The 2022 RX 350 sits on the mature AL20 platform with Toyota's proven 2GR-FKS 3.5L V6 and 8-speed automatic. Being so new, catastrophic failures like engine rebuilds are outliers—likely pre-delivery defects or abuse rather than design flaws. Most real-world issues center on transmission cooler seepage and minor drivetrain mount wear.
Transmission Oil Cooler Lines Seeping
Occasional · medium severityTypical onset: 30,000-60,000 mi
Symptoms: Small ATF puddles under front of vehicle after overnight parking, Burnt transmission fluid smell on hot days, Low fluid warning if leak progresses unchecked
Fix: Replace cooler lines and reseal connections at radiator and transmission. Flush and refill ATF. 2.5-3.5 hours labor. Sometimes the external cooler itself weeps at crimped fittings—check both.
Estimated cost: $600-1,200
Transmission Mount Deterioration
Occasional · low severityTypical onset: 50,000-80,000 mi
Symptoms: Clunk on reverse-to-drive shifts, especially when cold, Vibration at idle in gear that wasn't there before, Excessive engine rock during hard acceleration
Fix: Replace rear transmission mount (fluid-filled type). Access requires partial subframe drop or creative wrenching from below. 1.5-2.5 hours depending on lift access.
Estimated cost: $350-650
Carbon Buildup on Intake Valves (D4-S Engines)
Common · low severityTypical onset: 60,000-100,000 mi
Symptoms: Rough cold-start idle that smooths out after 30 seconds, Slight hesitation or misfire codes (P030X) under light throttle, Gradual loss of low-end torque
Fix: Walnut-blast or media-blast intake valves with manifold removed. This D4-S hybrid port/direct injection design still gets buildup on the direct-injection cylinders. 4-6 hours labor for thorough cleaning.
Estimated cost: $600-1,000
Fuel Pump Module Connector Corrosion
Rare · high severitySymptoms: Intermittent crank/no-start, usually in hot weather, Engine dies at highway speed then restarts after cooling, Fuel pump prime sound cuts out mid-cycle
Fix: Inspect and clean pump module connector under rear seat access panel. If terminals corroded, replace connector pigtail and reseal module. 1-2 hours. True pump failures are extremely rare; connector issues mimic pump death.
Estimated cost: $200-500
Premature Engine Failure (Isolated Manufacturing Defect)
Rare · high severityTypical onset: 5,000-30,000 mi
Symptoms: Catastrophic knocking, oil consumption >1 qt per 1,000 mi from new, Metal shavings in oil at first change, Check engine light with low oil pressure codes
Fix: A handful of 2022-2023 2GR-FKS engines left the factory with machining debris or improperly torqued rod bolts, leading to bearing failure. Warranty-covered short block or long block replacement. 18-24 hours labor if out of warranty. Verify service history and oil analysis if buying used.
Estimated cost: $8,000-14,000
Buy with confidence if service history is clean and no early oil consumption—this is one of the most reliable luxury crossovers, and 2022 failures are statistical noise rather than pattern problems.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.