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.
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HOMESERVICE MANUALSLEXUS2006RX 400H AWD V6-3.3L (3MZ-FE) HYBRIDREPAIR AND DIAGNOSISMAINTENANCESERVICE AND REPAIRENGINE
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) Hybrid
Engine
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION Engine
ON-VEHICLE INSPECTION
HINT: Inspect these items when the engine is cold.
1. REPLACE TIMING BELT
2. INSPECT DRIVE BELT
3. REPLACE SPARK PLUGS
4. Canada: INSPECT AIR FILTER
a. Remove the air filter.
b. Visually check that the air filter is not excessively damaged or oily.
HINT: Oiliness may indicate that the PCV valve is stuck.
If necessary, replace the air filter.
c. Clean the filter with compressed air.
First blow from the inside thoroughly, and then blow from the outside of the filter.
d. Reinstall the air filter.
5. REPLACE AIR FILTER
a. Replace the air filter with a new one.
6. REPLACE ENGINE OIL AND OIL FILTER
7. REPLACE ENGINE COOLANT AND INSPECT RADIATOR FIN.
a. Check that the radiator and condenser are not blocked with leaves, dirt, or insets, and clean the hose connection.
8. INSPECT GASKET IN FUEL TANK CAP
9. California, Massachusetts and New York: INSPECT CHARCOAL CANISTER
10. INSPECT FUEL LINES AND CONNECTIONS, FUEL TANK VAPOR VENT SYSTEM HOSES AND FUEL TANK BANDS
a. Visually check the fuel lines for cracks, leakage, loose connections, deformation or tank band looseness.
11. INSPECT EXHAUST PIPES AND MOUNTINGS
a. Visually check the pipes, hangers and connections for severe corrosion, leaks or damage.
12. INSPECT VALVE CLEARANCE
HINT: Inspect these items when the engine is cold.
1. REPLACE TIMING BELT
2. INSPECT DRIVE BELT
3. REPLACE SPARK PLUGS
4. Canada: INSPECT AIR FILTER
a. Remove the air filter.
b. Visually check that the air filter is not excessively damaged or oily.
HINT: Oiliness may indicate that the PCV valve is stuck.
If necessary, replace the air filter.
c. Clean the filter with compressed air.
First blow from the inside thoroughly, and then blow from the outside of the filter.
d. Reinstall the air filter.
5. REPLACE AIR FILTER
a. Replace the air filter with a new one.
6. REPLACE ENGINE OIL AND OIL FILTER
7. REPLACE ENGINE COOLANT AND INSPECT RADIATOR FIN.
a. Check that the radiator and condenser are not blocked with leaves, dirt, or insets, and clean the hose connection.
8. INSPECT GASKET IN FUEL TANK CAP
9. California, Massachusetts and New York: INSPECT CHARCOAL CANISTER
10. INSPECT FUEL LINES AND CONNECTIONS, FUEL TANK VAPOR VENT SYSTEM HOSES AND FUEL TANK BANDS
a. Visually check the fuel lines for cracks, leakage, loose connections, deformation or tank band looseness.
11. INSPECT EXHAUST PIPES AND MOUNTINGS
a. Visually check the pipes, hangers and connections for severe corrosion, leaks or damage.
12. INSPECT VALVE CLEARANCE
RENDER: 1.0x
NO RELATED
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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.