Audi A5 B9 (F5) (2016–2025) (2016 – 2025)

Reliability score : 7.2/10

The second-generation Audi A5, known by the internal code B9 (or F5 for the platform), was launched in 2016, succeeding the first-generation B8. It shares its MLB Evo platform with the A4 B9, offering a lighter and more rigid architecture. Available as a coupe, Sportback (5-door), and convertible, the A5 B9 positions itself as a more stylish and sporty alternative to the A4, targeting customers seeking elegance and performance. A major facelift was introduced in late 2019 (2020 models), bringing aesthetic updates (headlights, grille, bumpers), a more modern MMI Touch infotainment system, and the integration of mild-hybrid (MHEV) technology on most powertrains to improve efficiency. Overall, the A5 B9 is perceived as a well-built, comfortable, and technologically advanced car, with a high l

✅ Strengths

Very high level of interior finish and material quality.
Excellent ride comfort, even with large wheels.
Elegant and timeless design (coupe, Sportback, convertible).
Advanced onboard technology (Virtual Cockpit, MMI Touch post-facelift).
Wide choice of powerful and efficient powertrains.
Balanced and safe road handling (efficient Quattro).

⚠️ Weaknesses

High maintenance and parts cost, especially for S/RS versions.
Long-term reliability of MHEV (mild-hybrid) systems still uncertain.
Valve carbon buildup on direct-injection TFSI engines (especially pre-facelift).
Fragile water pump on 2.0 TFSI.
Limited rear space in the coupe and convertible.
AdBlue system sometimes temperamental on diesels.

🎯 Verdict

The Audi A5 B9 is an excellent choice for anyone looking for a premium, elegant, and comfortable car, with impeccable build quality. For a worry-free purchase, prioritize: * The 2.0 TDI and 3.0 TDI diesel engines (pre-facelift) for high-mileage drivers; their reliability is proven, provided the AdBlue system and DPF are monitored. * The 3.0 TFSI (S5) and 2.9 TFSI (RS5) petrol engines for performance enthusiasts, provided you accept high maintenance costs and corresponding fuel consumption. Be more vigilant with: * The 2.0 TFSI pre-facelift (Gen3): Valve carbon buildup and the water pump are known weak points. A history of decarbonization and water pump replacement is a plus. * The MHEV (mild-hybrid) post-facelift versions: Although more efficient, 48V technology is still young and can lead to costly failures. Ensure all recalls have been performed and the system operates without fault. Tips: * A complete and clear service history is non-negotiable. Prefer a vehicle serviced at an Audi dealership or by a VAG specialist. * A pre-purchase inspection by a professional is highly recommended, especially for TFSI and MHEV versions. * Remember that the cost of parts and labor is that of a

Common issues

Fuite de la pompe à eau / boîtier de thermostat Medium

🔧 80 000 – 150 000 km

💶 600 – 1 200 €

Vérifier régulièrement le niveau de liquide de refroidissement et les signes de fuite.

Encrassement des soupapes d'admission (calamine) Medium

🔧 100 000 – 180 000 km

💶 400 – 800 €

Privilégier les trajets autoroutiers et un carburant de qualité pour limiter l'encrassement.

Défaillance de la soupape PCV (reniflard) Low

🔧 90 000 – 160 000 km

💶 250 – 500 €

Surveiller la consommation d'huile et les voyants moteur, remplacer si nécessaire.

Problèmes électroniques / logiciels MMI (infodivertissement) Low

🔧 Variable, souvent dès 50 000 km

💶 0 – 800 € (mise à jour logicielle à remplacement de module)

S'assurer des mises à jour logicielles régulières pour corriger les bugs.

Estimated maintenance costs

Oil change	£90 – 160
Complete brakes	£400 – 800
Estimated annual budget	£750 – 1 500

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