Porsche Cayenne III (9YA) (2018 – 2025)

Reliability score : 7.8/10

The third-generation Porsche Cayenne (code name 9YA, and 9YB for the Coupé version introduced in 2019) is based on the Volkswagen Group's MLB Evo platform, shared with the Audi Q8, Bentley Bentayga, and Lamborghini Urus. Lighter, more dynamic, and technologically more advanced than its predecessor (958), it definitively abandons diesel to focus on turbocharged gasoline engines (V6 and V8) and highly popular plug-in hybrid versions (E-Hybrid). A major facelift occurred in 2023, bringing a redesigned interior (inspired by the Taycan), revised chassis settings, and the return of the V8 on the S version. In terms of reliability, this 9YA generation is considered the most accomplished of the lineage, although its electronic complexity (ADAS, infotainment) and air suspension remain points of vig

✅ Strengths

Exceptional road handling, the absolute benchmark in the luxury SUV segment
Flawless interior finish quality and assembly
Overall mechanical reliability significantly improved compared to previous generations (ADAC rate of 2.8 breakdowns/1000 veh/year for Gen III, the best in the lineup)
Highly performing and robust V8 engines (EA825)
Smooth and responsive Tiptronic S automatic gearbox (ZF 8-speed)

⚠️ Weaknesses

Recurring electronic bugs on early model years (2018-2020): PCM screens, driving aids (ADAS)
Very high weight (especially on E-Hybrid versions), leading to rapid wear of brakes and tires
Prohibitive maintenance and spare parts costs (Porsche network)
Complex air suspension: although made more reliable, it remains a potential long-term weak point (TÜV reports the suspension as a recurring defect)
What Car? breakdown rate of 27% over 12 months (score 3/5), mainly related to non-immobilizing electronic issues

🎯 Verdict

The Porsche Cayenne III (9YA) is undoubtedly the most dynamic and accomplished luxury SUV in its segment. In terms of mechanical reliability, it marks a clear improvement over the 955 and 958 generations, with robust and well-designed gasoline engines (V6 EA839 and V8 EA825). ADAC statistics confirm this, ranking it as the most reliable model in the current Porsche lineup with a very low breakdown rate (2.8). However, the record is tarnished by temperamental electronics (PCM system bugs, phantom ADAS alerts) and frequent recalls concerning suspension or assembly components. The TÜV also points out that the suspension remains a weak point to watch beyond 3 years. Buying advice: Favor a post-2020 model (where the initial teething bugs have been fixed) or ideally the 2023 facelifted version. The base 3.0 V6 is the most rational and reliable choice. The E-Hybrid versions are excellent, but their excessive weight accelerates the wear of the running gear and brakes. A purchase under an approved warranty (Porsche Approved) is highly recommended to protect against electronic or air suspension-related repair costs.

Common issues

Dysfonctionnements du système d'infodivertissement (PCM) Low

🔧 Dès 10 000 km

💶 0 € (mise à jour logicielle) – 1 500 € (remplacement module)

Vérifier le fonctionnement du PCM et l'historique des mises à jour logicielles.

Problèmes de suspension pneumatique (compresseur, capteurs, fuites) Medium

🔧 60 000 – 120 000 km

💶 800 – 2 500 €

Tester la suspension, vérifier l'absence de messages d'erreur au tableau de bord.

Fuites d'huile moteur mineures (joints de couvre-culasse, carter) Medium

🔧 80 000 – 150 000 km

💶 500 – 1 200 €

Inspecter visuellement le moteur pour toute trace d'huile, vérifier l'historique d'entretien.

Défaillance prématurée de la batterie 12V ou problèmes électriques mineurs Low

🔧 40 000 – 80 000 km

💶 300 – 700 €

S'assurer du bon fonctionnement de tous les équipements électriques et de la charge batterie.

Estimated maintenance costs

Oil change	£200 – 350
Complete brakes	£1 000 – 2 200
Estimated annual budget	£900 – 1 800

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