2026-07-21 · 4 min read
Toyota Harrier Oil Leak Malaysia
Toyota Harrier Oil Leak guide and repair information for Malaysia owners.
Oil leaks on the Harrier XU80 are uncommon before 20,000 km but become more prevalent on higher-mileage units. The M20A-FKS and A25A-FXS engines share common leak points with other TNGA-platform Toyotas. Early detection prevents minor seeps from becoming expensive repairs.
Common Oil Leak Points
- Valve cover gasket: most common — oil mist/seep at top of engine; to replace
- Oil filter housing O-ring: TNGA engines have an oil filter housing on the block — O-ring degrades at 80,000+ km
- Drain plug washer: replace every oil change — a deformed aluminium washer causes slow drip
- Hybrid (A25A-FXS): inspect around the front crank seal at 100,000+ km — rare but has occurred