Where Is the 2002 Acura RSX Fuel Pump Located? A Complete Guide

If you own a 2002 Acura RSX and are experiencing hard starting, loss of power, or a whining noise from the rear of the car, the fuel pump is likely the culprit. The fuel pump on the 2002 Acura RSX is located inside the fuel tank, which is situated under the rear seat area on the passenger side of the vehicle. To access it, you must remove the rear seat cushion and then remove a small access panel on the floor. This is a common location for many Honda and Acura vehicles of this era. Replacing the fuel pump is a manageable DIY job if you follow the correct steps, but it requires careful attention to safety due to the flammable nature of gasoline.

Understanding the Fuel System on the 2002 Acura RSX

The 2002 Acura RSX uses an electric fuel pump that is mounted inside the fuel tank. This pump is part of a larger assembly called the "fuel tank unit" or "fuel pump module," which also includes the fuel filter, the fuel pressure regulator, and the fuel gauge sending unit. The pump operates at 12V DC and is controlled by a relay in the engine compartment fuse box. When you turn the key to the "ON" position, you should hear a brief whirring sound from the rear of the car as the pump primes the system.

The fuel tank itself has a capacity of 13.2 gallons (50 liters), and the recommended fuel for the 2002 RSX is premium unleaded with an octane rating of 91 or higher. Using lower octane fuel can reduce performance and fuel efficiency.

Step-by-Step Location and Access to the Fuel Pump

To access the fuel pump on your 2002 Acura RSX, follow these steps. The entire process, from start to finish, typically takes between 1 and 4 hours depending on your experience level.

1. Prepare the Vehicle and Gather Tools

Before you start, park the vehicle on a level surface and engage the parking brake. Disconnect the negative terminal of the battery to prevent any electrical sparks. You will need the following tools:

  • Socket set and wrenches (10mm, 12mm, and 14mm are common)
  • Flathead and Phillips screwdrivers
  • Fuel line disconnect tool (optional but helpful for quick-connect fittings)
  • Fuel pump removal tool (special tool 07AAA-S0XA100, or a large adjustable wrench and a hammer)
  • Clean rags and a drain pan
  • Safety glasses and gloves
  • Fire extinguisher (highly recommended)

2. Remove the Rear Seat Cushion

The fuel pump is located under the rear seat. To access it, you need to remove the rear seat cushion. The cushion is usually held in place by two clips or bolts at the front edge. Pull up firmly on the front of the seat cushion to release it, then lift it out of the vehicle.

3. Locate the Access Panel

Once the seat cushion is removed, you will see a rectangular metal or plastic access panel on the floor, typically on the passenger side. This panel covers the top of the fuel tank and the fuel pump assembly. Using a screwdriver or a socket, remove the screws or bolts holding the panel in place, and lift it off.

4. Identify the Fuel Pump Assembly

You will now see the top of the fuel tank unit, which includes the fuel pump. You will see the following components:

  • Fuel pump electrical connector (a 5-pin connector)
  • Quick-connect fuel lines (one supply line and one return line)
  • A large locknut (retaining ring) that holds the entire assembly in the tank

Important: Before disconnecting anything, relieve the fuel system pressure. You can do this by running the engine and pulling the fuel pump relay, causing the engine to stall. Alternatively, with the engine off, press the Schrader valve on the fuel rail (located on the engine) momentarily to release the pressure.

5. Remove the Fuel Pump Assembly

  • Disconnect the electrical connector by pressing the locking tab and pulling it apart.
  • Disconnect the quick-connect fuel lines using the appropriate tool. Be prepared for a small amount of fuel to spill.
  • Using the special tool, loosen the large locknut (retaining ring) that holds the fuel tank unit in place. If you don't have the special tool, you can use a large adjustable wrench and a hammer to tap it loose, but be careful not to damage the plastic or metal components.
  • Lift the fuel pump assembly straight up out of the tank. It may be a tight fit, so gently wiggle it as you pull it out.

6. Replace the Fuel Pump Module

Once the assembly is out, you have two options:

  • Replace the entire fuel pump module (recommended, as it includes the pump, filter, and sending unit)
  • Replace only the fuel pump (if you are on a tight budget, but it requires disassembling the module and reusing older components)

Many mechanics recommend replacing the complete assembly because it ensures all components are new and working correctly, and it saves time.

