The 2022 NX 350h is still very new, but early patterns show the A25A-FXS hybrid engine has serious oil consumption and bore scoring issues inherited from non-hybrid variants, plus some transmission cooler and mount concerns typical of the Direct Shift-CVT hybrid system.
Excessive Oil Consumption / Piston Ring Failure
Occasional · high severityTypical onset: 30,000-60,000 mi
Symptoms: burning 1+ quart per 1,000 miles, blue smoke on cold start or acceleration, low oil warning despite recent changes, rough idle as deposits build up
Fix: Toyota/Lexus TSB covers some cases under warranty extension, but out-of-warranty means complete engine rebuild with updated pistons and rings. 18-24 labor hours for proper teardown, hone, new rings, seals, and reassembly. Some shops opt for short-block replacement to save time.
Estimated cost: $6,000-9,500
Transmission Oil Cooler Line Leaks
Occasional · medium severityTypical onset: 40,000-70,000 mi
Symptoms: transmission fluid spots under vehicle, slight burnt smell, fluid level dropping on dipstick, transmission running hotter than normal
Fix: Cooler lines or cooler itself develops leaks, likely from vibration and heat cycling. Replace cooler assembly and lines, flush system. 3-4 labor hours including fluid refill and system check.
Estimated cost: $800-1,400
Transmission Mount Deterioration
Common · low severityTypical onset: 50,000-80,000 mi
Symptoms: clunk or thud when shifting into drive or reverse, vibration at idle in gear, excessive drivetrain movement visible during acceleration
Fix: Hybrid transaxle mounts wear faster due to torque characteristics and weight. Front mount is typical culprit. Replace mount, 1.5-2 labor hours including alignment check.
Estimated cost: $350-600
Fuel Filter / Low-Pressure Fuel Pump Issues
Rare · medium severityTypical onset: 60,000-90,000 mi
Symptoms: intermittent hesitation on acceleration, check engine light with fuel trim codes, rough running after refueling, hard start after sitting
Fix: In-tank fuel pump assembly or filter can clog prematurely with ethanol fuel or debris. Replace entire pump module to avoid comebacks. 2-3 labor hours including tank drop or access panel removal depending on model year nuances.
Estimated cost: $900-1,500
Hybrid Battery Cooling Fan Noise
Occasional · low severitySymptoms: loud whirring or grinding from rear cabin area during hybrid operation, fan runs continuously even in mild weather, reduced hybrid battery performance in extreme heat
Fix: Cooling fan for hybrid battery can accumulate debris or bearings fail. Access through rear cargo trim, replace fan assembly. 1.5-2 labor hours.
Estimated cost: $400-700
Too new to recommend used unless you can verify oil consumption test results and get remaining powertrain warranty — the engine issues are deal-breakers without coverage.
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.