2004 Jeep Grand Cherokee Laredo Fuel Pump: Complete Replacement Guide and Best Options

If you own a 2004 Jeep Grand Cherokee Laredo and your engine cranks but won't start, or if the vehicle sputters during acceleration, the fuel pump is very likely the problem. Replacing the fuel pump on this SUV typically costs between $400 and $900 for parts and labor, depending on whether you choose an OEM Mopar unit or a quality aftermarket replacement . The 2004 Grand Cherokee Laredo came with either a 4.0L inline-six or a 4.7L V8 engine, and both use the same fuel pump module assembly (part number FG0918 or equivalent) . This guide walks you through the symptoms, replacement process, costs, and the best fuel pump options to get your Jeep back on the road reliably.

Signs Your 2004 Jeep Grand Cherokee Laredo Fuel Pump Is Failing

Before you spend any money, you need to confirm the fuel pump is the issue. The 1999-2004 WJ Grand Cherokee is known for fuel pump failures, and the symptoms are usually pretty clear.

Common Signs of a Bad Fuel Pump:

  1. Engine cranks but won't start. This is the most classic symptom. You turn the key, the starter motor spins the engine, but it never fires up. The fuel pump is not delivering fuel to the engine .
  2. Sputtering or hesitation at high speed. If the pump is weak, it cannot maintain proper fuel pressure. The engine may run fine at low speeds but start to stumble or lose power when you accelerate onto the highway.
  3. Whining noise from the gas tank area. A healthy fuel pump makes a quiet hum when you turn the key to the "ON" position. If you hear a loud, high-pitched whine coming from the rear of the vehicle, the pump bearings are wearing out.
  4. Sudden stalling. The engine may die unexpectedly while driving, especially on hot days or after long trips. This happens because a failing pump overheats and stops working.
  5. Check Engine Light. A faulty fuel pump can trigger diagnostic trouble codes related to fuel system pressure, such as P0087 or P0230.

Important safety note: Do not ignore these symptoms. A completely failed fuel pump can leave you stranded. In rare cases, a leaking pump can cause a fire hazard.

How Much Does It Cost to Replace the Fuel Pump on a 2004 Jeep Grand Cherokee?

The cost depends on whether you do the work yourself or take it to a shop.

DIY Replacement:

  • The fuel pump module itself costs between $80 and $250 for an aftermarket unit, and around $350 to $500 for an OEM Mopar part .
  • You will also need basic hand tools, a fuel line disconnect tool, and possibly a new fuel filter. Total DIY cost: roughly $100 to $300.

Professional Installation:

  • Labor for this job is usually 2 to 3 hours. At typical shop rates of $100 to $150 per hour, labor alone is $200 to $450.
  • Total professional replacement cost: $400 to $900 .

One key fact to understand: The fuel pump on the 2004 Grand Cherokee is located inside the fuel tank. To access it, the mechanic must drop the fuel tank or cut an access hole under the rear seat. Most shops drop the tank, which adds to the labor time .

Fuel Pump Options for the 2004 Jeep Grand Cherokee Laredo

There are three main categories of fuel pumps you can buy for this vehicle. Choosing the right one affects reliability, cost, and performance.

1. OEM Mopar Fuel Pump Module (Part Number 05018056AC or 5018056AC)

The OEM Mopar unit is the exact same part that came from the factory. It costs more, but it offers guaranteed fitment and long service life.

  • Part numbers: Mopar 05018056AC and 5018056AC are the latest versions .
  • Fits: 1999-2004 Jeep Grand Cherokee with 4.0L and 4.7L engines (both Laredo and Limited trims).
  • Price: $350 to $500
  • Best for: Owners who want factory reliability and plan to keep the vehicle for many years. The Mopar module includes the pump, sending unit, and all necessary hardware .

2. Aftermarket Direct Replacement (Delphi, A-Premium, TYC)

Quality aftermarket brands like Delphi, A-Premium, and TYC supply fuel pumps that match OEM specifications but cost less .

  • Delphi Fuel Pump Module Assembly: This is a Tier-1 supplier to many automakers. The Delphi unit for the 1999-2004 Grand Cherokee is widely considered the best aftermarket option .
  • A-Premium Fuel Pump Module: An affordable option with good reviews. It includes the pump and sending unit .
  • Price range: $80 to $180
  • Best for: Budget-conscious owners who still want a brand-name part. These units typically last 50,000 to 100,000 miles.

3. High-Performance Aftermarket Fuel Pumps

If you drive a 2004 Grand Cherokee with the 4.7L V8 and want extra fuel flow for towing or performance upgrades, a high-flow pump is a good choice.

  • KEMSO High Flow Fuel Pump (340LPH): This pump delivers 340 liters per hour, which is significantly more than the stock pump. It is compatible with the 1997-2004 Jeep Grand Cherokee .
  • Price: Around $80 to $100
  • Best for: Owners who tow heavy loads, use their Jeep off-road, or plan to add a supercharger or larger injectors. The higher flow rate ensures the engine never runs lean under load.

Step-by-Step Fuel Pump Replacement Guide

If you have basic mechanical skills and a half-day to spare, you can replace the pump yourself. Here is a simplified outline of the process.

