2020 LEXUS RX 350

Typical onset: 60,000-120,000 mi

Symptoms: knocking or ticking from lower engine, metal shavings in oil, sudden loss of oil pressure, check engine light with low oil pressure codes

Fix: This is the big one: spun rod bearings or main bearings from oil starvation, often tied to extended oil change intervals or low oil level operation. Requires complete engine replacement or rebuild. Short block replacement runs 18-24 labor hours; full rebuild 25-30 hours. Many owners report this happening despite following maintenance schedules, suggesting possible design sensitivity to oil quality/viscosity.

Estimated cost: $8,000-15,000

Typical onset: 80,000-120,000 mi

Symptoms: rough idle when cold, hesitation on acceleration, reduced fuel economy, misfires under load

Fix: The 2GR-FKS is direct-injection only (no port injection to clean valves), so carbon accumulates on intake valves. Requires walnut blasting media cleaning of all six cylinders. Takes 4-6 hours with intake manifold removal. More frequent on short-trip city drivers.

Estimated cost: $600-1,200

Typical onset: 70,000-110,000 mi

Symptoms: small transmission fluid spots under vehicle, slight burnt smell after highway driving, transmission fluid level slowly drops

Fix: The steel lines to the external transmission cooler can develop leaks at crimped fittings or where they pass through the frame. Not a sudden failure, but will eventually leave you low on ATF. Line replacement is 2-3 hours depending on which line.

Estimated cost: $400-800

Typical onset: 60,000-100,000 mi

Symptoms: clunk when shifting from park to drive or reverse, vibration at idle in drive, excessive engine movement visible when revving in park

Fix: The rear transmission mount (engine side) fatigues and tears. It's a fluid-filled mount that gets hammered by the V6's torque. Replacement is straightforward: 1.5-2 hours with the right support equipment.

Estimated cost: $300-550

Typical onset: 90,000-140,000 mi

Symptoms: hard starting after sitting, stumble or hesitation under heavy throttle, intermittent loss of power, fuel pump whine audible in cabin

Fix: The in-tank fuel filter/strainer can clog on vehicles that consistently ran low on fuel or got bad gas. Pump module replacement requires dropping the tank, 3-4 hours labor. More common if the vehicle sat for extended periods with old fuel.

Estimated cost: $800-1,400

Typical onset: 80,000-130,000 mi

Symptoms: burning oil, requiring top-offs between changes, blue smoke on cold start or deceleration, fouled spark plugs, carbon buildup on tailpipes

Fix: Some 2GR-FKS engines develop excessive oil consumption (1 quart per 1,000 miles or worse) due to ring wear or stuck rings from carbon. If caught early, intensive cleaning treatments sometimes help, but typically needs piston ring replacement, which means heads off and cylinders honed—20-25 hours labor. If ignored, leads to the catastrophic bearing failures mentioned above.

Estimated cost: $4,500-7,500