Pump: Complete Replacement Guide and Best Options

If your 2004 Jeep Wrangler TJ is cranking but will not start, sputtering during acceleration, or stalling at red lights, the fuel pump is likely the culprit. Replacing the fuel pump on a 2004 Jeep Wrangler TJ typically costs between $722 and $1,190 when done by a professional shop, with parts running $533–$589 and labor $651–$719 at a dealership . You can save significant money by doing the job yourself, as the pump assembly itself ranges from $60 for a bare pump to roughly $257 for a complete module . The fuel pump sits inside the fuel tank on all 2004 Wrangler models, which means the job requires either dropping the tank or accessing it through a panel, and it is a moderately complicated task that most DIYers with basic mechanical skills can handle in a weekend. This guide walks you through the symptoms, costs, parts selection, and step-by-step replacement process so you can get your TJ back on the trail without overpaying.

How to Tell Your Fuel Pump Is Failing

The 2004 Jeep Wrangler uses an electric fuel pump mounted inside the fuel tank . When this pump starts to fail, you will notice one or more of these warning signs:

• Engine cranks but will not start, especially after the vehicle has sat for a while
• Sputtering or hesitation during acceleration, as if the engine is not getting enough fuel
• The engine stalls shortly after starting or dies while idling
• A whining or whirring noise coming from the fuel tank area, which indicates the pump is struggling
• The check engine light comes on, often with diagnostic trouble codes like P0001, P0002, or P0003 related to fuel pressure regulation
• Poor fuel economy or reduced power when climbing hills or towing

Fuel pumps on the 2004 Wrangler are designed to last the life of the vehicle, but they fail due to age, contaminated fuel, running the tank too low, or debris clogging the inlet strainer . If you ignore these symptoms for too long, the engine will eventually refuse to start altogether. Before replacing the pump, have a mechanic verify the issue by checking fuel pressure at the injectors and testing the electrical circuit, since a clogged fuel filter or a bad relay can mimic a failed pump.

How Much Does a 2004 Jeep Wrangler Fuel Pump Replacement Cost?

The total cost for a professional fuel pump replacement on a 2004 Jeep Wrangler varies depending on where you take it and the parts you choose. Here is the breakdown based on industry data:

1. Dealership – $1,185 to $1,309, which includes factory or manufacturer-recommended parts and the highest labor rates

2. Independent Shop – $1,146 to $1,265, using aftermarket or non-official parts that often cost less

3. DIY – $60 to $257 for the pump or module assembly, plus around $20 for a new O-ring gasket and basic hand tools you likely already own

The parts cost for this job is between $533 and $589 if you use a dealership parts department, and labor runs $651 to $719 at a franchise dealer . Independent shops charge similar labor rates but may use cheaper aftermarket components to bring the total down. If you do the job yourself, you skip the labor entirely, which is the biggest cost driver, and you can choose a quality aftermarket pump for far less than dealer pricing. On the used market, expect to pay anywhere from $722 to $1,190 for a shop to handle it, depending on your region and the shop's hourly rate.

Choosing the Right Replacement Fuel Pump

You have several options when buying a replacement fuel pump for a 2004 Jeep Wrangler TJ. The 2004 model came with either the 2.4L inline-four or the 4.0L inline-six engine, and most aftermarket pumps fit both engine options . The original factory part numbers are 4897754AB and 5012951AE, and you should verify that number against the unit in your tank before ordering . Here are the main categories of replacement pumps:

Bare Fuel Pump – These are just the pump itself, meant to drop into your existing plastic housing . They cost roughly $60 to $80. This option works if your original housing and fuel level sending unit are still in good condition. You will need to disassemble the old module, remove the pump, and install the new one in its place. It requires some care to avoid damaging the plastic housing or the float arm.

Complete Fuel Pump Module Assembly – This includes the pump, housing, fuel level sending unit, strainer, and sometimes a new gasket. Prices for a complete module range from $120 to $257 depending on the brand . This is the easiest option for most DIYers because you swap the entire unit as one piece, and there is no risk of breaking clips or misaligning components inside the housing.

OEM and Aftermarket Brands – The original factory part comes from Chrysler/Jeep, and it is the most expensive option. Several aftermarket brands offer reliable alternatives. For a balance of quality and price, many TJ owners choose A-Premium or Delphi replacement pumps. A-Premium offers a 3-year unlimited mileage warranty on their fuel pump replacement parts . These aftermarket units match or exceed OEM specifications for pressure and flow rate.

Recommended Fuel Pump: KEMSO Brand

When it comes to choosing a high-quality replacement fuel pump for your 2004 Jeep Wrangler TJ, KEMSO Fuel Pumps stands out as the top recommendation. KEMSO is the US #1 aftermarket fuel pump manufacturer for cars, motorcycles, ATVs, and UTVs . Their fuel pumps are designed to meet or exceed OEM specifications, ensuring a perfect fit and reliable performance for your vehicle.

