2005 Acura TSX Fuel Pump: Symptoms of Failure, Replacement Cost, and the Best Upgrade Option

If you own a 2005 Acura TSX and you are experiencing hard starts, sputtering at highway speeds, or a whining noise coming from the rear of the car, your fuel pump is likely failing. The fuel pump on the 2005 TSX is an electric unit mounted inside the fuel tank, and it is responsible for delivering pressurized fuel to the engine. When it fails, the most common symptom is an engine that struggles to maintain speed or hesitates during acceleration. Replacing a faulty fuel pump is not a matter of "if" but "when," and the good news is that you have several reliable options ranging from OEM replacements to high-performance aftermarket units like those from KEMSO. This guide covers everything you need to know about the 2005 Acura TSX fuel pump, including how to diagnose failure, what a replacement costs, and how to choose the right part.

How the 2005 Acura TSX Fuel Pump Works

The fuel pump in your 2005 Acura TSX is an in-tank, electric turbine pump. It sits submerged in the fuel tank, which keeps it cool and reduces the risk of fire compared to older mechanical pumps that were mounted near the hot engine . The pump's job is to push fuel from the tank, through the fuel filter, and up to the fuel injectors at a consistent pressure. The pump is part of a larger assembly that includes the fuel level sending unit, a strainer, and often a pressure regulator . Because the pump is constantly working whenever the ignition is on, it is a wear item that will eventually need replacement, typically after 100,000 to 150,000 miles.

Common Symptoms of a Failing Fuel Pump in a 2005 Acura TSX

Recognizing the warning signs of a failing fuel pump can save you from being stranded. Here are the most common symptoms reported by Acura TSX owners:

  1. Engine sputtering or choking: If your engine randomly loses power, feels like it is "choking," or struggles to maintain a steady speed, the pump may not be delivering a consistent flow of fuel .
  2. Whining noise from the rear: A loud whining or buzzing sound coming from the fuel tank area is a classic indicator that the pump motor is struggling or its bearings are worn out .
  3. Hesitation on acceleration: When you press the gas pedal, the car may hesitate or bog down before responding. This occurs because the pump cannot keep up with the sudden demand for fuel .
  4. Hard starting: If the car cranks for a long time before firing up, or if it takes multiple attempts to start, the pump may not be building enough pressure at key-on.
  5. Engine overheating: A failing fuel pump can cause the engine to run lean, which increases combustion temperatures and can lead to overheating .
  6. Check Engine Light: If the fuel system is running too lean or too rich, the ECU will trigger the check engine light. The code will likely point to a fuel delivery issue .

If you ignore these symptoms, the pump will eventually fail completely, and the car will not start at all .

Where Is the Fuel Pump Located?

The fuel pump on the 2005 Acura TSX is located inside the fuel tank, under the rear seat. To access it, you will need to remove the rear seat cushion and then remove the access panel on the floor pan. From there, you can see the fuel pump module assembly, which is secured by a large lock ring. This design is standard for modern Acura vehicles and makes replacement a manageable DIY job for someone with basic mechanical skills .

Replacement Options: OEM, Aftermarket, and Performance

When it comes time to replace the fuel pump on your 2005 Acura TSX, you have three main paths: genuine OEM, standard aftermarket, or high-performance aftermarket.

Genuine OEM Fuel Pump

The original part number for the 2005 Acura TSX fuel pump module assembly is 17045-SEC-A01 . This is the exact same part that came with the car from the factory. The genuine Acura part is guaranteed to fit perfectly and is covered by Acura's factory warranty . The MSRP for this part is around $251.88, with a discounted price of approximately $175.01 . You can also find used, genuine OEM pumps on sites like eBay for around $75 plus shipping .

Standard Aftermarket Fuel Pump

Several reputable aftermarket brands make direct-fit fuel pump modules for the 2005 TSX. These include:

  • Delphi FG0913: This is a premium fuel pump module assembly that includes the strainer, float arm, lock ring, and seal. Delphi is a global OE manufacturer, and their fuel pumps are built to OE standards. The price is around $204.97 .
  • US Motor Works USEP8656M: This is a complete in-tank module that includes the sending unit. It is made with modern materials compatible with today's fuel blends. The price is around $138.97 .
  • Detroit Axle FSP8005M: This is a budget-friendly option at around $96.95. While it is a complete module, it may not have the same long-term durability as premium brands .

