The 2018 370Z's VQ37VHR is generally robust, but this platform suffers from specific high-mileage engine failures, chronic transmission cooler failures, and some notorious fuel system quirks that can leave you stranded.
Transmission Oil Cooler Failure (Auto Transmission)
Common · high severityTypical onset: 40,000-80,000 mi
Symptoms: Pink or milky transmission fluid indicating coolant contamination, Transmission slipping or erratic shifting, Overheating transmission temp gauge readings, Catastrophic transmission failure if contamination progresses
Fix: Replace transmission oil cooler, flush entire cooling system and transmission multiple times to remove cross-contaminated fluids. If caught late, transmission rebuild required. 4-6 hours labor for cooler only, 15-20 hours if transmission damaged.
Estimated cost: $800-1,200 (cooler only), $3,500-5,500 (with transmission rebuild)
Fuel System Starvation Under Hard Cornering
Common · medium severitySymptoms: Engine stumbles or cuts out during aggressive cornering with less than half tank, Hesitation or bogging during track use or spirited mountain driving, Check engine light with lean fuel codes (P0171/P0174)
Fix: Design flaw where fuel sloshes away from pickup on low fuel. Aftermarket fuel starvation kit installation includes secondary baffles and pickup relocation. 3-4 hours labor dropping tank and modifying internals.
Estimated cost: $600-900
Clutch Slave Cylinder Failure (Manual Transmission)
Common · high severityTypical onset: 30,000-70,000 mi
Symptoms: Clutch pedal stuck to floor or extremely soft engagement, Inability to shift gears or get into gear, Fluid leaking inside bell housing, Clutch engagement point changes dramatically
Fix: Internal slave cylinder requires transmission removal. Common practice is to replace clutch assembly simultaneously since transmission is already out. 8-10 hours labor.
Estimated cost: $1,200-1,800 (slave only), $2,200-3,200 (with clutch kit)
VQ37VHR Oil Consumption and Gallery Gasket Failure
Occasional · high severityTypical onset: 80,000-130,000 mi
Symptoms: Excessive oil consumption (quart every 1,000-2,000 miles), Valve train noise or ticking that doesn't resolve with fresh oil, Low oil pressure at idle when hot, Metallic debris in oil filter during changes
Fix: Oil gallery gaskets deteriorate causing pressure loss; piston ring wear from inadequate lubrication. Requires engine removal, teardown, gallery gasket replacement, honing cylinders, new rings minimum. Some cases need oversized pistons. 25-35 hours labor for proper rebuild.
Estimated cost: $4,500-7,500
Steering Lock Mechanism Failure
Occasional · high severityTypical onset: 50,000-90,000 mi
Symptoms: Car won't start with steering lock error on dash, Clicking noise from steering column when starting, Intermittent no-start condition that resolves after waiting, Complete inability to start requiring tow
Fix: Electronic steering lock actuator fails and prevents starting entirely. Common preventive measure is to remove fuse to disable system. Replacement requires column disassembly. 2-3 hours labor.
Estimated cost: $400-700 (many owners just pull the fuse)
Transmission Mount Failure
Common · low severityTypical onset: 60,000-100,000 mi
Symptoms: Clunking when shifting gears or engaging clutch, Excessive vibration at idle in gear, Shifter slop or difficulty finding gears, Visible cracking or separation of rubber mount
Fix: Transmission mount deteriorates from engine torque and heat. Straightforward replacement but requires supporting transmission. 1.5-2 hours labor.
Estimated cost: $250-450
Concentric Slave Cylinder (CSC) Bearing Failure
Occasional · medium severityTypical onset: 40,000-80,000 mi
Symptoms: Grinding or rattling noise when clutch pedal depressed, Clutch chatter during engagement, Difficulty shifting into first or reverse, Bearing noise that changes with clutch pedal position
Fix: The CSC bearing wears prematurely, especially with performance driving. Requires transmission removal same as slave cylinder. Smart shops do clutch, slave, and bearing together. 8-10 hours labor.
Estimated cost: $1,500-2,500 (combined with clutch job)
Buy one if you love the driving experience and accept that the 7AT cooler and manual CSC are virtually guaranteed expenses—budget $3-5k for deferred maintenance on anything over 50k miles.
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.