The 2023 Toyota 86 with the FA24 2.4L boxer engine is still too new for high-mileage pattern failures, but early adopters are seeing catastrophic engine damage from the RTV silicone issue that plagued early production — chunks break loose, starve oil pickup, and grenade motors.
RTV Silicone Contamination Leading to Engine Failure
Occasional · high severityTypical onset: 5,000-30,000 mi
Symptoms: Sudden oil pressure drop with warning light, Metallic knocking or rattling from engine bay, Complete engine seizure without warning, Oil starvation despite proper maintenance
Fix: Factory assembly used excessive RTV sealant on oil pan and timing covers — chunks break off, clog oil pickup screen, starve bearings. Requires complete short block replacement or engine rebuild. 18-25 labor hours depending on approach. Toyota has issued TSB but warranty coverage inconsistent.
Estimated cost: $8,000-15,000
Transmission Oil Cooler Line Leaks
Occasional · medium severityTypical onset: 20,000-50,000 mi
Symptoms: ATF puddles under front of vehicle (auto trans models), Burnt transmission fluid smell, Slipping or delayed shifts as fluid level drops, Low fluid warnings on dashboard
Fix: Cooler line fittings at radiator or transmission can weep or fail, especially on automatic models. Line replacement takes 2-3 hours including fluid refill and air purge. Sometimes just fittings need resealing.
Estimated cost: $400-800
Transmission Mount Failure
Common · low severityTypical onset: 30,000-60,000 mi
Symptoms: Clunking during hard acceleration or deceleration, Excessive drivetrain movement felt through shifter, Vibration at idle that wasn't there before, Visible cracks or separation in rubber mount
Fix: Rear transmission mount deteriorates prematurely, especially with spirited driving. Simple bolt-in replacement, 1.5 hours. Upgraded polyurethane mounts available but increase NVH.
Estimated cost: $250-450
Head Gasket Weeping (Early FA24 Motors)
Rare · medium severityTypical onset: 15,000-40,000 mi
Symptoms: External coolant seepage at head/block interface, Sweet smell from engine bay, Slight coolant loss over time without visible leaks elsewhere, No overheating or mixing of fluids
Fix: Some early FA24 engines show external head gasket seepage — not full failure but enough to lose coolant. Head gasket replacement is 12-16 hours on a boxer. Often covered under warranty if caught early.
Estimated cost: $2,500-4,000
Fuel System Vapor Lock / Hard Start When Hot
Occasional · low severitySymptoms: Extended cranking after car sits in hot sun, Stumbling or hesitation immediately after hot restart, Fuel smell during hot weather operation, Issue worse with ethanol-heavy fuel
Fix: Fuel system runs warm, vapor can form in lines or filter housing during heat soak. Fuel filter replacement and purge procedure takes 1 hour. Some owners install heat shielding or upgraded fuel pump. Not a safety issue, just annoying.
Estimated cost: $200-400
Buy a 2024+ model year if possible to avoid early FA24 teething issues, or budget for potential engine work on 2022-2023s — when they're good they're great, but the RTV grenade risk is real.
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.