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.
2021 Lexus RX 450h BaseFACTORY OEM SERVICE PROCEDURE
Timing Chain: Remove & Replace
| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| All Chains,w/Engine Oil Cooler | Includes: Disable and Enable High Voltage System. Includes: R&I Inverter and Converter Assembly. Includes: R&I Suspension Crossmember Assembly. DOES NOT include wheel alignment. | 21.2 | 15.7 | B |
| All Chains,w/o Engine Oil Cooler | Includes: Disable and Enable High Voltage System. Includes: R&I Inverter and Converter Assembly. Includes: R&I Suspension Crossmember Assembly. DOES NOT include wheel alignment. | 21.0 | 15.7 | B |
| Primary Drive Chain,w/Engine Oil Cooler | Includes: Disable and Enable High Voltage System. Includes: R&I Inverter and Converter Assembly. Includes: R&I Suspension Crossmember Assembly. DOES NOT include wheel alignment. | 20.8 | 17.6 | B |
| Primary Drive Chain,w/o Engine Oil Cooler | Includes: Disable and Enable High Voltage System. Includes: R&I Inverter and Converter Assembly. Includes: R&I Suspension Crossmember Assembly. DOES NOT include wheel alignment. | 20.6 | 17.6 | B |
| Combination Procedure: CRANKSHAFT GEAR OR SPROCKET: Remove & Replace: | ||||
| 0.2 | B | |||
| Combination Procedure: IDLER GEAR: Remove & Replace: | ||||
| 0.2 | B | |||
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.
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