2026-09-15
Lexus RX 270/350/450h Timing Chain – No Belt Required
All RX variants use an oil-lubricated timing chain — no timing belt replacement ever. The 2GR-FE/2GR-FXE (RX 350/450h) and 2AR-FE (RX 270) chains are designed to last the engine's lifetime with correct oil maintenance. Using 5W-30 full synthetic and changing every 10,000 km prevents chain stretch and tensioner wear. Eliminates timing belt service costs.
RX Timing Chain
The RX 350 2GR-FE and 2GR-FKS, and the RX 450h 2GR-FXE all use timing chains. These 3.5L V6 engines have dual timing chains (primary and secondary) and are very robust. With 0W-20 full synthetic changed every 10,000 km, the chains will typically last the life of the engine without issue. If you hear chain rattle on a high-mileage RX, check oil level first — low oil is the most common cause.