Audi A4 B8 (8K) (2007 – 2015)

Reliability score : 6.8/10

The Audi A4 B8 (internal code name 8K) marks a major turning point for the family car with the rings. Based on the new modular longitudinal platform (MLB), it moves its front axle forward to reduce the overhang, significantly improving weight distribution and dynamism compared to the B7 generation. Available as a sedan, wagon (Avant), and all-road (Allroad), it benefited from a significant restyling (facelift 'B8.5') at the end of 2011 (model year 2012), introducing electromechanical steering, an MMI system update, and, most importantly, the correction of major engine defects. While the diesel (TDI) versions are the most common and generally durable, the first phase (2007-2011) is marred by catastrophic reliability problems with the TFSI petrol engines (excessive oil consumption, timing ch

✅ Strengths

Exceptional interior finish quality, ages very well
Safe and effective road handling (especially with Quattro)
High-level sound insulation on the highway
Wide choice of very economical diesel engines (TDI)
Timeless design, particularly in Avant (wagon) and phase 2 versions

⚠️ Weaknesses

Disastrous reliability of 1.8 and 2.0 TFSI engines from 2007 to 2011
Fragile and expensive to repair Multitronic automatic gearbox (front-wheel drive)
Cost of maintenance and spare parts (Audi network very expensive)
Average rear passenger space for its size (imposing transmission tunnel)
Premature wear of front suspension arm bushings (heavy front axle)

🎯 Verdict

The Audi A4 B8 is a car with two faces. If you are looking for a petrol model from before 2012, run away unless the engine has been completely rebuilt by Audi. On the other hand, for high-mileage drivers, the diesel (TDI) versions offer an excellent compromise between performance, consumption, and longevity, provided maintenance is rigorous. The most rational and reliable choice is a 2.0 TDI (150 or 190 hp) with a manual gearbox from phase 2 (2012-2015). For pleasure, a V6 3.0 TDI Quattro or a 3.0 TFSI (S4) will satisfy you, but plan for a significant maintenance budget. Absolutely avoid the Multitronic gearbox.

Common issues

Vanne EGR et FAP (Filtre à Particules) encrassés/défectueux Medium

🔧 80 000 – 180 000 km

💶 600 – 1 500 €

Privilégier trajets longs, décrassage régulier pour prévenir l'encrassement.

Volant moteur bi-masse (DMF) usé (sur boîtes manuelles) Medium

🔧 120 000 – 200 000 km

💶 900 – 1 800 €

Tester l'embrayage, écouter bruits ou vibrations au ralenti et à l'accélération.

Usure des bras de suspension avant (silent-blocs et rotules) Medium

🔧 100 000 – 180 000 km

💶 400 – 800 €

Vérifier jeu dans la direction, bruits sur routes dégradées et usure anormale des pneus.

Défaillance du turbo (actuateur ou roulements) High

🔧 150 000 – 250 000 km

💶 1 200 – 2 500 €

Écouter sifflements anormaux, vérifier la puissance et l'historique d'entretien.

Défaillance de l'unité mécatronique de la boîte S-Tronic (DSG) High

🔧 100 000 – 200 000 km

💶 1 500 – 3 000 €

Vérifier l'historique des vidanges de boîte, tester les passages de vitesses.

Estimated maintenance costs

Oil change	£90 – 160
Timing belt	£550 – 1 100
Clutch	£800 – 1 500
Complete brakes	£280 – 550
Estimated annual budget	£650 – 1 300

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