BMW Série 5 G30/G31 (2017 – 2023)

Reliability score : 8.2/10

The seventh-generation BMW 5 Series (G30 for the sedan, G31 for the Touring wagon, G38 for the long-wheelbase version in China) marks a technological and qualitative turning point for the Bavarian brand. Based on the modular CLAR platform, it sheds up to 100 kg compared to its predecessor (F10) while integrating advanced semi-autonomous driving assistance technologies. The mid-2020 facelift (LCI - Life Cycle Impulse) modernized the front end, updated the infotainment system (iDrive 7.0), and generalized 48V mild-hybridization across almost all internal combustion engines (especially diesels). Recognized for its exceptional sound insulation, ride comfort, and preserved dynamism, the G30/G31 is one of the most accomplished road cars in its segment. In diesel, the B47 (4-cylinder) and B57 (6-

✅ Strengths

Cabin sound insulation worthy of the 7 Series
Enjoyment and fuel efficiency of 6-cylinder diesel engines (530d)
Ultra-responsive and ergonomic iDrive infotainment system (6.0 then 7.0)
Impeccable finish and assembly quality
Superb road handling (especially with 'Integral Active Steering' rear-wheel steering)
Perfectly calibrated ZF 8-speed automatic gearbox

⚠️ Weaknesses

Chronic and dangerous EGR cooler problem on diesels
Fragile rear air suspension (standard on G31 Touring wagon) (porous air springs, compressor)
Significant bulk (nearly 5 meters long) penalizing in urban areas
Reduced boot volume on plug-in hybrid (PHEV) versions
Cost of options and maintenance in the official network

🎯 Verdict

The BMW 5 Series G30/G31 is an exceptional road car that has corrected most of the flaws of the previous generation (F10). For diesels, the 530d is the absolute best buy: it offers sports car performance with city car fuel consumption, and high-level mechanical reliability. However, the purchase of a diesel model (520d or 530d) is strictly conditional on verifying the replacement of the EGR cooler through the official network. Avoid diesel models that have been used exclusively in the city. For low-mileage drivers, the 540i (B58) is a marvel of engineering, while hybrid versions (530e) are only relevant if you can recharge daily. The Touring wagon (G31) is fantastic but requires rigorous inspection of its rear air suspension.

Common issues

Dysfonctionnement du refroidisseur EGR (Exhaust Gas Recirculation) Medium

🔧 80 000 – 150 000 km

💶 800 – 1 500 €

Vérifier le niveau de liquide de refroidissement et les rappels constructeur.

Problèmes du système AdBlue/SCR (capteurs NOx, pompe, injecteur) Medium

🔧 70 000 – 130 000 km

💶 600 – 1 200 €

Utiliser un AdBlue de qualité et éviter de rouler réservoir vide.

Encrassement ou défaillance du filtre à particules (FAP/DPF) Medium

🔧 100 000 – 180 000 km

💶 1 200 – 2 500 €

Privilégier les longs trajets réguliers pour la régénération du FAP.

Défaillance des capteurs de pression différentielle du FAP ou de température des gaz d'échappement Low

🔧 90 000 – 160 000 km

💶 200 – 500 €

Faire diagnostiquer rapidement tout voyant moteur lié au FAP.

Estimated maintenance costs

Oil change	£100 – 180
Complete brakes	£500 – 850
Estimated annual budget	£750 – 1 500

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