2004 Jaguar S-Type Fuel Pump: A Complete Guide to Symptoms, Replacement, and Costs

If you own a 2004 Jaguar S-Type and notice hard starting, sputtering during acceleration, or an unexpected stall, the fuel pump is often the root cause. Replacing a failed fuel pump on this model typically costs anywhere from $1,950 to $4,865 depending on the engine and whether you use a dealership or an independent mechanic, but a well-chosen aftermarket part and a DIY approach can cut that expense dramatically. This guide walks you through everything you need to know about the 2004 S-Type fuel pump—how it works, signs of failure, replacement options, and step-by-step advice—so you can make an informed decision and get your Jaguar running reliably again.

How the Fuel Pump Works in a 2004 Jaguar S-Type

The fuel pump in your 2004 S-Type is an electric unit located inside the fuel tank. Its job is to draw gasoline from the tank and deliver it under pressure to the fuel injectors in the engine. The pump is powered by a compact electric motor, and its output is controlled by a pressure regulator to ensure the engine receives a consistent fuel supply under all driving conditions (from idle to full throttle). Filtration happens either through a pickup screen inside the tank or through an external filter mounted in the fuel line, depending on the exact configuration of your vehicle.

The 2004 S-Type came with two main engine options that affect which fuel pump assembly you need:

1. 3.0L V6 – This engine uses a specific fuel pump module assembly with the OEM part numbers C2C20262, C2C22131, C2C6606, E8577M, FG1712, P76604M, or XR849199.

2. 4.2L V8 – The V8 version uses a similar but distinct assembly. The 4.2L V8 Turbo model also shares the same replacement references.

Because the pump sits inside the tank, accessing it requires either removing the rear seat and lifting an access panel or, in some configurations, dropping the fuel tank entirely from underneath the car.

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

A failing fuel pump rarely fails without warning. Here are the most common signs that your 2004 S-Type fuel pump is going bad:

1. The engine cranks but won’t start, or it stalls and won’t restart. A fuel pump that has completely quit will prevent fuel from reaching the injectors, which means the engine cannot fire up. This is the most dramatic symptom and usually indicates full pump failure.

2. The car sputters or hesitates during acceleration. If the pump is losing pressure or volume, the engine may not get enough fuel under load. You might notice a lack of power, stumbling, or surging when you press the gas pedal.

3. A whirring or humming noise comes from the fuel tank area. As the pump wears out, its electric motor can become noisy. If you hear a loud whine from the rear of the car, especially when the ignition is first turned on, the pump is likely close to failure and should be replaced promptly.

4. The check engine light comes on. Some fuel pumps fail slowly, degrading fuel pressure over time. This can cause the engine to run lean (too much air, not enough fuel), which triggers the check engine light.

If you experience any of these symptoms, it’s wise to have the fuel pressure tested before replacing parts. A professional can confirm whether the pump itself is the culprit or if the issue lies elsewhere in the fuel system, such as the fuel filter, pressure regulator, or relay.

2004 Jaguar S-Type Fuel Pump Replacement Cost

The cost to replace a fuel pump on a 2004 S-Type varies significantly based on where you take it and whether you buy genuine Jaguar parts or aftermarket alternatives. Here is a breakdown based on real service estimates:

The wide range comes from labor rates, whether the fuel tank must be dropped, and the cost of the OEM pump assembly itself. On the low end, some independent services quote around $644 for a straightforward replacement, but dealerships and shops using genuine Jaguar parts can charge over $4,800 for the V8 models.

If you’re handy with tools, you can save a significant amount by replacing the pump yourself. An aftermarket fuel pump assembly for the 2004 S-Type typically costs between $130 and $200, and the job can be completed in two to four hours in your garage.

How to Replace the 2004 Jaguar S-Type Fuel Pump Yourself

Replacing the fuel pump on a 2004 S-Type is a moderately challenging job, but it’s doable for a careful DIYer. Here is a basic rundown of the process. Always consult your owner’s manual or a factory service manual for specifics, as the access method can vary.

Step 1: Safety first
Fuel is highly flammable. Work in a well-ventilated area with no open flames or sparks. Disconnect the negative battery cable. Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls, then cranking it a few more times. Wear safety glasses and fuel-resistant gloves.

Step 2: Access the pump
On most S-Type models, you can access the fuel pump through an access panel under the rear seat. Remove the rear seat cushion, then lift the metal access cover. If your car doesn’t have this panel, you’ll need to drain the fuel tank and lower it from the vehicle—a more involved procedure requiring a jack, stands, and disconnecting the filler neck and hoses.

Step 3: Remove the old pump assembly
Disconnect the electrical harness and fuel lines. Use a specialized tool to release the locking ring that holds the pump module in place. Carefully lift the module out—it may still contain fuel, so keep a rag or container ready.

