Hyundai Ioniq I (AE) (2016 – 2019)

Reliability score : 8.8/10

The first-generation Hyundai Ioniq (code AE), launched in 2016, is a landmark model for the Korean manufacturer. It is the first car in the world to have been designed from the outset to offer three electrified powertrains on a single platform: hybrid (HEV), plug-in hybrid (PHEV), and 100% electric (BEV). The plug-in hybrid (PHEV) version, the focus of this sheet, combines a 4-cylinder 1.6 GDI Atkinson cycle engine (Kappa II family) with a more powerful electric motor than the standard hybrid version, powered by an 8.9 kWh lithium-ion polymer battery. It offers a real-world electric range of about 45 to 50 km. The Ioniq stands out for its highly refined aerodynamics (drag coefficient of 0.24), remarkable energy efficiency, and the use of a dual-clutch gearbox (DCT-6) that offers a more nat

✅ Strengths

Excellent overall reliability (TÜV defect rate at 3 years: 8.5%, very good for an electrified vehicle)
Class-leading energy efficiency and aerodynamics
Driving pleasure of the dual-clutch gearbox (DCT-6) superior to competing CVT gearboxes
Highly effective thermal management of the 8.9 kWh battery (PHEV), limiting degradation
Very robust McPherson strut front suspension
Very slow brake wear thanks to effective regenerative braking

⚠️ Weaknesses

Some reports of jerks from the DCT gearbox at very low speeds (non-blocking but noticeable clutch engagement)
Rear headroom limited by the sloping roofline
Hard interior plastics that scratch easily
Rear visibility hindered by the split tailgate
Fire risk on the batteries of the 100% electric (BEV) versions, which led to a major recall

🎯 Verdict

The first-generation Hyundai Ioniq (AE) is an extremely relevant and reliable used car choice, particularly in its Plug-in Hybrid (PHEV) version. Data from ADAC (1.8 breakdowns/1000 vehicles) and TÜV confirm a robust design and very healthy aging. The 1.6 GDI engine is free from the excessive oil consumption flaws known on other blocks, and the battery's thermal management guarantees good longevity. Maintenance is simplified compared to an equivalent diesel, and brake wear is minimal. If you opt for the 100% electric version, it is imperative to verify that the critical recall concerning the high-voltage battery has been carried out. For the PHEV and HEV, it is a worry-free purchase, provided you check the condition of the 12V battery and the smoothness of the DCT gearbox.

Common issues

Batterie 12V auxiliaire faible ou déchargée Low

🔧 Variable, souvent dès 30 000 km ou après 3-4 ans

💶 150 – 300 €

Vérifier la charge régulièrement, utiliser un mainteneur si stationnement prolongé.

Problèmes de recharge (port ou chargeur embarqué) Medium

🔧 Variable, peut apparaître dès 20 000 km

💶 300 – 1 500 €

Tester la recharge sur différentes bornes et avec plusieurs câbles.

Usure prématurée des pneus arrière Low

🔧 Dès 30 000 – 50 000 km

💶 200 – 400 € (par paire, hors réglage géométrie)

Vérifier l'usure des pneus arrière, faire contrôler la géométrie du train.

Bruits ou dysfonctionnements du système de climatisation Low

🔧 50 000 – 100 000 km

💶 200 – 800 €

Tester la climatisation en mode électrique et thermique avant l'achat.

Estimated maintenance costs

Oil change	£70 – 130
Timing chain	£300 – 750 (si remplacement nécessaire, non systématique)
Complete brakes	£220 – 480
Estimated annual budget	£450 – 950

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