BMW Série 7 G11/G12 (2015–2022) (2015 – 2022)

Reliability score : 7.2/10

The BMW 7 Series, G11 (standard wheelbase) and G12 (long wheelbase) generations, represents the technological flagship and the pinnacle of luxury for the Bavarian brand during this period. Launched in 2015, it introduced major innovations such as the Carbon Core structure (a blend of steel, aluminum, and carbon fiber), gesture control, the Display Key, and standard air suspension. Positioned against the Mercedes S-Class and Audi A8, it emphasizes a more assertive driving dynamic while offering exceptional comfort. A facelift (LCI) occurred in 2019, bringing aesthetic modifications (more imposing grille, refined lights) and technological updates, notably the introduction of more powerful plug-in hybrid powertrains and an evolution of the V8 gasoline engines. Overall, the G11/G12 is an impre

✅ Strengths

Exceptional ride comfort (standard air suspension)
Cutting-edge onboard technology (iDrive, gesture control, Display Key, driving aids)
High quality of finish and interior materials
Surprising driving dynamics for the category (especially with options like integral active steering)
Powerful and refined engines (particularly the B58 and B57 diesels)
Remarkable sound insulation

⚠️ Weaknesses

Technological complexity can lead to high repair costs
Significant depreciation, especially on high-end versions
High maintenance costs, especially for V8 and V12 models
High fuel consumption for V8 and V12 models
Bulkiness in the city (especially the long-wheelbase G12 version)
Reliability of the iDrive system and electronic sensors (occasional software bugs)

🎯 Verdict

The BMW 7 Series G11/G12 is an exceptional luxury limousine, offering a unique blend of comfort, technology, and dynamism. However, its acquisition as a used car requires careful consideration. The technological complexity and powerful engines imply potentially very high maintenance and repair costs. For daily use and a controlled budget, the 730i/Li (B48) or 740i/Li (B58) versions are the most recommendable. The B58 engine is particularly reliable and offers an excellent performance/consumption compromise. The B57 diesels are also very good choices for high-mileage drivers, provided the EGR system is monitored. The 750i/Li (N63) and M760Li (N74) versions offer exhilarating performance but are aimed at informed buyers willing to bear very significant maintenance and repair costs. The reliability of the N63 has improved, but it remains a demanding engine. The V12 is a magnificent piece of engineering but expensive to maintain. The plug-in hybrids (740e/745e) are interesting for tax advantages and city fuel consumption, but require a thorough check of the hybrid system and battery. Buying advice: Prioritize a model with a clear maintenance history, performed at a dealership or by a B

Common issues

Défaillance des coussins d'air de suspension ou du compresseur High

🔧 80 000 – 150 000 km

💶 800 – 2 500 € (par élément ou compresseur)

Vérifier l'assiette du véhicule à l'arrêt et l'absence de bruits anormaux du compresseur.

Fuites d'huile moteur (joints de cache-culbuteurs, carter d'huile, support de filtre) Medium

🔧 70 000 – 120 000 km

💶 600 – 1 800 € (selon moteur et localisation)

Inspecter visuellement le moteur et le dessous du véhicule pour toute trace d'huile.

Défaillance de la pompe à eau électrique High

🔧 80 000 – 140 000 km

💶 700 – 1 200 €

Surveiller la température moteur et l'efficacité du chauffage/climatisation.

Dysfonctionnements électroniques (système iDrive, capteurs, modules) Low

🔧 Variable, souvent dès 40 000 km

💶 200 – 800 € (mise à jour logicielle, remplacement capteur)

Tester toutes les fonctions électroniques et l'iDrive avant l'achat.

Estimated maintenance costs

Oil change	£100 – 170
Complete brakes	£350 – 650
Estimated annual budget	£700 – 1 400

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