2026-09-15
Lexus RX 350/450h Engine Oil Leak Diagnosis & Repair Malaysia
Common RX 350 oil leak points at high mileage: valve cover gaskets (V6, both banks — replace simultaneously), oil filter housing O-ring, and front crankshaft oil seal at 150,000+ km. V6 valve cover leaks often drip onto hot exhaust components causing burning oil smell. RX 450h is generally very clean — leaks are rare before 150,000 km.
RX Oil Leak Sources
- 2GR-FE/2GR-FKS V6: valve cover gaskets — common seepage at 100,000 km+ — both sides of V6
- Oil cooler line fittings: inspect at 100,000 km — cooler lines can weep at the banjo bolt connections