Porsche 718 Cayman 982c (2016 – 2025)

Reliability score : 8.8/10

The Porsche 718 Cayman (982c generation) marks a major turning point in the model's history with the introduction of turbocharged flat-4 engines (2.0L and 2.5L) replacing the traditional naturally aspirated Flat-6s, to meet emissions standards. Although the sound of these blocks divided purists, their performance, low-end torque, and reliability have proven excellent. Faced with demand, Porsche brilliantly reintroduced the legendary naturally aspirated 4.0L Flat-6 starting in 2019 on the GT4, then on the GTS 4.0 and the extreme GT4 RS. According to the TÜV and ADAC, the 718 Cayman is among the most reliable sports cars on the market, with breakdown rates well below average.

✅ Strengths

Exceptional overall reliability (TÜV 3-year defect rate: 12%, among the best)
Benchmark dynamic handling (mid-engine layout)
Flawless finish and assembly quality
Ultra-fast 7-speed PDK gearbox, indestructible if serviced on time
Masterful return of the naturally aspirated Flat-6 on the GTS 4.0 and GT4 versions
Very low depreciation, particularly on the 6-cylinder versions

⚠️ Weaknesses

Sound of the 4-cylinder engines (especially with the post-2018 DPF/FAP) disappointing for a Porsche
High maintenance cost in the official Porsche network
Price of options when new and on the used market
Known and expensive failure of the dynamic engine mounts (PADM)
Very limited mechanical accessibility (mid-engine requiring a lift for most interventions)

🎯 Verdict

The Porsche 718 Cayman (982c) is an absolute benchmark in the sports coupe category. Data from the ADAC (2 breakdowns/1000 vehicles) and the TÜV confirm exceptional reliability, well above the industry average. While purists shunned the 4-cylinder versions (2.0 and 2.5) for their sound, these models offer formidable performance and flawless mechanical robustness (the IMS bearing problem of older generations no longer exists). The 6-cylinder versions (GTS 4.0, GT4) are future collector's items, combining the magic of the naturally aspirated Flat-6 with cutting-edge reliability, provided you verify that the connecting rods recall (2021 models) has been performed if affected. A highly recommended purchase, subject to a crystal-clear history.

Common issues

Problèmes de transmission PDK (mécatronique ou embrayages) High

🔧 50 000 – 100 000 km

💶 4 000 – 10 000 € (peut varier fortement selon la pièce et la main d'œuvre)

Vérifier l'historique d'entretien de la PDK et les passages de vitesses.

Usure prématurée des supports moteur Medium

🔧 40 000 – 80 000 km

💶 800 – 1 500 €

Écouter les vibrations ou bruits anormaux du moteur à l'accélération.

Défaillance des bobines d'allumage ou bougies (misfires) Medium

🔧 60 000 – 100 000 km

💶 300 – 800 €

Remplacer les bougies et bobines selon les préconisations du constructeur.

Dysfonctionnements du système PCM (infodivertissement) Low

🔧 Variable, souvent dès les premières années

💶 0 – 2 000 € (mise à jour logicielle ou remplacement module)

Tester toutes les fonctions du système multimédia avant l'achat.

Estimated maintenance costs

Oil change	£280 – 450
Complete brakes	£1 400 – 2 400
Estimated annual budget	£1 300 – 2 800

Indicative estimates (independent garage, UK market). Prices vary by region and year.