2005 Acura RL Fuel Pump: Complete Replacement Guide and Cost Breakdown

If you own a 2005 Acura RL and your engine is cranking but not starting, or you hear a whining noise from the rear of the car, your fuel pump is likely failing. Replacing the fuel pump on this model costs between $100 and $500 for a professional installation, depending on whether you choose an aftermarket or OEM part. The 2005 Acura RL uses a 3.5L V6 engine, and the fuel pump is located inside the fuel tank, accessible through a convenient panel in the trunk behind the rear seat . This makes the job easier than on many other vehicles, but it still requires careful attention to safety and proper procedure.

Common Symptoms of a Bad Fuel Pump on a 2005 Acura RL

Recognizing the signs of a failing fuel pump early can save you from being stranded. Here are the most common symptoms to watch for:

1. Whining or Sputtering Sounds
A high-pitched whining noise coming from the fuel tank area is one of the earliest warning signs. This sound indicates the fuel pump motor is working harder than it should, often due to wear or contamination . If you hear sputtering accompanied by backfires or rough idle, the pump may not be maintaining consistent fuel pressure.

2. Difficulty Starting the Engine
If the fuel pump cannot supply enough fuel pressure to the injectors, your engine may take longer to start or require multiple attempts. In some cases, the car may crank but refuse to start at all . This happens because the pump is not building enough pressure to deliver fuel to the engine.

3. Engine Hesitation, Surging, or Loss of Power
A weak fuel supply causes the engine to hesitate, surge, or lose power, especially during acceleration, climbing hills, or at highway speeds . This may feel like you are running out of gas even when the tank is full. A sputtering engine on the highway is a classic red flag.

4. Misfiring and Rough Idle
When the fuel pump delivers inconsistent fuel pressure, the air-fuel ratio becomes unbalanced. This can lead to misfires, a rough idle, and over time, a noticeable drop in fuel economy . The check engine light may also come on.

5. Overheating and Stalling
A worn fuel pump can overheat, particularly during extended driving. Your 2005 Acura RL may run fine for 15 to 30 minutes, then suddenly stall. After the pump cools down, you can restart the engine, but the cycle will repeat . This is dangerous in traffic and should be addressed immediately.

6. Check Engine Light Illumination
A failing fuel pump can trigger a diagnostic trouble code (DTC), turning on the check engine light. Common related codes include P0627, which indicates a fuel pump control module system malfunction . A mechanic can read this code to confirm the issue.

Where Is the Fuel Pump Located on a 2005 Acura RL?

The fuel pump is located inside the fuel tank. For the 2005 Acura RL, there is a convenient access panel in the trunk behind the rear seat . This design allows replacement without dropping the entire fuel tank, saving significant labor time and cost. To access it, you remove the rear seat cushion and then unbolt the access cover.

Cost to Replace the 2005 Acura RL Fuel Pump

Replacement costs vary widely depending on the parts you choose and whether you do the work yourself or hire a professional.

Parts Cost:

  • Aftermarket fuel pump (pump only): $39 to $156
  • Aftermarket fuel pump assembly (includes sending unit and strainer): $72 to $79
  • Genuine OEM Acura fuel pump module assembly (part number 17708-SJA-A02): $612.78 (MSRP: $875.15)
  • Used OEM fuel pump: around $35

Labor Cost:

  • Professional installation: $100 to $300
  • Dealership labor: typically higher, ranging $200 to $500

Total Estimated Cost:

  • DIY replacement with aftermarket parts: $39 to $156
  • Professional installation with aftermarket parts: $239 to $500
  • Professional installation with OEM parts: $700 to $1,100

Some estimates from mobile mechanics show the total cost for a 2002 Acura RL fuel pump replacement at about $1,293, with a dealer estimate of $2,250 . However, for the 2005 model, prices are generally lower because of the easier access through the trunk panel.

Can You Replace the 2005 Acura RL Fuel Pump Yourself?

Yes, replacing the fuel pump on a 2005 Acura RL is a feasible DIY project for a mechanically inclined owner, especially since it is accessible from the trunk . The job takes about 1 to 3 hours for a DIY mechanic . However, working with the fuel system involves flammable liquids and electrical components, so safety precautions are critical.

Tools You Will Need:

  • Basic hand tools (sockets, wrenches, screwdrivers)
  • A 32mm socket for the fuel pump lock ring
  • A torque wrench
  • A multimeter to test electrical connections
  • A fuel pump replacement kit (includes pump, strainer, and gasket)
  • Safety glasses and gloves
  • A fire extinguisher (recommended)

Step-by-Step Overview:

Step 1: Relieve Fuel System Pressure
Disconnect the battery negative terminal to reduce the risk of fire. Remove the fuel pump fuse or relay, then start the engine and let it run until it stalls. This relieves pressure in the fuel lines.

