Toyota Prius IV (XW50) (2015 – 2022)

Reliability score : 9.5/10

The fourth-generation Toyota Prius (XW50) marks a major turning point for the model. Inaugurating the modular TNGA (Toyota New Global Architecture) platform, it offers transformed road handling, a lowered center of gravity, and increased rigidity compared to the XW30. Its divisive design at launch was softened during the 2019 facelift. Under the hood, the 4th generation HSD hybrid system optimizes the thermal efficiency of the 1.8L engine (up to 40%), offering impressive real-world fuel consumption (often below 4.5 L/100 km). It is an absolute benchmark in automotive reliability, highly praised by taxi drivers and high-mileage users. Expert's overall rating: A driving machine, economical and indestructible if basic maintenance is respected.

✅ Strengths

Exceptional mechanical and electronic reliability
Extremely low fuel consumption (often < 4.5L/100km)
Dynamic road handling and significantly improved comfort (TNGA chassis)
Very low maintenance cost (no clutch, no timing belt, minimal brake wear)
Hybrid system warranty extendable up to 10 years (via annual hybrid health checks)

⚠️ Weaknesses

Very divisive exterior design (especially before the 2019 facelift)
Very low ground clearance (watch out for speed bumps and curbs)
Dated, slow infotainment system with an unintuitive interface
Highway sound insulation (road and wind noise)
Reduced trunk volume on the plug-in hybrid version (PHEV)

🎯 Verdict

The Toyota Prius IV (XW50) is one of the most reliable vehicles ever produced. If you can overlook its atypical design and aging multimedia system, it is an absolutely rational purchase. Breakdowns are extremely rare, fuel consumption is negligible, and depreciation is very low. Prioritize a model with a 100% Toyota service history to ensure the high-voltage battery is guaranteed for up to 10 years. The 2019 facelift is the optimal choice for a more subdued look and the integration of Apple CarPlay / Android Auto (depending on trim levels).

Common issues

Défaillance précoce de la batterie 12V auxiliaire Low

🔧 Variable, souvent entre 3 et 5 ans d'utilisation

💶 150 – 300 €

Vérifier l'état de la batterie 12V, la remplacer préventivement si le véhicule est ancien.

Dysfonctionnement de l'actuateur de frein ABS / pompe de surpression High

🔧 150 000 – 250 000 km (rarement avant)

💶 1 500 – 3 000 €

Tester le freinage, écouter tout bruit anormal (bourdonnement) lors de l'activation des freins.

Bruit ou défaillance du moteur de soufflerie HVAC Medium

🔧 100 000 – 180 000 km

💶 200 – 400 €

Écouter attentivement les bruits anormaux (sifflements, grincements) provenant de la ventilation.

Encrassement du système EGR (Valve et Refroidisseur) Medium

🔧 180 000 – 250 000 km (surtout si trajets courts fréquents)

💶 400 – 800 €

Assurer un entretien régulier et effectuer occasionnellement de plus longs trajets pour décrasser.

Estimated maintenance costs

Oil change	£70 – 130
Complete brakes	£220 – 480
Estimated annual budget	£280 – 580

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