The 2016 718 Boxster S actually came with a 2.5L turbocharged flat-four (not the 3.4L H6, which was the last-gen 981 model). Early 718 turbo motors have shown concerning issues with cylinder liner wear and bearing failures, particularly in high-performance use, leading to catastrophic engine damage requiring complete rebuilds.
Cylinder Scoring and Liner Wear (MA2.0 Engine)
Occasional · high severityTypical onset: 30,000-70,000 mi
Symptoms: excessive oil consumption (1 qt per 1,000 mi or more), metallic rattling on cold starts, blue smoke from exhaust, loss of compression, metal debris in oil
Fix: Complete engine rebuild or short block replacement required. Cylinders cannot be re-sleeved successfully in most cases. 40-60 labor hours depending on transmission removal requirements and damage extent.
Estimated cost: $15,000-25,000
Rod Bearing Failure
Rare · high severityTypical onset: 40,000-80,000 mi
Symptoms: knocking sound from engine bay that worsens with RPM, metal shavings in oil filter, sudden loss of oil pressure, catastrophic engine failure if ignored
Fix: Requires engine removal and complete teardown. Often discovers additional crank damage requiring full crankshaft replacement. If caught early, rod bearings and crank polishing may suffice (25-35 hours). If spun bearing damages crank or block, full rebuild needed (50+ hours).
Estimated cost: $8,000-22,000
Transmission Oil Cooler Leaks
Common · medium severityTypical onset: 50,000-90,000 mi
Symptoms: transmission fluid spots under vehicle, low fluid level warnings, slipping or delayed shifts if fluid level drops significantly, visible seepage at cooler lines
Fix: Replace transmission oil cooler and associated seals. Requires partial drivetrain disassembly for access. 6-9 labor hours including fluid flush and refill with proper PDK fluid.
Estimated cost: $1,800-2,800
Transmission Mount Failure
Occasional · medium severityTypical onset: 60,000-100,000 mi
Symptoms: clunking when shifting gears, excessive drivetrain movement felt through chassis, vibration at idle, visible rubber deterioration or fluid leaking from hydraulic mount
Fix: Replace transmission mount assembly. Requires transmission support and lowering for access. 3-5 labor hours depending on whether engine mount replacement is done simultaneously.
Estimated cost: $800-1,400
Turbocharger Wastegate Rattle
Occasional · low severitySymptoms: rattling noise from engine bay at idle or low RPM (1,500-2,500 RPM), noise disappears under boost, no performance loss initially, turbo actuator arm has excessive play
Fix: Wastegate actuator rod develops play in bushings. Can sometimes be adjusted, but often requires turbocharger removal and rebuild or replacement. 8-12 hours per turbo if replacement needed.
Estimated cost: $2,500-4,500
Fuel Filter Clogging (Premature)
Occasional · medium severityTypical onset: 40,000-70,000 mi
Symptoms: rough idle, hesitation or stumbling under acceleration, check engine light with fuel pressure codes, hard starting when hot
Fix: Replace in-tank fuel filter assembly. Requires fuel tank removal or dropping for access. 4-6 labor hours including proper fuel system depressurization and testing.
Estimated cost: $800-1,300
The 2016 718 Boxster S offers excellent handling but carries unacceptable engine risk—only buy with comprehensive warranty or budget $20k for eventual rebuild; the 981-generation 3.4L H6 cars are far more reliable.
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.