Audi A3 8Y (2020 – 2025)

Reliability score : 8.2/10

The fourth-generation Audi A3 (code name 8Y) is based on the Volkswagen Group's MQB Evo platform, shared with the Golf 8. Launched in 2020, it asserts its premium positioning with a more muscular exterior design and a highly digitized interior. While its road handling, sound insulation, and engine efficiency (especially the mild-hybrid TFSI petrol engines) are praised, this generation suffered from numerous software bugs related to the MIB3 infotainment system at its launch. There is also a slight regression in the quality of the plastics in the lower part of the cabin compared to the previous generation (8V). A facelift was carried out in early 2024, correcting most of the electronic shortcomings and introducing minor aesthetic touches as well as an update to the PHEV powertrains.

✅ Strengths

Very successful and stately exterior design
Remarkable efficiency of the 1.5 TFSI 150hp engine
Superb and safe road handling
High-level sound insulation for the category
Physical ergonomics retained for air conditioning (unlike the Golf 8)

⚠️ Weaknesses

Exasperating electronic bugs on 2020-2021 models
Quality of plastics in the lower part (doors, console) unworthy of Audi
S tronic gearbox (DQ200) sometimes hesitant at low speeds on smaller engines
Purchase price and options policy always very elitist
Intrusion of driving aids (Lane Assist) sometimes abrupt

🎯 Verdict

The Audi A3 8Y is a mechanically very accomplished premium compact, particularly in its TFSI petrol versions. The 1.5 TFSI engine (35 TFSI) represents the most rational choice, offering solid reliability and controlled fuel consumption. However, the 8Y generation was marred by major software problems at its launch. It is therefore strongly advised to target a model produced from mid-2022 onwards, or to ensure that all updates have been carried out at the dealership. Avoid under-equipped entry-level models and prioritize S line or Advanced versions for better resale value.

Common issues

Problèmes logiciels et d'infodivertissement (écran figé, bugs MMI, connectivité) Low

🔧 Dès l'acquisition

💶 100 – 300 € (hors garantie, diagnostic et mise à jour)

Vérifier les mises à jour logicielles et le fonctionnement de tous les systèmes.

Dysfonctionnements du système Mild Hybrid (MHEV) sur 1.5 TFSI (alertes, batterie 12V) Medium

🔧 20 000 – 60 000 km

💶 400 – 2 000 € (selon composant défectueux: batterie, convertisseur)

Faire contrôler le système MHEV et la batterie 12V lors des entretiens.

Fuite de liquide de refroidissement (pompe à eau ou boîtier thermostat) Medium

🔧 50 000 – 100 000 km

💶 500 – 900 €

Surveiller régulièrement le niveau de liquide de refroidissement et les traces de fuite.

Usure prématurée ou irrégulière des pneus (souvent liée à la géométrie) Low

🔧 Dès 20 000 km

💶 100 – 250 € (réglage géométrie) + coût des pneus

Faire contrôler la géométrie des trains roulants, surtout après un choc ou l'achat.

Estimated maintenance costs

Oil change	£70 – 130
Clutch	£750 – 1 400 (pour boîte manuelle)
Complete brakes	£220 – 480
Estimated annual budget	£550 – 1 100

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