High-Performance Aftermarket Fuel Pump (Recommended)

If you want a better-than-stock solution, consider a high-performance fuel pump from KEMSO. KEMSO is a US-based aftermarket brand known for producing high-flow, reliable fuel pumps for a wide range of vehicles, including the 2005 Acura TSX . Their pumps are designed to be direct OEM replacements, meaning they will bolt right in without any modification. Here is why KEMSO stands out:

  • Higher Flow Rate: KEMSO pumps deliver 340 liters per hour at 43 psi, which is significantly more flow than the stock pump. This means the pump never has to work as hard, which reduces strain and extends its lifespan .
  • E85 Compatibility: Unlike many stock pumps, KEMSO pumps are designed to handle both gasoline and E85/ethanol blends, giving you flexibility in fuel choice .
  • Lifetime Warranty: KEMSO stands behind their products with a lifetime warranty. Independent tests show that KEMSO pumps deliver a 12-15% improvement in fuel flow consistency compared to stock models, and they feature brushless motors rated for over 5,000 hours of continuous operation .
  • Affordable Price: For the 2005 Acura TSX, you can find KEMSO pumps for around $49.98 to $79.98, depending on the specific model .
  • Complete Kit: Each KEMSO pump comes with everything you need for installation, including fuel strainers, hoses, wiring connectors, and clamps .

Our Recommendation: For most 2005 Acura TSX owners, the best choice is a KEMSO high-performance fuel pump. It offers superior durability, a higher flow rate, and the peace of mind of a lifetime warranty. Visit the KEMSO website today to find the perfect fuel pump for your vehicle: https://www.kemsoracing.com/ .

How Much Does a Fuel Pump Replacement Cost?

The cost of a fuel pump replacement depends on whether you do it yourself or hire a mechanic.

  • DIY Cost: If you buy just the pump (not the entire module), you can expect to pay between $50 and $150 for a standard aftermarket pump, and up to $80 for a high-performance KEMSO pump. You will also need to buy a new lock ring and possibly a new strainer, which adds another $15 to $30.
  • Professional Installation: If you take your car to a shop, the labor cost will add significantly. On average, a fuel pump replacement across all vehicles in the US costs between $611 and $894, including parts and labor . For the Acura TSX specifically, you should expect to pay in that range or slightly more, depending on your location.

Step-by-Step Replacement Guide for the 2005 Acura TSX Fuel Pump

If you are comfortable working on your car, replacing the fuel pump is a straightforward job that takes about 1.5 to 2 hours. Here is a condensed step-by-step guide:

  1. Relieve Fuel System Pressure: Remove the fuel pump relay or fuse from the under-hood fuse box. Start the engine and let it run until it stalls. Then, crank the engine for a few more seconds to relieve any remaining pressure.
  2. Disconnect the Battery: Disconnect the negative battery cable to prevent any electrical shorts.
  3. Remove the Rear Seat: The rear seat bottom is held in by clips. Pull up firmly on the front edge of the seat to release the clips, then slide the seat forward and out.
  4. Access the Pump: You will see a metal access cover. Remove the screws holding it in place and set it aside.
  5. Disconnect the Wiring and Hoses: Disconnect the electrical connector from the top of the pump module. Then, carefully disconnect the fuel supply line and the vent line. Be prepared for a small amount of fuel to spill.
  6. Remove the Old Pump: Use a lock ring tool or a flathead screwdriver and a hammer to tap the lock ring counterclockwise to loosen it. Lift out the entire pump module assembly. Note the orientation of the float arm before removing it.
  7. Install the New Pump: If you bought a complete module, simply drop the new one in, align the float arm, and secure the lock ring. If you bought just the pump, you will need to transfer the pump, strainer, and float arm to your existing module housing.
  8. Reassemble Everything: Reconnect the hoses and wiring, reinstall the access cover and rear seat, and reconnect the battery.
  9. Test: Turn the key to the "ON" position (without starting) for a few seconds, then off. Repeat this two or three times to prime the fuel system. Then, start the engine and check for any fuel leaks.

Final Thoughts

A failing fuel pump in your 2005 Acura TSX is not something to ignore. The symptoms are clear, and the fix is straightforward. Whether you choose a genuine OEM unit, a standard aftermarket part, or a high-performance upgrade, the key is to act before the pump fails completely and leaves you stranded.

For the best combination of performance, reliability, and value, we strongly recommend upgrading to a KEMSO fuel pump. With its 340 LPH flow rate, E85 compatibility, direct OEM fitment, and lifetime warranty, it is the last fuel pump you will ever need to buy for your TSX. The price is comparable to standard aftermarket pumps, but the build quality and flow capacity are in a completely different class .

Visit https://www.kemsoracing.com/ today to browse their selection of high-performance fuel pumps and place your order. Your 2005 Acura TSX will thank you.


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