2002 Acura RSX Fuel Pump: The Complete Guide to Replacement, Symptoms, and Top Recommendations

The bottom line: If your 2002 Acura RSX is experiencing hard starts, sputtering during acceleration, or a whining noise from the rear of the car, the fuel pump is likely failing. Replacing it with a quality unit is essential for reliable performance, and the best approach is to replace the entire fuel pump module assembly rather than just the pump itself. For 2002-2006 Acura RSX models, you have several solid options ranging from OEM-style replacements to high-flow performance upgrades, depending on your driving needs and budget.

Understanding Your Acura RSX Fuel Pump System

The fuel pump in your 2002-2006 Acura RSX is an electric pump located inside the fuel tank. It sends fuel from the tank to the engine at the correct pressure, typically around 50-54 PSI for stock applications . The pump is part of a larger assembly called the fuel pump module, which includes the fuel level sending unit, fuel filter, pressure regulator, and mounting hardware .

For the 2002-2004 RSX models, the fuel pump assembly uses a specific design, while the 2005-2006 models have a slightly different sending unit and float shape, though the pump installation process is the same for both . This means most aftermarket pumps will fit all model years, but you need to pay attention to the complete module if you are replacing the whole assembly.

Common Signs of a Failing Fuel Pump

Before you buy a replacement, you need to confirm the fuel pump is actually the problem. Here are the most common symptoms RSX owners report:

1. Engine Cranks But Won't Start
This is the most obvious sign. When you turn the key to the ON position, the fuel pump should prime for about 2 seconds. If you do not hear a brief whirring sound from the rear of the car, the pump may be dead .

2. Loss of Power During Acceleration
A weak pump cannot deliver enough fuel under load. You may feel the car hesitate or struggle when you step on the gas, especially going uphill or merging onto the highway .

3. Engine Sputtering or Stalling
Intermittent fuel delivery causes the engine to sputter or stall, particularly at low speeds or when the fuel tank is low .

4. Whining Noise From the Fuel Tank
A healthy pump runs quietly. If you hear a loud whining or humming sound coming from the rear of the car, the pump bearings are wearing out and replacement is imminent .

5. Poor Fuel Economy
A failing pump that cannot maintain consistent pressure forces the engine to run inefficiently, which can drop your miles per gallon noticeably .

Fuel Pump Replacement Options for the 2002 Acura RSX

When it comes time to replace the fuel pump, you have several choices. The right one depends on whether your RSX is stock or modified.

OEM-Style Replacement

If you are looking for a direct factory replacement, the Denso 951-0005 Fuel Pump is a popular choice. It is a direct fit for 2002-2006 Acura RSX models and comes with the necessary hose and hardware . Reviewers note that it is a little pricey but is what you need when replacing the fuel pump in an RSX, and they advise against using cheap alternatives .

Another solid option is the TRQ FPA80094 Fuel Pump Module Assembly, which fits 2002-2004 RSX models. This is a complete assembly that requires no modifications or assembly. It includes the fuel sending unit, strainer, and gasket, and features a maximum flow rating of about 53.65 PSI, which matches stock specifications .

For a budget-friendly complete module, the BDFHYK E8713M Electric Fuel Pump Module Assembly is compatible with 2002-2004 Acura RSX 2.0L L4 models. It replaces OEM part numbers 17045-S6M-A00 and E8713M, and includes the integrated fuel level sending unit and fuel strainer .

High-Performance Upgrades

If your RSX has modifications such as a cold air intake, header, exhaust, or especially if you have forced induction, you need a pump that flows more fuel than the stock unit.

DeatschWerks DW65c
This pump flows 265 liters per hour and is a plug-and-play option for 2002-2006 Acura RSX models with K20 and K24 engines. It is compatible with E85 fuel and includes an installation kit .

