2022 LEXUS ES 300H

Typical onset: 30,000-80,000 mi

Symptoms: Low oil warning light between changes, Blue exhaust smoke on cold start, Fouled spark plugs, Rough idle or misfires, Oil consumption exceeding 1 qt per 1,000 mi

Fix: Early production A25A engines had piston ring land defects causing oil burning. Toyota TSB (LSC-22L-004) covers warranty extension to 10yr/150k for affected VINs. Repair requires complete engine disassembly, new pistons and rings, cylinder honing—typically 18-24 hours shop time. If out of warranty, many shops opt for short block replacement to avoid come-backs.

Estimated cost: $6,500-9,500

Typical onset: 40,000-90,000 mi

Symptoms: Pink or red fluid puddle under engine bay, Transmission fluid level dropping, Slight metallic smell from engine compartment, Cooler lines wet near crimped fittings

Fix: Crimped aluminum cooler lines crack at stress points near radiator connections. Replace both supply and return lines as a set (they tend to fail together). Some techs also replace the quick-connect fittings if corrosion present. 2.5-3.5 hours labor including fluid refill and hybrid system precautions.

Estimated cost: $650-950

Typical onset: 50,000-100,000 mi

Symptoms: Clunking on acceleration or deceleration, Increased engine vibration at idle, Visible fluid seepage on mount body, Excessive engine movement when shifting into drive

Fix: The right-side hydraulic engine mount leaks internally, losing damping fluid. Mount replacement requires supporting powertrain, typical 2-3 hours. Not a safety issue but cabin NVH gets annoying. Often confused with transmission mount but this one is engine-side.

Estimated cost: $450-700

Typical onset: 60,000-120,000 mi

Symptoms: Rough cold start, Hesitation on light throttle, Check engine light with P0300-series misfire codes, Slightly elevated fuel consumption

Fix: Direct injection without port injection means intake valves and injector tips carbon up over time, especially with short-trip driving. Walnut blasting intake valves and injector service (ultrasonic cleaning or replacement) typically needed. 4-6 hours labor for thorough cleaning of all four cylinders.

Estimated cost: $800-1,400

Typical onset: 70,000-140,000 mi

Symptoms: High-pitched whine from under hood when hybrid system active, Inverter overheat warning on dash, Reduced hybrid assist or EV mode unavailable, Coolant level drops with no external leaks

Fix: Electric coolant pump for hybrid inverter can cavitate or seize. Diagnosis requires Tech Stream or GTS scan. Pump replacement straightforward but requires hybrid system shutdown protocol and coolant flush. 2-3 hours labor.

Estimated cost: $750-1,200