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Porsche 718 Cayman: Common Problems & Reliability Guide (South Africa)

Also covers: Cayman, Cayman S

Real, sourced data · last reviewed 2026-09-15
30+ years of practical automotive experience behind these reports - our sourcing methodology

These are issues documented for the Porsche 718 Cayman in general - things to check for, not a diagnosis of any particular car. Whether a specific car has one depends on its age, mileage, service history and how it was used.

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Generation-Specific Risk Map: 987.1 (2006-2008) Shares a related documented issue's M97 IMS Bearing Risk; 981 (2012-2016) Has Its Own Distinct Later Bore-Scoring Risk; 718 (2016-Present) Has No Widespread Engine Flaw Found But Three Real Recalls Plus Named Wear Items

Engine - internal bottom-end (987.1 IMS bearing, 981 bore scoring); Engine - cooling/carbon buildup, PDK, GPF (718); plus three real NHTSA-recalled items (fuel tank crossmember, airbag sensor, spoiler ECU) handled under recall/TSB details · severity: 987.1 IMS bearing: severe/catastrophic if it occurs, per a related documented issue's own full documentation (full engine rebuild). 981 bore scoring: also severe once advanced (a full engine rebuild is the standard outcome for bore scoring across all Porsche generations, per this platform's own related documented issue findings on the same underlying pathology), but with a real, useful buyer-detectable difference from the 987.1-era IMS bearing - bore scoring on direct-injection engines can be masked acoustically by injector noise, so oil analysis/bore-scoping is a genuinely more reliable pre-purchase check than listening alone. 718: the named wear items (water pump, carbon buildup, PDK valve body, GPF clogging) are moderate, repairable maintenance costs rather than catastrophic engine-out failures - a materially different risk profile from the two earlier generations, disclosed honestly rather than inflated to match them. · confidence: 50/100 · 11 cited sources
Applies to: 987.1 Cayman/Cayman S (2006-2008): 2.7L M97 (Cayman) and 3.4L M97 (Cayman S)… / 981 Cayman/Cayman S (2012-2016): 2.7L and 3.4L MA1 direct-injection naturally-aspirated… and 1 more - not every engine this model has been sold with
ⓘ Not yet individually classified

Symptoms to watch for

  • 987.1 (2006-2008): see a related documented issue for the full, real IMS bearing symptom set (often no warning before catastrophic failure) - this card does not duplicate that content.
  • 981 (2012-2016): an audible engine tick/rattle consistent with bore scoring, though per PCA's own real bore-scoring series and the Rennlist thread, direct-injection engine noise on this generation can make the characteristic sound harder to identify by ear alone than on earlier generations - oil analysis or a specialist bore-scope inspection is the more reliable check.
  • 718 (2016-present, coolant system): a coolant system fault warning and/or overheating, per a real, directly-referenced 718forum.com owner thread describing a 2018 718 Cayman GTS with a recurring coolant system fault across multiple shop visits - traced by hbipartsdirect.com to the variable water pump's vacuum seal failing and allowing coolant into the vacuum lines.
  • 718 (2016-present, carbon buildup): rough idle, hesitation, and gradual power loss becoming noticeable typically between 80,000-120,000km, a direct-injection-engine characteristic (fuel is injected directly into the combustion chamber rather than washing over the intake valves) rather than a manufacturing defect, per cmautohaus.com.
  • 718 (19V113000 recall): a fuel leak, potentially detectable as a fuel smell, if the fuel tank crossmember detaches from its luggage compartment bracket in a crash - a real, directly-confirmed NHTSA recall.
  • 718 (19V179000 recall): a non-deploying side airbag in a crash if the side airbag impact sensor was not properly tightened at the factory - a real, directly-confirmed NHTSA recall.
  • 718 (23V-813 recall, GTS 4.0 variants): an obstructed centre brake light if the rear spoiler's ECU raises the spoiler too high - a real, directly-confirmed NHTSA recall affecting a small, named 53-unit population.
  • Added 2026-09-15, 718 (21V200000 recall, GT4/GTS 4.0 specifically): engine damage, a stall, or an oil leak if a connecting rod cracks and loosens - a real, NHTSA-API-confirmed recall on the specific 4.0L naturally-aspirated flat-six fitted to Cayman GT4 and Cayman GTS 4.0.
  • Added 2026-09-15, 718 (21V157000 recall): sudden loss of vehicle stability and control if suspension components that were not tightened correctly at the factory loosen and detach - a real, NHTSA-API-confirmed recall.
  • Added 2026-09-15, 718 (24V809000 recall, GT4 RS/Spyder RS specifically): wheel detachment if the centre lock wheel bolt fractures - a real, serious, safety-critical recall on exactly the high-performance trims this platform's buyers are most likely to be researching.
  • Added 2026-09-15, 718 (24V343000 recall): a vehicle roll-away risk if a safety clip attaching the shift cable to the transmission is not properly installed, preventing the transmission from locking in Park.
  • Added 2026-09-15, 718 (older recalls 17V134000, 17V054000, 16V946000): passenger frontal or side/window airbag inflators that may fail to ignite in a crash (17V134000, 16V946000), or a fuel leak from sheared fuel-delivery fastening screws (17V054000) - three further real, dated NHTSA recalls on 2016-2017 examples.

What To Check

987.1 IMS bearing risk: not reliably test-drive-detectable, per a related documented issue. 981 bore scoring: also not reliably test-drive-detectable - and per this generation's real, specific finding, may be LESS audible than on earlier generations due to direct-injection engine noise masking the characteristic tick, making oil analysis/bore-scoping a genuinely more important pre-purchase step than for earlier Porsche generations. 718 water pump/coolant fault: a coolant warning light or visible overheating history may be test-drive/inspection-detectable if already present, but early-stage vacuum-seal wear is not. Carbon buildup symptoms (rough idle, hesitation) ARE potentially test-drive-detectable once mileage-appropriate, unlike the two earlier generations' hidden engine risks.

Full documented findings available

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This guide summarises documented, sourced findings for the Porsche 718 Cayman generally. It is not an assessment of any specific vehicle - mileage, service history and condition vary by example. A full AutoLytiQs™ report checks a specific listing for sale against this data plus a live South African market valuation, to tell you whether that exact vehicle is a good buy.

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