The 2008 S80 is a solid luxury sedan undermined by catastrophic engine failures on certain variants and aging electrical gremlins. The 3.2L I6 is the safe choice; avoid the 4.4L V8 and turbocharged models unless you have documentation of preventive work.
Yamaha 4.4L V8 Catastrophic Engine Failure
Common · high severityTypical onset: 60,000-100,000 mi
Symptoms: metal shavings in oil, sudden loss of oil pressure, knocking or ticking from lower end, check engine light with low oil pressure codes, complete engine seizure
Fix: The V8 suffers from oil starvation to main and rod bearings due to inadequate oiling system design under certain driving conditions. Repair requires complete engine rebuild or replacement—shortblock minimum, often full longblock. 25-35 hours labor for R&R plus rebuild time. Many shops won't touch rebuilds; reman or used engine more common. This is a known pattern failure that has destroyed countless engines.
Estimated cost: $8,000-15,000
Turbo 3.0L T6 PCV System and Oil Consumption
Common · high severityTypical onset: 80,000-120,000 mi
Symptoms: blue smoke on startup, oil consumption over 1qt per 1000mi, rough idle, carbon buildup on intake valves, turbo failure from oil coking
Fix: The PCV breather system clogs and creates crankcase pressure, forcing oil past rings and valve seals. Eventually leads to turbo failure and piston ring issues. Proper fix requires PCV system overhaul, intake manifold cleaning, and often turbo replacement. If caught late, may need piston rings or worse. 12-20 hours depending on extent of damage.
Estimated cost: $3,000-7,000
Transmission Oil Cooler Internal Failure
Common · high severityTypical onset: 70,000-110,000 mi
Symptoms: milky pink transmission fluid, transmission slipping or erratic shifts, coolant contamination in trans, engine overheating, catastrophic transmission failure
Fix: The factory transmission oil cooler inside the radiator develops internal leaks, allowing coolant and ATF to mix. This destroys the transmission within days if not caught immediately. Requires radiator replacement, complete transmission flush and filter, often new transmission if contamination went unnoticed. Some techs replace cooler proactively. 8-15 hours for full repair if trans survives; 18-25 if trans replacement needed.
Estimated cost: $1,500-2,500 (preventive) or $4,500-7,000 (with trans damage)
Electronic Throttle Module (ETM) Failure
Occasional · high severitySymptoms: sudden limp mode with reduced power message, idle surging or stalling, complete throttle unresponsiveness, check engine light with throttle position codes, car won't accelerate above 20mph
Fix: The electronic throttle body assembly fails internally—either motor or sensors. Car enters limp mode and becomes undriveable. Volvo part only, no reliable aftermarket. Must be programmed with VIDA software. 2-3 hours labor but part availability can strand you for days.
Estimated cost: $800-1,400
Transmission Mounts Collapsing
Common · medium severityTypical onset: 60,000-90,000 mi
Symptoms: heavy clunk when shifting into drive or reverse, vibration at idle, visible engine/trans movement when accelerating, rattling from underneath on acceleration
Fix: The hydraulic transmission mount fails and allows excessive drivetrain movement. Creates harsh shift feel and can stress halfshafts. Both upper and lower mounts typically need replacement together. 3-4 hours labor. OEM mounts recommended—aftermarket don't last.
Estimated cost: $600-1,000
Front Lower Control Arm Bushings
Common · medium severityTypical onset: 70,000-100,000 mi
Symptoms: clunking over bumps, wandering steering, inner tire wear, vibration during braking, car pulls to one side
Fix: The front lower control arms use pressed-in bushings that deteriorate, causing alignment issues and noise. Many techs replace entire control arms rather than pressing bushings due to labor time. Both sides typically done together. Alignment required after. 4-5 hours labor for both sides with arms.
Estimated cost: $800-1,400
Cooling Fan Module Failure
Occasional · high severityTypical onset: 80,000-120,000 mi
Symptoms: engine overheating at idle or low speed, fan runs constantly on max, fan doesn't run at all, AC doesn't work properly, check engine light with fan control codes
Fix: The electric cooling fan control module fails and either locks fan on high or prevents it from running. Can cause overheating in traffic. Module is integrated with fan assembly on some variants. 2-3 hours labor. Subject to recall on some VINs—check NHTSA database before buying parts.
Estimated cost: $600-1,200
Buy the naturally-aspirated 3.2L I6 only, under 80k miles, with service records—avoid the V8 and turbo variants unless you enjoy expensive surprises.
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.