BMW X4 G02 (2018–2025) (2018 – 2025)

Reliability score : 8.2/10

The BMW X4 G02, launched in 2018, represents the second generation of the Bavarian brand's mid-size Sports Activity Coupé (SAC). Based on the CLAR platform, it shares its foundations with the X3 G01, offering a more dynamic and sporty silhouette at the expense of slightly reduced rear passenger space. Positioned as a more stylish and less conventional alternative to the traditional SUV, the X4 G02 stands out with its bold design and road performance. In 2021, the model received a facelift (LCI - Life Cycle Impulse) bringing subtle aesthetic modifications to the front and rear, an interior update with a larger central screen, and the integration of 48V mild-hybrid technology on most six-cylinder engines, improving efficiency and responsiveness. Overall, the X4 G02 is perceived as a well-bui

✅ Strengths

Premium build quality and interior finish
Dynamic and precise road handling
Wide choice of powerful and efficient engines
Overall comfort (seats, sound insulation)
Advanced onboard technology (iDrive, driving aids)
Excellent ZF 8HP automatic gearbox

⚠️ Weaknesses

Firm suspension on sporty versions or with large wheels
Rear passenger space and trunk volume slightly less than the X3
Limited rear visibility due to the sloping roofline
High maintenance and spare parts cost
Fuel consumption of powerful gasoline versions
Potential problems related to the AdBlue and DPF system on diesels if used improperly

🎯 Verdict

The BMW X4 G02 is an excellent choice for those looking for a premium, dynamic, and well-equipped SUV coupé. Its reliability is generally very good, especially for the six-cylinder gasoline (B58) and diesel (B57) engines, which are benchmarks in this regard. For diesel engines (B47, B57), which were your target, they offer an excellent compromise between performance and fuel consumption. The generous torque is ideal for long journeys and highway driving. However, it is crucial to ensure that recalls concerning the EGR cooler have been performed and that the vehicle has been regularly used on long journeys to preserve the DPF and AdBlue system. An impeccable service history is a guarantee of peace of mind. Gasoline versions, especially the B58 (M40i), are safe bets in terms of reliability and driving pleasure. The M versions (S58) are performance beasts but require a significant maintenance budget. Buying advice: Prioritize a model with a clear service history, ideally at BMW. Check for manufacturer recalls and perform a thorough test drive to detect any suspension noises or electronic anomalies. If usage is primarily urban, gasoline versions will be more suitable to avoid DPF/AdBlu

Common issues

Encrassement du filtre à particules (FAP/DPF) Medium

🔧 80 000 – 150 000 km

💶 200 – 3 000 € (régénération forcée à remplacement)

Privilégier les longs trajets réguliers pour favoriser la régénération du FAP.

Dysfonctionnement de la vanne EGR et/ou du refroidisseur EGR Medium

🔧 70 000 – 130 000 km

💶 300 – 1 500 € (nettoyage à remplacement)

Une conduite variée et des décrassages réguliers limitent l'encrassement.

Problèmes du système AdBlue (SCR) Medium

🔧 60 000 – 120 000 km

💶 500 – 1 800 € (capteur, pompe ou injecteur)

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

Glitches ou bugs du système d'infodivertissement (iDrive) Low

🔧 Variable, souvent dès les premières années

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

S'assurer que le logiciel est à jour lors des entretiens réguliers.

Estimated maintenance costs

Oil change	£150 – 250
Complete brakes	£550 – 1 100
Estimated annual budget	£750 – 1 500

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