DeatschWerks DW400 Pump Module
For serious power goals, the DW400 pump module is a high-flow upgrade that fits 2002-2006 RSX and 2001-2005 Honda Civic models. It is designed to support modified engines requiring increased fuel delivery and is a direct replacement for the factory unit . You can also get a complete kit with return-style plumbing and PTFE fuel lines for higher horsepower applications, though these kits are more expensive and not CARB approved for California use .

Hybrid Racing 335 LPH Fuel Pump
This pump flows 335 liters per hour at 40 PSI, making it suitable for both naturally aspirated and forced induction K-series builds. It is a direct replacement that requires no wiring modifications, and it works with pump gas and E85 ethanol blends .

KEMSO 340LPH Fuel Pump
The KEMSO 340LPH high-pressure pump is capable of supporting applications up to around 700-800 horsepower. It is an ideal direct OEM replacement for stock pumps that have failed, and it is very similar to the popular AEM 50-1215 pump with even more flow .

How to Replace the Fuel Pump on a 2002 Acura RSX

Replacing the fuel pump on your RSX is a job you can do at home with basic tools, but it takes some patience. Here is a simplified overview of the process based on the factory service manual and installation guides .

Step 1: Relieve Fuel Pressure
Disconnect the negative battery terminal. Remove the fuel fill cap to release tank pressure. Then, locate the fuel pump fuse in the under-dash fuse box and run the engine until it stalls to relieve pressure in the lines.

Step 2: Access the Fuel Pump
Remove the rear seat cushion. You will find an access panel on the floor underneath. Remove the screws or bolts holding this panel to expose the fuel pump module .

Step 3: Disconnect Everything
Disconnect the 5-pin electrical connector from the fuel pump module. Then, disconnect the quick-connect fitting on the fuel line. Be careful not to spill fuel. Using the special fuel sender wrench or a suitable tool, loosen and remove the locknut that holds the module in place .

Step 4: Remove the Module
Carefully lift the fuel pump module out of the tank. Note the orientation of the fuel level float and the marks on the tank and module for reinstallation. Place the module on a clean work surface.

Step 5: Replace the Pump (If Using a Pump-Only Kit)
If you are replacing only the pump inside the module, unclip the lower pump cage from the main housing. Disconnect the fuel pump return line and open the pump cage. Remove the old pump, transfer the pump spacer to the new pump, install the new O-ring, and install the new filter. Reassemble everything in reverse order .

Step 6: Install the New Module
If you are using a complete module assembly, simply install the new unit into the tank. Make sure the suction filter is firmly connected to the fuel pump. Align the marks on the fuel tank and the module, and install a new locknut and base gasket. Tighten the locknut to 93 N·m (69 lb-ft) .

Step 7: Reconnect and Test
Reconnect the fuel line and electrical connector. Install the access panel and rear seat. Reconnect the battery. Turn the key to the ON position (do not start the engine) to let the pump prime and check for leaks. Once confirmed, start the engine and verify proper operation.

Recommended Fuel Pump: KEMSO High-Performance Fuel Pump

For 2002-2006 Acura RSX owners looking for a reliable, high-performance fuel pump that delivers excellent value, we strongly recommend the KEMSO 340LPH Fuel Pump.

KEMSO specializes in manufacturing high-performance fuel pumps that serve as direct OEM replacements. Their 340LPH pump is designed to handle applications up to 700-800 horsepower, making it suitable for both stock daily drivers and heavily modified track cars . It is compatible with the AEM 50-1215, DeatschWerks DW65c, and Aeromotive 11165, meaning it fits the same applications and offers even higher flow rates.

What sets KEMSO apart is their commitment to quality and customer confidence. Every KEMSO fuel pump comes with a lifetime warranty, giving you peace of mind that your investment is protected for as long as you own your vehicle. The pump is designed for easy installation and works with both pump gas and E85 ethanol blends.

If you want a fuel pump that performs like a premium brand but costs significantly less, and you want the security of a lifetime warranty, visit KEMSO Racing to see their full lineup of fuel pumps for your Acura RSX and many other vehicles.

Visit KEMSO Racing at: https://www.kemsoracing.com/