KGM Rexton III (Y400) (2017 – 2025)

Reliability score : 8.3/10

The 3rd generation KGM Rexton (code name Y400, also known as G4 Rexton), initially marketed under the SsangYong brand before the takeover and name change to KGM (KG Mobility) in 2022/2023, is a large 5- or 7-seater family SUV. Unlike the majority of modern SUVs that use a monocoque structure, the Rexton remains faithful to the ladder frame chassis (Quad Frame), making it a true off-roader and an excellent tow vehicle (up to 3.5 tonnes of towing capacity). It received a major facelift in late 2020 (marketed in 2021) bringing a modernized front end, a more luxurious interior, an update to its diesel engine (going from 181 to 202 hp) and a new 8-speed automatic gearbox replacing the old 7-speed Mercedes unit. It is a niche vehicle in Europe, offering an unbeatable price/performance/space rati

✅ Strengths

Exceptional towing capacity (up to 3,500 kg in automatic version)
Gigantic interior space and roominess in the rear seats (including the 3rd row)
Unbeatable price/equipment ratio on the used market
Very reassuring overall mechanical reliability (robust D22DTR engine)
True off-road capabilities (ladder frame chassis, low range, rear differential lock on certain trims)
Interior finish significantly improved, particularly after the 2021 facelift

⚠️ Weaknesses

Clumsy road handling and jittery suspension when unladen (typical of ladder frame chassis)
High fuel consumption (weight exceeding 2.1 tonnes unladen)
Sparse KGM/SsangYong dealer network in Europe
Significant depreciation and sometimes difficult resale compared to established brands
Slightly dated infotainment system on pre-2021 models
Highly geared steering lacking feedback

🎯 Verdict

The KGM (SsangYong) Rexton Y400 is an extremely rational choice for a targeted audience: those who need to tow heavy loads (horse trailers, large boats), go off the beaten track, or transport 7 people without paying the premium price of a Toyota Land Cruiser. The 2.2 e-XDi diesel engine is a success in terms of reliability, although it is penalized by the weight of the vehicle. The facelifted models (post-2021) with the 202 hp engine and the 8-speed automatic gearbox are significantly more pleasant on a daily basis. If you are looking for a dynamic SUV for city driving or winding roads, look elsewhere. If you are looking for a robust workhorse that is luxurious inside and affordable, it is an excellent used buy.

Common issues

Encrassement du FAP (Filtre à Particules Diesel) Medium

🔧 80 000 – 150 000 km

💶 300 – 600 € (nettoyage), 1 200 – 2 500 € (remplacement)

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

Dysfonctionnement de la vanne EGR (encrassement) Medium

🔧 70 000 – 130 000 km

💶 200 – 400 € (nettoyage), 400 – 800 € (remplacement)

Un nettoyage préventif peut prolonger sa durée de vie et éviter les pannes.

Problèmes du système AdBlue (pompe, capteurs, cristallisation) High

🔧 90 000 – 180 000 km

💶 600 – 1 800 €

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

Usure prématurée des silentblocs de suspension et rotules Low

🔧 80 000 – 160 000 km

💶 300 – 800 € par essieu

Vérifier régulièrement l'état des silentblocs, surtout après usage intensif ou tout-terrain.

Estimated maintenance costs

Oil change	£70 – 130
Timing chain	£900 – 2 000 (si remplacement nécessaire, non routinier)
Complete brakes	£300 – 550
Estimated annual budget	£650 – 1 200

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