Ford Focus IV (DEH) (2018 – 2025)

Reliability score : 6.8/10

The fourth-generation Ford Focus (internal code name DEH) marks a technological and stylistic turning point for the blue oval compact. Based on the new C2 platform, it offers significantly increased interior space, enhanced rigidity, and retains the driving dynamics that built the model's reputation. Facelifted in late 2021 (marketed in 2022) with the integration of the SYNC 4 multimedia system and a refined design, its engine range has evolved. Focus on Diesel (EcoBlue): Designed to meet Euro 6d-Temp then Euro 6d standards, the 1.5 and 2.0 EcoBlue engines replace the old TDCi units. They excel in their fuel efficiency and generous torque, ideal for high-mileage drivers. However, their technical architecture (notably the use of lubricated or 'wet belts') demands impeccable maintenance to p

✅ Strengths

Benchmark road handling (sharp chassis, precise steering)
Very low real-world fuel consumption for EcoBlue diesel engines
Rear passenger space and boot volume (especially in SW estate)
Ergonomics and onboard technology (especially post-facelift with SYNC 4)
Significantly improved sound insulation compared to the previous generation

⚠️ Weaknesses

Very erratic reliability of wet belts on EcoBlue diesels and early 1.0 EcoBoost engines
Fragile AdBlue emission control system (pump/tank) on diesels
8-speed automatic gearbox (converter) sometimes slow and generating jerks
Quality of some plastics in the lower part of the cabin (pre-facelift)
Disappearance of physical climate controls on the facelift (all-touch)

🎯 Verdict

The Ford Focus IV is one of the most enjoyable compact cars to drive of its generation. Regarding EcoBlue diesels: they offer remarkable driving pleasure and fuel efficiency, but their mechanical design (oil-immersed belts) is a sword of Damocles. The purchase of a 1.5 or 2.0 EcoBlue version should ONLY be considered if the maintenance history is 100% clear, performed within the Ford network, with frequent oil changes (ideally every 15,000 km). If the car has been driven extensively in the city, avoid it. For greater peace of mind, the 1.0 EcoBoost mHEV petrol versions (with timing chain, post-2020) are a much safer and more recommendable choice for most buyers.