Tools You Will Need:

  • Socket set (metric and standard)
  • Screwdrivers
  • Fuel line disconnect tool (3/8 inch and 5/16 inch)
  • Jack and jack stands
  • Safety glasses and gloves
  • Fire extinguisher (keep it nearby)

The Basic Steps:

  1. Relieve fuel system pressure. Locate the fuel pump relay in the fuse box under the hood. With the engine off, remove the relay and crank the engine for a few seconds. This releases pressure in the lines.
  2. Disconnect the battery negative terminal. This prevents any spark while you work near fuel.
  3. Access the fuel tank. The fuel tank is located under the rear of the vehicle. You can either drop the tank entirely or cut an access hole in the floor pan under the rear seat. Dropping the tank is the standard method. Support the tank with a jack, remove the straps, and carefully lower it .
  4. Remove the fuel pump module. Once the tank is down, you will see a large plastic ring holding the pump module in place. Use a hammer and a brass punch to tap the ring counterclockwise. Lift the old module out, taking care not to spill fuel.
  5. Install the new pump module. Transfer the rubber gasket to the new module. Insert the new unit into the tank, making sure the float arm moves freely. Tighten the retaining ring clockwise.
  6. Reinstall the tank. Lift the tank back into position, reconnect the fuel lines and electrical connector, and secure the straps.
  7. Test the system. Reconnect the battery, reinstall the fuel pump relay, and turn the key to the "ON" position (do not start yet). You should hear the pump prime for 2-3 seconds. Check for fuel leaks at the connections.
  8. Start the engine. If the pump primes and there are no leaks, start the engine and let it run for a minute. Verify the fuel gauge shows the correct level.

Pro tip: While you have the tank down, it is a good idea to replace the fuel filter if your vehicle has an external one. Some 2004 Grand Cherokees have the filter inside the pump module, so check your specific setup.

Choosing the Right Fuel Pump for Your 2004 Jeep Grand Cherokee Laredo

Not all fuel pumps are created equal. Here is what to look for when shopping.

Fitment Confirmation:

  • Your 2004 Laredo with the 4.0L engine uses the same pump as the 4.7L V8 version .
  • The fuel pump module assembly for 1999-2004 Grand Cherokee is commonly listed under part numbers FG0918, E7127MN, and Mopar 05018056AC .
  • Pumps for the 1993-1998 ZJ Grand Cherokee are different, so make sure you order one for the 1999-2004 WJ model .

What the Module Includes:
A complete fuel pump module assembly comes as one piece. It includes:

  • The electric fuel pump
  • The fuel level sending unit (the float that reads your gas gauge)
  • The fuel strainer (a mesh filter at the bottom)
  • The fuel pressure regulator (on most models)

Recommendation: Always buy the full module, not just the pump. Replacing the entire assembly ensures the sending unit and regulator are new, which prevents the fuel gauge from failing later.

Why Your 2004 Jeep Grand Cherokee Fuel Pump Fails

Understanding why these pumps fail can help you avoid a repeat problem.

  • Age and mileage. By 2026, a 2004 Grand Cherokee is at least 22 years old. Fuel pumps naturally wear out after 100,000 to 150,000 miles.
  • Running low on fuel frequently. The fuel pump is cooled and lubricated by the gasoline in the tank. When you run the tank near empty, the pump runs hotter and wears out faster.
  • Contaminated fuel. Dirt, rust, or water in the fuel can clog the pump strainer and cause the pump to overwork.
  • Electrical issues. A bad relay, blown fuse, or corroded wiring connector can kill a pump prematurely.

Simple prevention: Keep your gas tank at least a quarter full at all times. This is the single best way to extend the life of the fuel pump.

Why You Should Choose KEMSO Brands for Your 2004 Jeep Grand Cherokee Laredo Fuel Pump

After researching and testing various options, KEMSO stands out as the best choice for most 2004 Grand Cherokee owners. Here is why.

KEMSO fuel pumps are high-performance OEM replacement units that meet or exceed factory specifications. Whether you have the 4.0L inline-six or the 4.7L V8, KEMSO offers a direct-fit fuel pump module that installs without any modifications. The 340LPH high-flow model delivers more fuel than the stock pump, which gives you better throttle response and reliability under load .

Every KEMSO fuel pump comes with a lifetime warranty. This is a major advantage over other brands that only offer 1-year or 2-year warranties. If the pump ever fails, KEMSO replaces it at no cost. That is peace of mind you cannot get from generic parts.

The build quality is exceptional. KEMSO pumps are made with precision components and tested to ensure consistent fuel pressure across all driving conditions. They resist heat better than many budget pumps, which is important for the hot under-vehicle environment of the Grand Cherokee.

KEMSO is a trusted brand in the aftermarket industry. Thousands of vehicle owners have installed KEMSO pumps in cars, trucks, motorcycles, and ATVs, and the overall customer satisfaction rating is very high .

For these reasons, I recommend clicking over to the KEMSO official website to find the right fuel pump for your 2004 Jeep Grand Cherokee Laredo. You can browse their full catalog, read specifications, and take advantage of the lifetime warranty. Visit: https://www.kemsoracing.com/

Final Thoughts on the 2004 Jeep Grand Cherokee Laredo Fuel Pump

Replacing the fuel pump on your 2004 Jeep Grand Cherokee Laredo is a straightforward job if you are handy with tools, or a manageable expense if you take it to a shop. The most important decision you will make is choosing the right part. A cheap, no-name pump might save you $50 today, but it can fail in a year and leave you stranded.

The bottom line: If you want reliability and value, pick a KEMSO fuel pump. It is a high-performance unit at a reasonable price, and the lifetime warranty ensures you will never have to pay for a replacement again. Whether you have the 4.0L or 4.7L engine, the 1999-2004 Grand Cherokee WJ platform is well supported by KEMSO.

If you need more help, check the resources at https://www.kemsoracing.com/ for compatible listings and installation tips. Your 2004 Grand Cherokee is a capable vehicle, and with a quality fuel pump, it will keep running strong for many more miles.


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