2004 Jaguar S-Type Fuel Pump: Complete Replacement Guide and Best Options

If you own a 2004 Jaguar S-Type and you are experiencing hard starting, engine stalling, sputtering during acceleration, or a loud whining noise coming from the rear of the vehicle, the fuel pump is very likely the culprit. Replacing a failing fuel pump on a 2004 S-Type is a straightforward but important repair that restores reliable performance, and choosing the right replacement part—whether an OEM-style assembly or a high-performance aftermarket unit—makes all the difference in long-term durability. This guide covers everything you need to know, from recognizing symptoms and choosing the correct part number to installation tips and the best fuel pump brands on the market today.

Why the Fuel Pump Fails on a 2004 Jaguar S-Type

The 2004 Jaguar S-Type came with two main engine options: the 3.0L V6 and the 4.2L V8. Both engines rely on an in-tank electric fuel pump that delivers pressurized fuel to the fuel rail at a consistent rate. Over time, several factors contribute to fuel pump failure:

  1. Age and mileage. A fuel pump on a 2004 model year vehicle is now over two decades old. Even with regular maintenance, the internal brushes, bearings, and commutator wear out. Most factory fuel pumps are designed to last between 100,000 and 150,000 miles, and many 2004 S-Types have already exceeded that range .

  2. Running on a low fuel level. Gasoline acts as a coolant for the electric motor inside the pump. When you frequently run the tank near empty, the pump overheats, which accelerates wear and can lead to premature failure.

  3. Contaminated fuel. Dirt, rust, and debris that accumulate in the tank over the years can clog the pump's inlet strainer and damage the internal impeller. A clogged fuel filter adds extra strain on the pump, forcing it to work harder than it should .

  4. Electrical issues. A failing fuel pump relay, corroded wiring, or a bad ground connection can cause intermittent operation and eventually kill the pump entirely.

Symptoms of a Failing Fuel Pump in a 2004 S-Type

A failing fuel pump rarely fails all at once. It usually gives you warning signs first. Watch for these common symptoms:

  1. Engine cranks but won't start. This is the most obvious symptom. When the pump is dead or too weak to build pressure, the injectors never receive fuel, and the engine will crank over but refuse to fire. You may hear a brief whir from the pump when you first turn the key, but it may stop early or not come on at all.

  2. Loss of power under acceleration. If the pump cannot maintain adequate fuel pressure under load, the engine will hesitate, stumble, or feel like it is running out of gas even with a full tank. This is especially noticeable when climbing hills or merging onto the highway.

  3. Engine sputtering at high speeds. A weak pump may deliver enough fuel at idle but fail to keep up at higher RPM. You might notice a rhythmic surging or sputtering when cruising at highway speeds.

  4. Whining noise from the fuel tank. A healthy pump runs quietly. If you hear a loud, high-pitched whine coming from the rear of the car, especially when the ignition is first turned on, the pump bearings are likely worn and the pump is on its way out.

  5. Decreased fuel economy. A pump that is losing efficiency may cause the engine to run rich or lean, both of which hurt gas mileage. If you notice a sudden drop in fuel economy, the pump is worth checking.

  6. Check Engine Light. A weak fuel pump often triggers diagnostic trouble codes related to fuel pressure, such as P0087 (fuel rail pressure too low) or P0191 (fuel pressure sensor range/performance). These codes may appear before the car starts exhibiting drivability problems.

Choosing the Right Fuel Pump for Your 2004 Jaguar S-Type

Before you buy a replacement fuel pump, you need to know exactly which version fits your car. The 2004 Jaguar S-Type uses a fuel pump module assembly that includes the pump motor, fuel level sender, strainer, and in many cases the fuel pressure regulator. The pump is located inside the fuel tank and is accessed from under the rear seat or through the trunk, depending on the model.

Key Part Numbers and Compatibility

Several manufacturers produce replacement fuel pumps for the 2004 Jaguar S-Type, and it's important to match the correct part number to your engine and model year:

  1. Delphi FG1712. This is a popular aftermarket fuel pump module assembly that fits 2003–2005 Jaguar S-Type models with both the 3.0L V6 and 4.2L V8 engines. It also fits 2004–2005 XJ8 and Vanden Plas models with the 4.2L V8 . Delphi is an OEM supplier for many automakers, so this unit is a direct replacement that matches factory specifications for fit, form, and function.

  2. Delphi 548-05590496. Another Delphi option, this genuine OEM-style fuel pump is listed specifically for 2003–2005 Jaguar S-Type models . If you prefer to stick with a factory-equivalent part, this is a solid choice.

  3. APA/URO Parts 547-06249663. This aftermarket fuel pump fits 2002–2004 Jaguar S-Type models . While URO Parts is a budget-friendly option, some owners report mixed experiences with aftermarket brands, so you will want to weigh price against reliability.

