BMW X5 G05 (2018 – 2025)

Reliability score : 8.6/10

The fourth-generation BMW X5 (code name G05) was launched in late 2018. Based on the modular CLAR platform, it marks a significant leap forward in terms of finish, onboard technology, and ride comfort, notably thanks to the adoption (optional or standard depending on the version) of air suspension on both axles. The G05 benefited from a mid-cycle refresh (LCI - Life Cycle Impulse) in spring 2023, introducing a redesigned front fascia, the integration of the iDrive 8 interface with a dual curved display, and generalized mild hybridization (48V MHEV) on thermal powertrains. In gasoline, the X5 particularly shines thanks to the legendary B58 inline 6-cylinder engine, now considered one of the most reliable engines on the global market. V8 versions offer supercar performance but require a corr

✅ Strengths

Masterful reliability of the inline 6-cylinder gasoline engine (B58)
Very high level of interior finish quality and sound insulation
Smooth and intuitive iDrive infotainment system (7 and 8)
Real-world electric range of plug-in hybrid versions (45e and 50e)
Dynamic road behavior for an SUV of this size (especially with rear-wheel steering)

⚠️ Weaknesses

Very high weight (up to 2.5 tons for PHEVs), rapidly wearing out brakes and tires
Early electronic bugs on LCI versions (iDrive 8, 50e hybrid management)
Prohibitive maintenance and insurance costs for V8 versions (M50i, M60i, X5 M)
Extreme sensitivity of the transfer case (xDrive) to tire wear differences
Complex and expensive air suspension to replace out of warranty (air springs, compressor)

🎯 Verdict

The BMW X5 G05 is undoubtedly the best premium SUV of its generation. Unlike its predecessors, which suffered from costly mechanical flaws, the G05 shines with the exceptional reliability of its 6-cylinder engines, particularly the B58 gasoline unit (xDrive40i) and its hybrid derivative (xDrive45e). It is a heavy and complex vehicle: maintenance tolerates no negligence (star-marked tires are mandatory, frequent oil changes). V8 versions are reserved for enthusiasts willing to bear a very high running budget. For a used purchase, a 2021-2022 xDrive40i or xDrive45e (before the transition to iDrive 8, with corrected early bugs) represents the safest and most balanced choice on the market.

Common issues

Problèmes électroniques et logiciels iDrive Low

🔧 Variable, souvent dès le début

💶 0 – 500 € (mise à jour logicielle, parfois remplacement module)

Vérifier l'historique des mises à jour logicielles et les rappels.

Défaillance de capteurs (ex: ABS, NOx, O2) Medium

🔧 80 000 – 150 000 km

💶 200 – 600 € par capteur

Faire un diagnostic électronique complet avant l'achat.

Usure ou défaillance des composants de suspension pneumatique (si équipé) High

🔧 100 000 – 180 000 km

💶 800 – 2 500 € par essieu ou composant

Tester la suspension sur route variée et vérifier l'assiette du véhicule.

Fuites d'huile mineures (joints de cache-culbuteurs, carter d'huile) Medium

🔧 120 000 – 200 000 km

💶 400 – 1 200 €

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

Estimated maintenance costs

Oil change	£100 – 180
Timing chain	£2,000 – 4,500 (si nécessaire, non routinier)
Complete brakes	£550 – 1,100
Estimated annual budget	£800 – 1,600

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