2026-09-15
Lexus ES 250/300h Catalytic Converter Replacement Malaysia
The ES 4-cylinder has a single catalytic converter. Failure before 150,000 km is very rare with proper oil and fuel maintenance. If the ES 300h runs exclusively on electric power frequently, the cat may underperform from low operating temperature — occasional longer drives at highway speed help maintain cat efficiency. OEM
Lexus ES Catalytic Converter
- ES 250/300h uses 2AR-FE (2.5L) or A25A-FXS (hybrid) — both have close-coupled catalyst with secondary underfloor catalyst; hybrid's frequent cold starts are managed by fast-light-off catalyst coating
- ES hybrid cat advantage: Atkinson cycle engine runs very cleanly — catalytic converter rarely fails before 200,000 km if oil consumption is normal
- ES P0420 diagnosis: run Techstream to check coolant temp (cat efficiency test requires full warm-up), O2 sensor switching frequency, and fuel trims — rule out O2 sensor failure before replacing cat
- ES catalytic converter theft: ES is lower-slung sedan — catalytic converter theft is less common than on SUVs but still possible; consider anti-theft cat shield if parking in high-risk areas