2026-09-15
Lexus IS 250/300h/350 Timing Chain – No Belt Required
All IS variants use an oil-lubricated timing chain — there is no timing belt to replace. The 2GR-FSE (IS 250/350) and 2AR-FXE (IS 300h) timing chains are designed to last the engine's lifetime with regular oil changes. Skipping oil changes is the number one cause of premature chain stretch and tensioner wear. If you hear rattling on cold starts, have the chain tension checked immediately.
IS Timing Chain
The 2GR-FSE and 2GR-FE engines use timing chains rated for engine life. With 0W-20 full synthetic at 10,000 km intervals and proper VVT maintenance, the chains are trouble-free. D-4S dual injection reduces DI carbon but VVT passages still need clean oil — do not stretch oil change intervals beyond 10,000 km.