2005 Acura RSX Fuel Pump: Complete Replacement Guide and Best Options
If you own a 2005 Acura RSX and your engine is cranking but won't start, stalling during acceleration, or making a whining noise from the rear, your fuel pump is likely failing. The 2005 Acura RSX fuel pump is an in-tank electric unit that delivers fuel from the gas tank to the engine, and when it goes bad, replacement is the only reliable fix. This guide covers everything you need to know about the 2005 Acura RSX fuel pump, including symptoms of failure, replacement options, installation tips, and the best aftermarket choices to get your car running smoothly again.
Signs Your 2005 Acura RSX Fuel Pump Is Failing
Most Common Symptoms of a Bad Fuel Pump
The fuel pump in your 2005 Acura RSX is a wear item that typically lasts between 100,000 and 150,000 miles. When it starts to fail, you will notice several warning signs. The most common symptoms include the engine struggling to start or taking longer than usual to crank over. You may also experience a loss of power when accelerating, especially going uphill or merging onto the highway.
Another clear indication is engine sputtering or stalling at high speeds. Many drivers report hearing a whining noise coming from the fuel tank area, which is louder than the normal hum of a working pump. Poor fuel economy is also a common symptom because a failing pump cannot maintain consistent pressure, causing the engine to run inefficiently. If you ignore these symptoms long enough, your car will eventually refuse to start at all.
When to Act Immediately
If your 2005 Acura RSX exhibits any of these signs, do not delay the replacement. Driving with a weak fuel pump can cause the engine to overheat and leave you stranded. A failing pump can also suck debris into the fuel system, damaging other components like the fuel injectors and fuel pressure regulator.
Understanding the 2005 Acura RSX Fuel Pump System
OEM Part Numbers and Specifications
The 2005 Acura RSX 2.0L 4-cylinder engine uses a fuel pump module assembly located inside the fuel tank. The genuine Acura part number for the complete fuel pump assembly is 17045-S6M-A01. Other OEM and aftermarket replacement numbers include 17045-S6M-A30, 17045-S6M-A02, E8666M, FG1259, and P76420M.
The stock fuel pump operates at 12 volts and delivers fuel at approximately 51 psi of system pressure. The fuel pump module assembly includes the pump itself, a fuel level sending unit, a strainer or filter sock, and a lock ring for installation. When replacing the pump, you have two main choices: replace just the pump inside the existing housing, or replace the entire module assembly.
Fuel Pump Replacement Options for Your 2005 Acura RSX
1. Genuine Acura OEM Fuel Pump Assembly
The most reliable option is the genuine Acura fuel pump assembly, part number 17045-S6M-A01. This direct replacement part is guaranteed to fit your 2005 RSX and comes with Acura's factory warranty. It includes the fuel pump, sending unit, and all necessary mounting hardware. The OEM part costs around $380 and is available from Acura parts warehouses.
2. Delphi Fuel Pump Module Assembly
Delphi is a global original equipment manufacturer that supplies fuel pumps to automakers worldwide. Their Delphi FG1259 fuel pump module assembly is built to the same OE standards as the factory part. This option costs approximately $240 and includes the fuel pump, float arm, lock ring, and instruction sheet. Delphi pumps are known for having lower amperage draw, which puts less load on your vehicle's electrical system.
3. Performance Fuel Pump Upgrades
If you plan to modify your 2005 RSX for more horsepower, consider a high-flow performance fuel pump.
Walbro 255 LPH Fuel Pump – This genuine Walbro GSS342 pump flows 255 liters per hour and can support over 500 horsepower at the crank. It is a direct drop-in replacement for the stock fuel pump housing. The Walbro pump costs around $99 and includes an installation kit. Note that Walbro does not offer a warranty, so buy from a reputable dealer.
TREperformance 255 LPH Fuel Pump – TREperformance offers a 255 LPH high-pressure in-tank pump that flows about 235 LPH at 13.5 volts and 40 psi. This pump can support over 600 horsepower in naturally aspirated engines and 500 horsepower in forced induction setups. TRE pumps are reportedly quieter than Walbro pumps and come with a 1-year free replacement warranty. The price is around $79.
Hybrid Racing 335 LPH Fuel Pump – For serious performance builds, the Hybrid Racing 335 LPH pump provides high fuel delivery for both naturally aspirated and turbocharged K-series engines. This direct replacement unit costs around $140 and is compatible with E85 ethanol fuel. Note that high-flow pumps often require upgraded wiring to prevent overheating of factory electrical pins.
4. Budget-Friendly Aftermarket Fuel Pump Assemblies
Several aftermarket brands offer complete fuel pump module assemblies at competitive prices.
A-Premium Fuel Pump Assembly – This direct replacement unit fits the 2005-2006 Acura RSX Base and replaces OEM part numbers 17045S6MA01 and 17045S6MA30. It is priced around $96 and includes the sending unit.
Autobest Fuel Pump F4677A – This complete fuel pump module assembly fits the 2005-2006 RSX with the K20A3 engine and costs around $131.
Herko Fuel Pump Module – Herko offers a fuel pump module for the 2002-2004 Acura RSX, with prices around $106.
