The 2017 S90 T8 Recharge is Volvo's plug-in hybrid flagship with a supercharged/turbocharged 2.0L four-cylinder plus rear electric motor. Early examples suffer from transmission oil cooler failures, engine mount issues, and catastrophic internal engine failures due to a known piston ring/bore wear defect that can grenade the bottom end.
Piston Ring and Cylinder Bore Wear Leading to Catastrophic Engine Failure
Occasional · high severityTypical onset: 40,000-80,000 mi
Symptoms: Excessive oil consumption (1 qt per 1,000 mi or worse), Blue smoke on startup or acceleration, Loss of power and rough idle, Metal debris in oil, complete engine seizure in worst cases
Fix: This is the infamous VEA engine weakness: piston rings microweld to bores under high heat. Fix requires full short block replacement or complete engine rebuild with updated pistons and re-honed cylinders. 18-24 hours labor plus engine assembly. Some coverage under Volvo's extended goodwill program if caught early.
Estimated cost: $8,000-15,000
Transmission Oil Cooler Failure (Aisin 8-Speed)
Common · high severityTypical onset: 50,000-90,000 mi
Symptoms: Transmission fluid mixing with coolant (strawberry milkshake in overflow tank), Harsh shifts or slipping, Overheating warnings on dash, Pink residue under radiator cap
Fix: Internal cooler in the radiator side tank cracks, cross-contaminating fluids. Requires radiator replacement, transmission fluid flush (multiple cycles), and sometimes transmission rebuild if contamination was severe. 6-10 hours labor depending on damage extent.
Estimated cost: $2,200-6,500
Transmission Mount (Rear) Collapse
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Clunking on takeoff or shift transitions, Vibration at idle in Drive, Excessive driveline movement felt through shifter, Rubbing noise from undercarriage over bumps
Fix: The rear trans mount is hydraulic-filled and fails early on T8 models due to the extra torque from electric motor. Replacement is straightforward but requires subframe support. 2.5-3.5 hours labor. OEM part only—aftermarket mounts fail faster.
Estimated cost: $600-950
High-Pressure Fuel Pump and Filter Clogging
Occasional · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Hard starting, especially when hot, Loss of boost/power under load, Limp mode with P0087 (fuel rail pressure too low), Engine stumble during acceleration
Fix: The direct-injection fuel system is intolerant of contamination. Filter is built into the high-pressure pump assembly and not separately serviceable—whole pump gets replaced. 3-4 hours labor. Use only top-tier fuel to extend life.
Estimated cost: $1,200-1,800
Hybrid Battery Coolant Pump Failure
Occasional · medium severityTypical onset: 80,000-120,000 mi
Symptoms: Hybrid system fault warning with turtle mode, Reduced electric-only range, Whining or grinding noise from under rear seat area, Battery overheat message in climate-controlled climates
Fix: The lithium-ion battery pack has a dedicated liquid cooling loop with an electric pump that fails due to bearing wear. Pump is accessible under rear seat with interior trim removal. 2-3 hours labor. Cheap part, labor-intensive access.
Estimated cost: $700-1,100
Crankshaft Position Sensor Intermittent Failure
Occasional · high severitySymptoms: Random no-start condition (cranks but won't fire), Stalling at idle or while driving, P0335 or P0339 fault codes, Issue often heat-related—fails when engine is hot
Fix: Sensor is buried at the back of the engine between block and trans bellhousing. Common to fail without warning due to heat cycling. Requires removing intake and possibly trans mount for access. 3-4 hours labor.
Estimated cost: $500-800
Avoid unless you can verify documented engine rebuild or replacement under warranty—the piston ring issue is a ticking time bomb that turns a $15k used car into a $15k repair bill.
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.