Hyundai Kona I (OS) (2017 – 2023)

Reliability score : 8.2/10

The first-generation Hyundai Kona (OS code) is an urban SUV (B-segment) with a bold design that marked a stylistic break for the Korean brand. Launched in late 2017, it received a significant facelift in late 2020 (phase 2), softening its front end and modernizing its interior. The Kona stands out with an exceptional multi-energy offering: gasoline, diesel, hybrid (HEV), and 100% electric (BEV). Diesel Focus: Although the market shunned diesel in this segment, the Kona offered the excellent 1.6 CRDi engine (U3 / Smartstream family), available in 115 hp and 136 hp, the latter often coupled with the DCT-7 dual-clutch gearbox and all-wheel drive (HTRAC), a rarity in its category. The diesel was removed from the European catalog in late 2020 during the facelift, replaced by 48V mild hybridizat

✅ Strengths

Excellent overall reliability, backed by a 5-year unlimited mileage warranty
Very fuel-efficient 1.6 CRDi engine on roads and highways (often under 5.0 L/100 km)
Physical ergonomics preserved (real buttons for climate control)
Very rich standard equipment (driving aids, infotainment)
Availability of all-wheel drive (HTRAC) on the 136 hp diesel
Plethora of engine options (from diesel to electric)

⚠️ Weaknesses

Very firm suspension, especially with 18-inch wheels
Disappointing trunk volume for the category (361 liters, 332 L in 4x4 diesel)
Quality of interior plastics (hard and prone to scratches) before the facelift
DCT-7 gearbox sometimes hesitant at low speeds and causing jerks
Fickle AdBlue system on the 1.6 CRDi (common problem with modern diesels)
Imperfect sound insulation on the highway (road noise)

🎯 Verdict

The first-generation Hyundai Kona is an excellent choice on the used car market. Regarding the 1.6 CRDi diesel specifically: it is a robust engine (chain timing) and extremely frugal, ideal for high-mileage drivers. However, like any modern diesel, it is vulnerable to clogging (DPF, EGR) and AdBlue system failures if used predominantly in the city. If your use is urban or suburban, you should definitely opt for the excellent hybrid version (1.6 GDi HEV) or the electric one (checking that the battery recall has been performed). The DCT-7 gearbox requires smooth driving in the city to preserve its clutches. Prioritize a post-2019 model to benefit from transmission software updates.

Common issues

Encrassement du FAP (Filtre à Particules Diesel) Medium

🔧 80 000 – 150 000 km

💶 200 – 500 € (nettoyage) ; 1 000 – 2 500 € (remplacement)

Privilégier les trajets longs réguliers pour une bonne régénération du filtre.

Dysfonctionnement de la vanne EGR (Recirculation des Gaz d'Échappement) Medium

🔧 70 000 – 130 000 km

💶 150 – 300 € (nettoyage) ; 400 – 800 € (remplacement)

Un nettoyage préventif lors des entretiens peut éviter des pannes coûteuses.

Problèmes avec la boîte de vitesses automatique DCT 7 rapports (si équipée) High

🔧 60 000 – 120 000 km

💶 1 000 – 2 000 € (réparation mécatronic) ; 3 000 – 5 000 € (remplacement)

Tester la fluidité des passages de rapports et vérifier l'historique d'entretien de la boîte.

Défaillance du système AdBlue / SCR (si équipé) Medium

🔧 50 000 – 100 000 km

💶 300 – 700 € (capteur) ; 800 – 1 500 € (pompe AdBlue)

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

Estimated maintenance costs

Oil change	£90 – 160
Timing chain	£400 – 850 (si remplacement nécessaire, non systématique)
Clutch	£800 – 1 450 (pour boîte manuelle)
Complete brakes	£280 – 550
Estimated annual budget	£650 – 1 300

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