  4. A-Premium APFP0783. This right-side fuel pump assembly with a sending unit fits 2003–2005 S-Type models and includes the fuel level sender . It is a budget option that includes everything you need in one box.

  5. OEM Jaguar XR849199. If you prefer to stay with genuine Jaguar parts, the factory fuel pump and sender assembly is available under part number XR849199 . It is the most expensive option, but it guarantees a perfect fit and factory-grade reliability.

  6. ECCPP E8577M. This aftermarket fuel pump assembly is compatible with 2003–2005 S-Type 3.0L and 4.2L models, as well as 2004–2005 XJ8 and Vanden Plas models. It replaces OEM part numbers C2C20262 and C2C6606 .

  7. BDFHYK E8577M. A similar aftermarket option, this electric fuel pump module assembly is designed for the same model range and engine sizes .

Right Side vs. Left Side

The 2004 Jaguar S-Type has a saddle-style fuel tank, which means there are two fuel pump modules—one on each side of the tank. The right-side pump is the primary unit that feeds the engine, and the left-side pump transfers fuel from the left side of the tank to the right side. Most replacement guides and product listings focus on the right-side pump because that is the one that fails most often. Some listings specify "Right" in the description, such as the Delphi and ECCPP units mentioned above .

What Is Included in a Fuel Pump Module Assembly?

When you purchase a fuel pump module assembly, you are getting the complete replacement unit. A typical assembly includes:

  1. The electric fuel pump motor that draws fuel from the tank and pushes it to the engine at the correct pressure.

  2. The fuel level sending unit (fuel sender), which measures how much fuel is in the tank and sends that information to the gauge on the dashboard.

  3. The inlet strainer (fuel sock) that filters out dirt and debris before fuel enters the pump.

  4. The fuel pressure regulator in some designs, which maintains consistent pressure in the fuel rail.

  5. The mounting flange and gasket that seal the opening in the fuel tank.

Buying the complete module assembly is almost always the smarter choice compared to replacing just the bare pump motor. It saves you from having to reuse old components like a worn fuel sender or a clogged strainer, and it simplifies the installation process.

Step-by-Step: How to Replace the Fuel Pump on a 2004 Jaguar S-Type

Replacing the fuel pump on a 2004 S-Type is a job that a confident DIYer can handle in a weekend. However, it does require careful attention to safety, since you are working with the fuel system. Here is a general outline of the process:

Step 1: Prepare the Vehicle

  1. Make sure the car is parked on a level surface and the ignition is off.

  2. Relieve fuel pressure by removing the fuel pump fuse and cranking the engine for about 10 seconds until it stalls. This releases the pressure in the fuel lines.

  3. Disconnect the negative battery cable to prevent any electrical shorts.

  4. Have a fire extinguisher rated for Class B (flammable liquids) nearby, just in case.

Step 2: Access the Fuel Pump

On the 2004 S-Type, the right-side fuel pump is accessed through an access panel under the rear seat cushion. The exact procedure may vary slightly depending on your trim level, but in general:

  1. Remove the rear seat bottom cushion. It is typically held in place by clips that you release by pulling up firmly on the front edge.

  2. Locate the circular access cover on the floor pan.

  3. Remove the screws or bolts holding the cover in place and lift it off.

Step 3: Remove the Old Pump Assembly

  1. Disconnect the electrical connector and the fuel lines. The fuel lines may be secured with quick-disconnect fittings. Use the proper tool to release them, and have a rag handy to catch any residual fuel.

  2. Remove the locking ring or retaining nuts that hold the pump assembly in place. Some models use a large threaded ring that requires a special spanner wrench.

  3. Carefully lift the pump assembly out of the tank. The fuel level float arm is delicate, so angle the assembly as you pull it out to avoid bending it.

  4. Note the orientation of the pump assembly, especially the alignment tabs and the position of the float arm, so you can install the new one correctly.

Step 4: Install the New Pump Assembly

  1. Transfer any components from the old pump to the new one if your new unit does not include them, such as the rubber seal or the locking ring.

  2. Place the new pump assembly into the tank, aligning the tabs with the notches in the tank opening.

  3. Press it down firmly and install the locking ring or retaining nuts. Tighten to the specified torque.

  4. Reconnect the fuel lines and the electrical connector. Make sure everything clicks into place securely.

  5. Reinstall the access cover and the rear seat cushion.

Step 5: Test the System

  1. Reconnect the negative battery cable.

  2. Turn the ignition to the "ON" position without cranking the engine for about 3 seconds. You should hear the fuel pump prime and then stop.