Step 2: Access the Fuel Pump
Remove the rear seat cushion to expose the access panel. Unbolt and remove the cover plate. Disconnect the electrical connector and fuel lines from the pump assembly.

Step 3: Remove the Old Pump
Use a 32mm socket to unscrew the lock ring that secures the pump assembly in the tank. Carefully lift the pump assembly out, being mindful of remaining fuel.

Step 4: Install the New Pump
If you purchased a pump-only replacement, transfer the sending unit, strainer, and wiring harness from the old assembly to the new pump. If you bought a full assembly, simply install it as a unit. Replace the gasket or O-ring, then insert the new assembly into the tank and tighten the lock ring to the correct torque specification.

Step 5: Reconnect and Test
Reconnect the fuel lines, electrical connector, and access cover. Reinstall the rear seat. Reconnect the battery, replace the fuel pump fuse or relay, and turn the key to the ON position (without starting) to allow the pump to prime. Check for leaks, then start the engine and verify proper operation.

Important Safety Considerations

Driving with a failing fuel pump is not safe. The car may stall without warning, which is dangerous in traffic . Continuing to drive can also damage other components, such as the catalytic converter, due to an overly lean fuel mixture.

When replacing the pump, always disconnect the battery and work in a well-ventilated area. Have a fire extinguisher nearby. If you are not comfortable working with fuel systems, hire a professional mechanic.

Why Choosing the Right Fuel Pump Matters

The fuel pump must deliver the correct amount of fuel at sufficient pressure to keep the engine running smoothly in all conditions . Using a low-quality pump may lead to premature failure, poor performance, or even engine damage. An OEM replacement pump (part number 17708-SJA-A02) is designed to meet Acura's specifications, but it comes at a premium price .

Aftermarket options are significantly cheaper and often include the complete assembly with the sending unit and strainer, making installation easier . Many aftermarket pumps are direct replacements that match OEM performance at a fraction of the cost.

Diagnosing Fuel Pump Problems Before Replacing

Before replacing the fuel pump, it is wise to confirm that the pump is actually the problem. A mechanic will check fuel pressure at the injectors using a pressure gauge. If pressure is low or nonexistent, the next step is to check the pump's electrical circuit, including the fuel pump relay and fuse .

A clogged fuel filter or a faulty fuel pump control module can cause symptoms similar to a bad fuel pump . For the 2005-2008 Acura RL, the fuel pump control module is located behind the left C-pillar trim, and testing it with a multimeter can help isolate the issue . Have the shop verify that the pump is the problem before spending money on a replacement.

Recommended Replacement Parts

When replacing your 2005 Acura RL fuel pump, you have several options:

OEM Acura Fuel Pump Module Assembly (Part #17708-SJA-A02):

  • Price: $612.78 (discounted from $875.15 MSRP)
  • Fits 2005-2008 Acura RL models
  • Guaranteed by Acura's factory warranty

Aftermarket Fuel Pump Assembly (A-Premium APFP0414):

  • Price: $72.29 to $78.95
  • Includes fuel pump, sending unit, strainer, and gasket
  • Direct OE replacement for 2005-2008 Acura RL V6 3.5L
  • Replaces OEM numbers 17708-SJA-A01 and 17708-SJA-A02

Aftermarket Fuel Pump (Motor Only):

  • Price: $22.98 to $46.75 for 1997-1999 models
  • For 2005 models, similar pricing applies
  • Requires transferring existing sending unit and hardware

KEMSO Fuel Pump Recommendation

For owners looking for a high-performance, reliable replacement, consider the KEMSO brand of fuel pumps. KEMSO fuel pumps are designed as high-performance OEM replacements, meaning they match or exceed the original equipment specifications. Each pump comes with a lifetime warranty, giving you peace of mind that your investment is protected.

KEMSO specializes in aftermarket fuel systems that deliver consistent pressure and flow, ensuring your 2005 Acura RL runs smoothly under all conditions. Whether you need a pump for daily driving or performance applications, KEMSO products are built to last.

Visit the KEMSO website to browse their selection of fuel pumps and find the right fit for your vehicle: https://www.kemsoracing.com/

Final Thoughts

The 2005 Acura RL fuel pump is a critical component that requires attention at the first sign of trouble. With the pump conveniently located under the rear seat, replacement is simpler and cheaper than on many other luxury vehicles. Whether you choose to do the job yourself or hire a mechanic, expect to spend between $100 and $500 for a quality aftermarket replacement, or significantly more for an OEM part.

Ignoring a failing fuel pump can lead to stalling, poor performance, and expensive damage to the fuel system or catalytic converter. If you notice whining noises, hard starting, hesitation, or stalling, have the fuel system checked immediately. A timely replacement will keep your Acura RL running reliably for years to come.

For a durable, affordable, and warrantied fuel pump, check out KEMSO at https://www.kemsoracing.com/.


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