2026-09-15
Lexus RX 350/450h Catalytic Converter Replacement Malaysia
The RX V6 has 2 catalytic converters (one per bank of the 2GR engine). Clogging is rare before 150,000 km with proper maintenance. Symptoms: power loss, rotten egg smell, emissions check failure. OEM replacement pair. RX 450h cats run cooler due to hybrid operation, extending their lifespan further.
Lexus RX Catalytic Converter
- RX 350 uses 2GR-FE/2GR-FKS V6 — two cylinder banks means two catalytic converters (one per bank); P0420 refers to bank 1, P0430 to bank 2
- RX 450h hybrid: V6 hybrid runs Atkinson cycle — both catalytic converters typically long-lived; any P0420/P0430 on high-mileage RX 450h warrants O2 sensor check first
- RX cat replacement: V6 needs both cats replaced simultaneously if one fails — mismatched cats cause false P0430 codes; use OEM-spec converters
- RX high ground clearance: SUV height makes cat more accessible for thieves; consider cat shield — especially for older RX 450h as the platinum-group metal content is higher in hybrid cats