Porsche 718 Cayman maintenance: the schedule, the costs, the traps
A mid-engine sports coupe with a gas powertrain. Below: the service intervals with real cost ranges, the repairs 718 Cayman owners actually report, and the mileage windows worth buying ahead of - whether you are keeping it for yourself or putting it to work.
Service schedule
What it needs, and what that runs
| Interval | Service | Cost |
|---|---|---|
| 10,000 mi / 12 mo | Synthetic engine oil & filter, inspection, tire rotation | $350-$600 |
| 20,000 mi / 24 mo | Oil service + cabin filter, engine air filter, brake fluid flush (2 yr) | $550-$1,000 |
| 40,000 mi / 48 mo | Oil service + spark plugs, all filters, belt & seal inspection | $900-$1,800 |
| 60,000 mi | PDK transmission fluid & filter, coolant condition check | $600-$1,100 |
Known repair windows
What 718 Cayman owners actually run into
Mileage ranges where these repairs typically show up. Buying above a window is not automatically a pass - it just needs to be priced in.
Turbo wastegate actuator rattle/failure (2.0L/2.5L flat-4)
medium severity30,000-90,000 mi · $1,500-$3,500
Most-reported 718 4-cyl fault; corrosion/play in low-mounted actuator
Water pump failure
medium severity60,000-100,000 mi · $900-$1,800
Treat as ~60k preventive replacement
PDK mechatronics / clutch
medium severityAny mileage · $3,000-$6,500
Valve-body/clutch; fluid neglect is the main driver
Coolant pipe/hose leaks
low severityAny mileage · $500-$1,500
Plastic coolant fittings and front radiators age/clog with debris
AOS (air-oil separator) / rear main seal seepage
low severityAny mileage · $700-$2,000
Oil-separator diaphragm and seal seepage on higher-mile cars
Cost to keep
What it costs to own, by how long you keep it
Scheduled servicing only, from a brand-new 718 Cayman at 12,000 miles a year. Insurance, fuel, tires and depreciation are yours to add - this is the part the shop charges you for.
| You keep it | Odometer | Servicing | Per month |
|---|---|---|---|
| 1 year | 12,000 mi | $475 | $40 |
| 3 years | 36,000 mi | $1,725 | $48 |
| 5 years | 60,000 mi | $4,400 | $73 |
| 7 years | 84,000 mi | $6,225 | $74 |
| 10 years | 120,000 mi | $8,800 | $73 |
| 15 years | 180,000 mi | $13,200 | $73 |
Per-month can dip as the horizon lengthens - a major service lands in one year and then averages out across all the months after it. The left column is what you actually spend.
Beyond the schedule, the first big-ticket item this 718 Cayman is known for is Turbo wastegate actuator rattle/failure (2.0L/2.5L flat-4) from about 30,000 miles ($1,500-$3,500). It is a range, not a certainty - but it is the number to have in your head at the dealership.
Operator notes
Chain-driven turbo flat-4; GT4/GTS 4.0 use NA flat-6 (shorter service, more track-focused). Gas Cayman production ended Oct 2025; 2025 final model year. 10k/1yr synthetic factory interval; shorten for turbo/track cars; brake fluid 2 yr.
When the smart money sells
Keeping it yourself, there is no cutoff - the table above runs to fifteen years. On fleet math, where a car has to keep earning, a gas 718 Cayman retires around 95,000 miles. Carlyle's garage tracks this per car, against your actual odometer.
Cost ranges are typical US independent-shop estimates and vary by region and condition. Modeling, not mechanic advice - always confirm against your car's service records.
More Porsche guides
Similar sports cars
Running a 718 Cayman for income?
Carlyle scores the exact listing on cost per remaining mile and projected Turo income, so you know what this 718 Cayman earns before you buy it.
Free to start. No card, and we never sell your details to a dealer.