The 2017 718 Cayman represents Porsche's controversial switch to turbocharged four-cylinder power (2.0L base, 2.5L S). While the chassis is bulletproof, the early 982 models suffer catastrophic engine failures due to debris ingestion and bearing starvation—problems severe enough that many techs won't touch used examples without full engine history.
Catastrophic Engine Failure (Debris Ingestion / Bearing Failure)
Occasional · high severityTypical onset: 30,000-60,000 mi
Symptoms: Sudden loss of power under load, often during spirited driving or track use, Metallic rattling or knocking from engine bay, Oil pressure warning light, followed by immediate engine seizure, Rod knock that appears seemingly overnight on low-mileage cars
Fix: Complete engine replacement or rebuild. Early 2.0L turbo motors ingested casting debris from factory, shredding bearings. Porsche extended warranty coverage for some VINs but many fall outside. Rebuild requires crankshaft replacement, all bearings, often pistons. 40-60 labor hours for short block swap, 80+ for full teardown/rebuild if block salvageable.
Estimated cost: $15,000-28,000
Transmission Oil Cooler Line Failure
Common · medium severityTypical onset: 40,000-70,000 mi
Symptoms: Transmission fluid leaking onto exhaust, causing burning smell, Puddles under car after parking, red ATF visible, Transmission temperature warning on dash during spirited driving, Visible wetness on belly pan near transmission tunnel
Fix: PDK transmission cooler lines corrode where they route near heat sources. Lines must be replaced, not repaired. Requires removing undertray and partial exhaust work for access. 3-5 hours labor depending on how many lines are compromised. Flush and refill PDK fluid afterward.
Estimated cost: $800-1,400
Fuel Filter Clogging and Fuel System Recall Complications
Occasional · medium severitySymptoms: Rough idle or hesitation during acceleration, especially after refueling, Check engine light with fuel trim or fuel pressure codes (P0087, P0171), Hard starting after sitting overnight, Limp mode activation under wide-open throttle
Fix: The 2017s had a fuel line recall (NHTSA) for improper hose fittings that can leak. Beyond that, turbocharged 718s are sensitive to contaminated fuel; clogged filters starve the high-pressure pump. Filter replacement requires dropping tank or accessing through trunk area depending on model. 2-3 hours labor. If fuel pump also damaged, add 4 hours and significant parts cost.
Estimated cost: $600-2,200
Transmission Mount Failure (PDK Models)
Common · low severityTypical onset: 50,000-80,000 mi
Symptoms: Clunking when shifting from reverse to drive or during aggressive takeoffs, Vibration at idle that worsens with A/C on, Visible sagging or cracking of rubber mount during inspection, Gear lever feels notchy or imprecise
Fix: Rear transmission mount deteriorates from heat and stress, especially on PDK cars driven hard. Mount replacement requires lifting transmission slightly. 2-3 hours labor. OEM mount preferred; aftermarket often too stiff for street use.
Estimated cost: $500-900
Passenger Airbag Inflator Recall (Takata-adjacent)
Rare · high severitySymptoms: Recall notice from Porsche for airbag inflator replacement, No symptoms until deployment, then risk of shrapnel injury
Fix: NHTSA recall for passenger airbag inflator—similar concerns to Takata but Porsche-specific supplier issue. Dealer-only repair, 2-3 hours, covered under recall. Check VIN to confirm completion; many 2017s still unrepaired due to parts backorders.
Estimated cost: $0 (recall)
Buy only if engine history is bulletproof or budget includes $20k for replacement—this is a driver's car with a time-bomb motor in 2017 form.
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.