The fuel injectors transfers gas from the tank into the engine cylinders to provide power for the vehicle. If you have a bad fuel injector, your vehicle will likely have poor gas mileage, lose power, or have misfires. Fitments: 2000-2002 Chevrolet Prizm 1.8L 2003-2006 Pontiac Vibe 1.8L 2000-2005 Toyota Celica 1.8L 2000-2004 Toyota Corolla 1.8L 2003-2006 Toyota Matrix 1.8L 2000-2005 Toyota MR2 Spyder 1.8L 1995 Toyota MR2 2.0L Replaces Part Numbers: FJ415 23250-0D040, 23250-22040, 232500D040 Fuel Injector Installation Procedure: Preparation: Ensure engine is off and fuel system pressure is released. Remove Old Injector: Disconnect electrical connector and fuel line, then take out the old injector. Check Components: Inspect O-rings and replace if damaged. Install New Injector: Apply a thin coat of clean engine oil to O-rings and insert the injector into the fuel rail/port. Reconnect: Attach fuel line and electrical connector securely. Test: Start the engine and check for leaks or abnormal operation. Quality Guarantee: 12-Month Warranty At Gledewen, we take pride in the quality of our products and in your satisfaction. If you have any problems, do not hesitate to contact us.