The 2022 S90 Recharge is a plug-in hybrid (T8 powertrain) combining a 2.0L turbo/supercharged four-cylinder with an electric rear axle. While relatively new, early adopters are seeing catastrophic engine failures tied to coolant intrusion and bearing wear—serious issues that overshadow otherwise solid hybrid drivetrain components.
Catastrophic Engine Failure (Coolant Intrusion / Bearing Damage)
Occasional · high severityTypical onset: 30,000-70,000 mi
Symptoms: white smoke from exhaust, rapid coolant loss with no external leaks, knocking or rattling from crankcase, metal particles in oil, check engine light with misfire codes
Fix: Coolant leaks into cylinders via failed head gasket or cracked block, destroying bearings and requiring full short block or engine replacement. 18-25 labor hours for short block swap, often includes heads, pistons, and all bearings.
Estimated cost: $12,000-18,000
Transmission Oil Cooler Leaks
Common · medium severityTypical onset: 40,000-80,000 mi
Symptoms: transmission fluid puddles under vehicle, transmission overheating warnings, burnt ATF smell, slipping or delayed shifts when hot
Fix: External cooler lines or internal cooler seals fail, mixing coolant and ATF or causing external leaks. Requires cooler replacement and full fluid flush. 3-5 hours labor.
Estimated cost: $800-1,400
Engine/Transmission Mount Failures
Common · low severityTypical onset: 50,000-90,000 mi
Symptoms: clunking when shifting from Park to Drive, excessive vibration at idle, visible engine movement under acceleration, thudding over bumps
Fix: Hydraulic engine and transmission mounts wear prematurely, especially on hybrid models due to engine start/stop cycles. Replace both engine and transmission mounts. 2-4 hours labor.
Estimated cost: $600-1,100
Turbocharger and Supercharger Wear (T8 Twincharging System)
Occasional · high severityTypical onset: 60,000-100,000 mi
Symptoms: loss of power under acceleration, whistling or whining noise from engine bay, blue smoke on startup, oil consumption increase, check engine light with boost pressure codes
Fix: The T8 uses both turbo and supercharger. Oil starvation or carbon buildup causes turbo bearing failure or supercharger clutch slip. Turbo replacement: 6-8 hours; supercharger: 8-10 hours.
Estimated cost: $3,500-6,000
Hybrid Battery Coolant Pump Failures
Occasional · medium severityTypical onset: 50,000-90,000 mi
Symptoms: hybrid battery overheating warnings, reduced electric-only range, battery charging errors, coolant pump noise from rear of vehicle
Fix: Dedicated coolant pump for high-voltage battery fails, causing battery thermal management issues and reduced battery lifespan. Pump replacement requires interior trim removal. 4-6 hours labor.
Estimated cost: $1,200-1,800
Fuel System Contamination / Fuel Filter Clogging
Occasional · medium severityTypical onset: 40,000-70,000 mi
Symptoms: hard starting after sitting, rough idle and hesitation, loss of power under load, fuel system pressure faults
Fix: Direct-injection system is sensitive to fuel quality; particulates clog in-tank filter and high-pressure pump inlet screen. Requires tank drop, filter and pump strainer replacement. 3-5 hours labor.
Estimated cost: $700-1,300
Skip it unless you love expensive surprises—the T8 engine has a disturbing track record of early failures, and used examples may already be ticking time bombs.
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.