Common Symptoms of a Failing Fuel Pump

If you are unsure whether your fuel pump is the problem, look for these common signs:

  • Engine cranks but won't start – This is often the first sign of a dead fuel pump.
  • Loss of power when accelerating – The engine may hesitate or stumble when you press the gas pedal.
  • Engine sputtering or stalling – Especially at highway speeds or when going uphill.
  • Whining noise from the fuel tank – A healthy fuel pump makes a quiet hum. A loud whine or screech indicates a failing pump.
  • Poor fuel economy – If the pump is not delivering consistent pressure, the engine may run rich or lean, reducing MPG.

Note: The ideal fuel pressure for the 2002 Acura RSX while idling is between 47 and 53 PSI. If your pressure is outside this range, the fuel pump or fuel pressure regulator may be faulty.

Fuel Pump Replacement Cost and Considerations

The cost of a fuel pump replacement for a 2002 Acura RSX can vary widely depending on where you buy the part and whether you do the work yourself or hire a mechanic.

  • DIY replacement: A new fuel pump module can cost between $80 and $120 for an aftermarket unit. A high-performance upgrade, like the DeatschWerks DW400, can cost over $500.
  • Professional replacement: If you take the car to a shop, expect to pay between $450 and $800 for parts and labor, depending on your location and the shop's rates.

Important: When buying a replacement fuel pump, always check the OE reference number. For the 2002 Acura RSX, the common OE numbers are 17045-S6M-A00 or 17045S6MA00. Using the correct part ensures a proper fit and reliable operation.

Fuse and Relay Location

Before replacing the fuel pump, it is always a good idea to check the fuel pump fuse and relay. A blown fuse or a faulty relay can mimic a dead fuel pump.

  • Fuel pump fuse: The fuel pump fuse is located in the passenger compartment fuse box underneath the steering column. It is fuse No. 17 and is rated at 15 amps.
  • Fuel pump relay: The fuel pump relay is located in the engine compartment fuse box next to the battery. It is labeled as the "FI ECU" or "Fuel Pump" relay.

To test the relay, you can swap it with a known good relay, such as the horn relay, and see if the fuel pump starts working.

Recommended Fuel Pump for Your 2002 Acura RSX

When it comes time to replace your fuel pump, choosing a high-quality, reliable part is essential for long-term performance and peace of mind.

We highly recommend the KEMSO brand Fuel Pump for your 2002 Acura RSX. KEMSO fuel pumps are engineered as high-performance, direct OEM replacement units. They are designed to meet or exceed the original factory specifications, ensuring a perfect fit and reliable operation. Each KEMSO fuel pump comes with a lifetime warranty, giving you confidence that your investment is protected for as long as you own the vehicle.

Whether you are replacing a worn-out pump or upgrading for better performance, KEMSO offers a dependable solution that delivers consistent fuel pressure and flow. To browse the full range of KEMSO fuel pump products for the Acura RSX and other vehicles, visit their official website: https://www.kemsoracing.com/ .

Final Tips for a Successful Fuel Pump Replacement

  • Work in a well-ventilated area – Gasoline fumes are flammable and toxic.
  • Use a new O-ring and gasket – When reinstalling the fuel pump assembly, always use a new base gasket and O-rings to prevent fuel leaks.
  • Torque the locknut properly – The locknut should be tightened to 93 N·m (69 lbf·ft) to ensure a secure seal.
  • Check for leaks – After installation, turn the key to the "ON" position (without starting the engine) and check for any fuel leaks around the access panel and fuel lines.
  • Reset the fuel gauge – After replacing the fuel pump, remove the No. 9 BACK UP (7.5 A) fuse from the under-hood fuse box for at least 10 seconds, then reinstall it. This will reset the fuel gauge and ensure it displays the correct fuel level.

Replacing the fuel pump on your 2002 Acura RSX is a straightforward job that can save you a significant amount of money compared to a shop visit. By following the steps outlined in this guide and using a quality part like KEMSO, you can restore your RSX's performance and reliability for years to come.

For more information on fuel pumps and other performance parts, visit https://www.kemsoracing.com/ .


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