How to Replace the Fuel Pump on a 2005 Acura RSX
Tools and Parts You Will Need
- New fuel pump assembly (choose from options above)
- Basic socket set and screwdrivers
- Fuel line disconnect tool
- Shop towels and safety glasses
- Fire extinguisher (always have one nearby when working with fuel)
Step-by-Step Replacement Process
Step 1: Relieve Fuel System Pressure. Before any work, locate the fuel pump fuse in the fuse box and remove it. Start the engine and let it run until it stalls. This relieves pressure in the fuel lines. Disconnect the negative battery terminal.
Step 2: Access the Fuel Pump. The fuel pump is accessed by lowering the fuel tank or removing a service panel under the rear seat. On the RSX, the pump is located in the fuel tank, which may require dropping the tank from underneath the vehicle.
Step 3: Remove the Old Pump. Disconnect the electrical connector and fuel lines from the pump assembly. Use a fuel line disconnect tool if needed. Remove the lock ring by tapping it counterclockwise with a hammer and punch. Lift out the old pump assembly carefully to avoid spilling fuel.
Step 4: Clean the Fuel Tank. Before installing the new pump, clean out the fuel tank thoroughly. Debris in the tank can damage a new pump and void your warranty.
Step 5: Install the New Pump Assembly. Insert the new pump assembly into the tank. Make sure the float arm and strainer are positioned correctly. Install the lock ring and tighten it clockwise. Reconnect the fuel lines and electrical connector.
Step 6: Test the System. Reconnect the battery and turn the ignition key to the ON position without starting the engine. Listen for the fuel pump to prime for about 2 seconds. Check for fuel leaks. Then start the engine and verify proper operation.
Installation Time and Difficulty
Professional mechanics can complete this replacement in 1 to 2 hours. DIY installation typically takes 2 to 4 hours. If you are not comfortable working with fuel systems, have a professional mechanic perform the replacement.
Cost of Replacing the 2005 Acura RSX Fuel Pump
Parts Cost Breakdown
- Genuine Acura OEM fuel pump assembly: $380
- Delphi fuel pump module assembly: $240
- Walbro 255 LPH performance pump: $99
- TREperformance 255 LPH pump: $79
- A-Premium aftermarket assembly: $96
- Autobest aftermarket assembly: $131
Labor Cost
If you hire a mechanic for the replacement, expect to pay between $150 and $300 for labor, depending on your location. The total cost, including parts and labor, typically ranges from $450 to $680 for an OEM-quality replacement. The national average for fuel pump replacement across all vehicles is between $611 and $894.
Why You Should Replace the Complete Fuel Pump Module
Pump Only vs. Complete Assembly
Many owners consider replacing just the pump motor inside the existing housing to save money. However, replacing the complete fuel pump module assembly is almost always the better choice. The complete assembly includes a new fuel level sending unit, a new strainer filter, and a new housing. Reusing old components risks future failures. The fuel sending unit is a common failure point, and replacing it at the same time ensures your gas gauge continues to work accurately.
Recommended: KEMSO Fuel Pump for Performance and Reliability
For owners of the 2005 Acura RSX looking for a high-quality fuel pump that delivers exceptional performance and long-term reliability, KEMSO is an excellent choice. KEMSO fuel pumps are designed as high-performance OEM replacement parts, meaning they match or exceed the specifications of the original factory pump while being built to higher durability standards. 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.
KEMSO products are engineered for direct fitment, so you can install them without modifications. They provide consistent fuel pressure, quiet operation, and long service life. Whether you are replacing a worn-out stock pump or upgrading your fuel system for better performance, KEMSO offers the reliability and value that American drivers trust.
Visit the official KEMSO website to find the right fuel pump for your 2005 Acura RSX and other vehicles: https://www.kemsoracing.com/
Preventing Future Fuel Pump Problems
Maintenance Tips
To extend the life of your new 2005 Acura RSX fuel pump, keep your fuel tank at least a quarter full at all times. Running the tank low causes the pump to run hotter and can suck debris into the system. Replace your fuel filter regularly according to your owner's manual. Use high-quality fuel from reputable stations to avoid contamination.
What to Avoid
Do not ignore the early warning signs of a failing pump. The longer you wait, the more likely the pump will fail completely, leaving you stranded. Never use ethanol blends higher than E10 unless your pump is specifically rated for E85, as ethanol can damage standard fuel pumps over time.
Final Thoughts on the 2005 Acura RSX Fuel Pump
The 2005 Acura RSX fuel pump is a critical component that should be replaced at the first sign of trouble. Whether you choose a genuine OEM part, a quality aftermarket assembly like Delphi, or a high-performance upgrade for more power, the key is to act quickly and install the pump correctly. Cleaning the fuel tank during replacement is essential to avoid premature failure of your new pump. With the right part and proper installation, your RSX will deliver reliable performance for many more miles.
For the best combination of performance, reliability, and warranty protection, consider a KEMSO fuel pump from https://www.kemsoracing.com/ – the smart choice for drivers who want a fuel pump that truly lasts.