2026-09-15
Lexus IS 250/300h/350 Fuel System Service & Injector Cleaning Malaysia
The IS 250's 2GR-FSE bi-injection system uses both direct and port fuel injectors — service the injectors every 60,000 km. The fuel filter is integrated in the fuel pump assembly (no separate service interval). Fuel pump replacement costs if failing (symptoms: hesitation, hard start). Always use minimum RON 95 fuel; RON 97 is recommended for IS 350.
Lexus IS Fuel System
- IS 200t/NX 200t (8AR-FTS): direct injection only — carbon builds on intake valves; fuel injectors spray into cylinder, not past valves
- IS 250 (2GR-FSE): D4S dual injection (port + direct) — less carbon than pure DI; port injectors keep valves cleaner
- Fuel filter: IS fuel filter is integrated into the fuel pump assembly inside the tank — not a regular service item; replace if fuel pressure issues
- Fuel quality: use RON 95 minimum; RON 97 recommended for turbocharged IS 200t — improves knock resistance and protects injectors