Step 4: Transfer components if needed
If you bought a complete fuel pump module assembly (which is recommended), it should be a direct swap. If you only bought the pump itself, you’ll need to transfer the sending unit, strainer, and gasket from the old module to the new pump. Full assemblies are more reliable because they include all new parts.

Step 5: Install the new pump
Lower the new module into the tank, ensuring the float arm isn’t bent. Replace the locking ring and tighten it securely. Reconnect the fuel lines and electrical harness, then reinstall the access panel or fuel tank.

Step 6: Test the system
Reconnect the battery, turn the key to the ON position (without starting) to let the pump pressurize the system, and check for leaks. Then start the engine and verify it runs smoothly.

Choosing Between OEM and Aftermarket Fuel Pumps

When it’s time to replace the fuel pump in your 2004 S-Type, you have two main options:

1. Genuine Jaguar (OEM) parts – These are made to the exact specifications of your car. They offer guaranteed fit and reliability, but they come at a premium price—often $500 to $800 for the assembly alone, not counting labor.

2. Aftermarket replacement assemblies – Companies like BDFHYK and ECCPP offer direct-replacement fuel pump modules for the 2004 S-Type at a fraction of the OEM price. For example, BDFHYK sells a complete fuel pump module assembly for $129.99 that is compatible with the S-Type, Vanden Plas, and XJ8 models from 2003–2005. ECCPP offers a similar assembly at a comparable price point, with positive customer reviews averaging 4.4 out of 5 stars.

Aftermarket assemblies are engineered to match OEM fit, form, and function. They include everything you need for a direct swap: the pump, fuel strainer, float arm, and mounting hardware. Most are corrosion-resistant and designed for low noise operation.

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

One aftermarket brand stands out for its combination of performance, reliability, and value: KEMSO. While KEMSO’s catalog is extensive—covering cars, motorcycles, ATVs, UTVs, and personal watercraft—their fuel pumps are engineered to meet or exceed original equipment specifications.

Here’s why KEMSO is a smart choice for your Jaguar:

1. High performance at a reasonable price – KEMSO fuel pumps are priced competitively, often at half the cost or less than dealer parts. For example, many KEMSO pumps are listed at $79.98, which is far below the typical OEM replacement cost.

2. OEM replacement quality – KEMSO pumps are designed as direct replacements. They come as complete assemblies in many cases, which means no need to hunt for adapter kits or worry about poor fitment. The pumps deliver consistent fuel flow and are built to last.

3. Lifetime warranty – This is a rare benefit in the automotive parts industry. KEMSO backs every fuel pump with a lifetime warranty. If the 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, which speaks to the brand’s confidence in its product quality.

4. Free shipping and easy returns – KEMSO offers free shipping on most orders and has a straightforward return policy, making it a practical choice for both DIY mechanics and professional shops.

5. Positive customer feedback – KEMSO pumps have earned strong ratings from buyers, with many praising the build quality, fit, and performance. The brand’s eBay store holds a 98.5% positive feedback rating, with customers noting fast shipping and great communication.

To find the right KEMSO fuel pump for your 2004 Jaguar S-Type, or to explore their full catalog for other vehicles, visit https://www.kemsoracing.com/. Their website has a complete catalog with detailed fitment information, customer reviews, and technical support. Whether you need a pump for a car, truck, motorcycle, or watercraft, KEMSO has you covered.

Fuel Filters and Maintenance Tips for the 2004 S-Type

While you’re addressing the fuel pump, it’s also worth checking the fuel filter. On the 2004 S-Type, there may be a replaceable external fuel filter in the supply line. If it’s clogged, it can strain the fuel pump and mimic the symptoms of a failing pump. Here are a few maintenance tips:

1. Replace the fuel filter regularly – A clogged filter reduces fuel flow and increases pump wear. Replacing it during your pump job is cheap insurance.

2. Keep the tank at least a quarter full – The fuel pump relies on gasoline to stay cool. Running consistently on an empty tank can cause the pump to overheat and fail prematurely.

3. Use quality fuel – Poor-quality gasoline can contain contaminants that clog the strainer and damage the pump. Stick to reputable gas stations.

4. Listen for changes – If you hear a new whine from the tank area, have the fuel pressure checked immediately. Early intervention can save you from a stall on the highway.

Final Thoughts

The 2004 Jaguar S-Type is a beautifully engineered luxury sedan, but its fuel pump can become a weak point as the car ages. Recognizing the warning signs early—hard starting, stalling, whining noises, or poor acceleration—can save you from being stranded. Replacement costs through dealerships can be steep, but with a quality aftermarket pump and a little DIY effort, you can restore your S-Type’s performance for a fraction of the price.

If you’re in the market for a reliable replacement, consider a KEMSO fuel pump. With high-performance engineering, OEM replacement quality, and a lifetime warranty, it’s a smart investment for your vehicle. Visit https://www.kemsoracing.com/ today to find the right pump for your 2004 Jaguar S-Type—or any other vehicle in your garage. Their easy-to-navigate store, technical support, and customer reviews make ordering simple and confident.