  3. Crank the engine and let it idle for a few minutes. Check for any fuel leaks around the pump assembly and the fuel lines.

  4. Inspect the fuel pressure gauge reading if you have the equipment to verify the system is working at the correct pressure.

Top Fuel Pump Brands for the 2004 Jaguar S-Type

When it comes to choosing a brand for your replacement fuel pump, you have several solid options. Each has its strengths, so the right choice depends on your budget and your expectations for longevity.

Delphi is a well-known OEM supplier with a strong reputation for quality. The Delphi FG1712 module assembly is one of the most widely used aftermarket options for the 2004 S-Type, and it consistently receives positive feedback for being a true drop-in replacement . If you are looking for factory-grade reliability without paying the full OEM price, Delphi is an excellent choice.

Genuine Jaguar (OEM) is the safest option in terms of guaranteed fit and performance. The factory part number XR849199 is what the dealer will sell you, and it is precisely engineered for your car . The downside is the price, which is significantly higher than most aftermarket equivalents. But if you are keeping your S-Type for the long term and want no surprises, OEM is the way to go.

ECCPP and BDFHYK are budget-oriented aftermarket brands that offer complete assemblies at a fraction of the cost of OEM parts. These are popular among owners who want an affordable fix and are willing to accept the risk that comes with lesser-known brands. Reviews are mixed—some owners report great results, while others note premature failures. If you choose one of these, pay close attention to the warranty and be prepared for the possibility of an earlier replacement .

A-Premium is another budget brand that sells a complete fuel pump assembly with a sending unit for the 2003–2005 S-Type . It offers decent value for the price, but again, you are trading cost for potential longevity.

What Does a Replacement Cost?

The cost of replacing the fuel pump on a 2004 Jaguar S-Type depends on whether you do the work yourself or hire a professional, and on the brand of parts you choose.

  1. Parts cost. Aftermarket fuel pump assemblies range from roughly $50 to $200 depending on the brand and whether the unit includes the sending unit. Delphi units fall in the mid to upper part of that range, which reflects their quality. OEM Jaguar parts are considerably more expensive, often exceeding $300 or more .

  2. Labor cost. If you take the car to a mechanic or a dealership, labor will likely cost between $200 and $400, depending on your region and the shop's hourly rate. The job takes about two to three hours for a professional .

  3. Total estimate. A do-it-yourself replacement can be done for as little as the cost of the new pump assembly, around $50–$200. If you hire a professional, expect a total bill of $400 to $600 or more .

Why Choose KEMSO for Your 2004 Jaguar S-Type Fuel Pump

If you are looking for a fuel pump that delivers high performance, exact OEM replacement fit, and peace of mind backed by a lifetime warranty, KEMSO is the brand you should consider. KEMSO specializes in aftermarket fuel pumps for a wide range of vehicles, including the 2004 Jaguar S-Type. Here is why KEMSO stands out from the competition:

  1. High performance. KEMSO fuel pumps are designed to meet or exceed the original equipment specifications. They deliver consistent fuel pressure and volume, which means your S-Type will run smoothly under all driving conditions, from stop-and-go traffic to full-throttle highway passing.

  2. OEM replacement quality. KEMSO pumps are engineered as direct replacements for the factory parts. They match the original dimensions, connector types, and mounting points, so installation is straightforward without any modifications. You get the same reliability as the original pump, but with modern manufacturing standards.

  3. Lifetime warranty. KEMSO stands behind its products with a lifetime warranty. That is a statement of confidence in the quality and durability of their fuel pumps. If a KEMSO pump ever fails, you are covered, which gives you the peace of mind that cheap budget parts simply cannot offer.

  4. Proven track record. KEMSO has a wide catalog of fuel pumps covering cars, motorcycles, ATVs, UTVs, and watercraft. Their products are used by enthusiasts who demand reliable fuel delivery, and the brand has built a reputation for quality in the aftermarket community. KEMSO's best-sellers include pumps for BMW motorcycles, Kawasaki jet skis, Subaru Imprezas, Ducati sportbikes, and more—showing a consistent commitment to engineering quality across every application .

  5. Easy online ordering. You can browse KEMSO's full catalog and place your order directly on their website. The site is easy to navigate, so you can quickly find the correct pump for your 2004 Jaguar S-Type and have it shipped straight to your door.

If you want a fuel pump that you can install once and never worry about again, KEMSO is the right choice. Visit https://www.kemsoracing.com/ today to find the correct high-performance fuel pump for your 2004 Jaguar S-Type.

Visit KEMSO at https://www.kemsoracing.com/ to browse their selection of high-quality fuel pumps and take advantage of their lifetime warranty. Your 2004 Jaguar S-Type deserves the best—choose KEMSO for a reliable, long-lasting fuel pump replacement.


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