BMW Série 8 G14/G15 (2018 – 2025)

Reliability score : 8.2/10

The BMW 8 Series (G14 Convertible, G15 Coupe, G16 Gran Coupe) marks the return of the legendary flagship grand tourer, effectively replacing the 6 Series. Positioned at the pinnacle of BMW's non-SUV lineup, it blends high-end luxury with serious dynamic capabilities. A mid-cycle refresh (LCI) was introduced in 2022, bringing standard M Sport packages, an illuminated 'Iconic Glow' grille, and an upgraded 12.3-inch infotainment screen. While the petrol V8s grab the headlines, the 840d xDrive (Diesel) is a standout engineering marvel for the European market, offering a unique proposition: a sleek, high-performance grand tourer capable of crossing continents on a single tank with massive low-end torque. Overall, the G14/G15/G16 generation benefits from BMW's highly refined CLAR platform and re

✅ Strengths

The B57 Diesel engine (840d) offers an unmatched blend of 680 Nm of torque and 40+ MPG (UK) on the highway.
Exceptional build quality and luxurious interior materials.
iDrive 7.0 is highly intuitive, stable, and user-friendly.
xDrive system provides outstanding all-weather traction.
B58 (840i) and B57 (840d) inline-6 engines are industry benchmarks for reliability.
Superb ride comfort, especially with adaptive M suspension.

⚠️ Weaknesses

Severe depreciation, especially for V8 models (M850i).
Rear seats in the Coupe (G15) and Convertible (G14) are practically useless for adults.
Heavy curb weight (often exceeding 1.9 to 2.0 tons) accelerates tire and brake wear.
Diesel models (840d) are highly sensitive to short, urban trips (DPF/EGR issues).
High cost of replacement parts and insurance.

🎯 Verdict

The BMW 8 Series (G14/G15/G16) is a phenomenal grand tourer. If you are looking at the 840d xDrive, it is an absolute masterpiece for long-distance drivers, offering V8-like torque with 4-cylinder fuel economy. The B57 diesel engine is mechanically incredibly robust, provided the EGR cooler recall has been addressed and the car is driven on highways to keep the DPF clean. If your commute is mostly urban, AVOID the diesel and buy the 840i, which features the bulletproof B58 petrol engine and is the smartest, most reliable buy of the range. The V8 models (M850i/M8) offer supercar thrills but require a significantly higher maintenance budget and suffer from steep depreciation.