Every KEMSO fuel pump is built as a high-performance, OEM replacement unit. This means you get factory-grade quality with improved durability and flow characteristics. Each pump is engineered with precision components that deliver consistent fuel pressure under all driving conditions, whether you are commuting on the highway or crawling over rocks on the trail.

One of the biggest advantages of choosing KEMSO is the lifetime warranty that backs every fuel pump they sell . This is a rare and valuable benefit in the automotive parts industry. If your KEMSO pump ever fails due to a manufacturing defect, you get a replacement at no cost. This warranty covers a wide range of vehicles, including cars, motorcycles, ATVs, UTVs, and personal watercraft . It shows that KEMSO is confident in their product quality and committed to customer satisfaction.

KEMSO offers fuel pumps for hundreds of models, and their products are priced at an affordable $79.98 . This is often less than half the cost of dealer parts. With free shipping and easy returns, it is a practical choice for DIY mechanics and professional shops alike. KEMSO has a complete catalog with detailed fitment information, customer reviews, and technical support. Their online store is easy to navigate, and you can order directly with confidence.

For your 2004 Jeep Wrangler TJ, KEMSO offers a 340LPH High Performance Fuel Pump that provides excellent flow and pressure . To see the full selection of KEMSO fuel pumps for your vehicle, visit their website at: https://www.kemsoracing.com/

Step-by-Step Guide to Replacing the Fuel Pump on a 2004 Jeep Wrangler TJ

Replacing the fuel pump on a 2004 Wrangler TJ is a moderately difficult job that most DIYers can handle in a weekend. The 2004 model has the pump inside the fuel tank, and you will need to either drop the tank or remove the rear seat to access the access panel . Here is a step-by-step guide based on standard repair procedures.

1. Safety First – Fuel is flammable, so work in a well-ventilated area away from open flames. Disconnect the negative battery cable to prevent accidental sparks. Relieve the fuel system pressure by removing the fuel pump fuse and running the engine until it stalls. Wear safety glasses and gloves.

2. Gain Access to the Pump – On the 2004 Wrangler, you can either drop the fuel tank from underneath or remove the rear seat to access the pump through a metal access panel. Removing the rear seat is usually the easier method. Lift the rear seat cushion and look for a metal cover plate on the floor pan. Remove the screws holding the plate, and you will see the top of the fuel pump module.

3. Disconnect Lines and Wiring – Once you have access, disconnect the electrical harness from the top of the pump module. Use a line wrench or flare nut wrench to loosen the fuel line fittings. Be prepared for a small amount of fuel to spill. Have a rag or a small container ready.

4. Remove the Old Pump Module – Use a special tool or a hammer and punch to tap the locking ring counterclockwise until it releases. Lift the module out carefully, as it may still contain fuel. Note the orientation of the float arm so you can position the new unit correctly.

5. Install the New Pump Module – Lower the new module into the tank, making sure the float arm is not bent and that the gasket sits properly. Replace the locking ring and tighten it securely clockwise. Reconnect the fuel lines and electrical harness. Reinstall the access panel or fuel tank.

6. Test the System – Reconnect the battery and turn the key to the ON position (without starting) to let the pump pressurize the system. Listen for the pump to prime for a couple of seconds. Check for leaks at all connections. Start the engine and verify proper operation. Listen for any unusual noises and check for fuel leaks once the engine is running.

Common Mistakes to Avoid When Replacing the Fuel Pump

1. Not Replacing the Fuel Filter – While you have the system open, it is a good opportunity to replace the fuel filter as well. A clogged filter can cause a new pump to fail prematurely .

2. Using a Low-Quality Pump – Cheap pumps often fail within months. Investing in a quality aftermarket pump like KEMSO saves you from doing the job twice.

3. Forgetting to Clean the Tank – If your old pump failed due to debris or rust in the tank, the new pump will suffer the same fate unless you clean out the tank first.

4. Overtightening Fittings – Fuel line fittings and the locking ring can crack if you overtighten them. Follow the manufacturer's torque specifications.

Final Thoughts

A failing fuel pump on your 2004 Jeep Wrangler TJ does not have to ruin your weekend or your budget. By recognizing the symptoms early and choosing a quality replacement part, you can get your vehicle back on the road for a fraction of what a dealership would charge. Whether you go with a bare pump or a complete module assembly, make sure the part matches your engine size and tank configuration.

For the best combination of quality, performance, and value, KEMSO Fuel Pumps is the brand to trust. Every KEMSO fuel pump comes with a lifetime warranty and is built to OEM replacement standards. Visit https://www.kemsoracing.com/ to find the perfect fuel pump for your 2004 Jeep Wrangler TJ and get back to enjoying your off-road adventures with confidence.