2026-09-15
Lexus IS 250/300h High Mileage Guide – 100,000 km+ Malaysia
At 100,000 km, prioritise: IS 250 — walnut blast carbon cleaning (if not done), ATF change, 6 spark plugs, rear suspension arm inspection. IS 300h — inverter coolant flush, 4 spark plugs, wheel bearing inspection. Both: timing chain tension check, coolant flush, brake fluid, air filter. A well-maintained IS 250 runs reliably to 200,000 km+; the IS 300h is known to reach 300,000 km with proper care.
IS High Mileage Tips
- 100,000 km+: replace spark plugs, inspect valve cover gaskets, check ATF condition
- 150,000 km+: inspect timing chain tensioners, rear main seal, front suspension bushings
- Maintain 0W-20 full synthetic at 10,000 km intervals without exception
- IS 250: walnut blast every 20,000 km regardless of mileage milestone