Peugeot 308 III (P51) (2021 – 2025)

Reliability score : 7.2/10

The third-generation Peugeot 308 (P51 for the sedan, P52 for the SW wagon) marks a major turning point for the lion brand. Based on an evolution of the EMP2 (V3) platform, it introduces the new Peugeot emblem and boasts a sharp, stately design. Positioned at the top of the C-segment (premium generalist compacts), it stands out with its modernized i-Cockpit (i-Connect Advanced) and a massive transition towards electrification. While its road qualities and sound insulation are praised, this generation initially had to contend with Stellantis' controversial mechanical legacy (belt-driven PureTech, BlueHDi) before rectifying the situation with the introduction of the new chain-driven mild-hybrid engine and a 100% electric version (e-308).

✅ Strengths

Spectacular exterior design and distinctive light signature
Excellent comfort/handling compromise
Significantly improved finish quality and interior presentation
Very successful and reliable new 136 hp MHEV engine (chain-driven)
Refined sound insulation, particularly on PHEV and BEV versions

⚠️ Weaknesses

Disappointing rear passenger space and legroom for the category
i-Cockpit ergonomics not suitable for all body types
Infotainment system prone to bugs (especially on 2021-2022 model years)
Uncertain reliability of early 1.5 BlueHDi (8mm chain) and 1.2 PureTech (belt)
High prices, particularly for PHEV and e-308 versions

🎯 Verdict

The Peugeot 308 III is a highly desirable compact car due to its style and road performance. However, its reliability record is split in two. 2021-2022 models equipped with the older combustion engines (belt-driven PureTech, 8mm chain BlueHDi) require absolute vigilance and an impeccable service history. The truly 'peace of mind' purchase lies in versions produced from late 2023, and particularly the new 1.2 Hybrid 136 hp (MHEV) engine which, thanks to its timing chain, erases past concerns. PHEV versions are relevant for fleets, provided they are recharged daily.

Common issues

Dysfonctionnements du système d'infodivertissement Low

🔧 Dès les premiers kilomètres

💶 Souvent résolu par mise à jour logicielle (sous garantie)

Vérifier les mises à jour logicielles et le bon fonctionnement de l'écran tactile.

Problèmes liés au système AdBlue (moteurs 1.5 BlueHDi) Medium

🔧 40 000 – 80 000 km

💶 500 – 1 200 € (remplacement capteur, injecteur ou réservoir)

Privilégier les longs trajets, éviter de rouler avec un niveau bas d'AdBlue.

Usure potentielle de la courroie de distribution (moteurs 1.2 PureTech) High

🔧 80 000 – 120 000 km (surveillance dès 60 000 km)

💶 800 – 1 500 € (remplacement préventif)

Suivre scrupuleusement les intervalles de révision et vérifier l'état de la courroie.

Estimated maintenance costs

Oil change	£80 – 150
Timing belt	£700 – 1 300
Clutch	£850 – 1 500
Complete brakes	£280 – 550
Estimated annual budget	£650 – 1 300

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