Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2005 Lexus RX 330 FWDFACTORY OEM SERVICE PROCEDURE
Knock Sensor (3MZ-FE): Replacement
- DISCHARGE FUEL SYSTEM PRESSURE (See FUEL SYSTEM (3MZ-FE) )
- DRAIN ENGINE COOLANT (See ENGINE COOLANT (3MZ-FE) )
- REMOVE FR WIPER ARM LH (See WINDSHIELD WIPER MOTOR ASSY )
- REMOVE FR WIPER ARM RH (See WINDSHIELD WIPER MOTOR ASSY )
- REMOVE FRONT FENDER TO COWL SIDE SEAL LH
- REMOVE FRONT FENDER TO COWL SIDE SEAL RH
- REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSY (See WINDSHIELD WIPER MOTOR ASSY )
- REMOVE WINDSHIELD WIPER LINK ASSY (See WINDSHIELD WIPER MOTOR ASSY )
- REMOVE COWL TOP PANEL SUB-ASSY OUTER (See REPLACEMENT )
- REMOVE V-BANK COVER SUB-ASSY (See REPLACEMENT )
- REMOVE AIR CLEANER CAP SUB-ASSY (See REPLACEMENT )
- REMOVE EMISSION CONTROL VALVE SET (See REPLACEMENT )
- REMOVE INTAKE AIR SURGE TANK (See REPLACEMENT )
- REMOVE INTAKE MANIFOLD
- Disconnect the fuel pipe No. 1.
- Remove the EFI fuel pipe clamp.
- Pinch the tube connector and then pull out the fuel pipe No. 1.
- Disconnect the fuel pipe No. 1.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.