2020 Peugeot 308 Problems: 5 Known Issues
2020 model year · 240+ owner reports · Updated November 2026
According to Au7o's analysis of 240+ owner reports, the 2020 Peugeot 308 has 5 documented known issues, with 3 rated critical. The most serious are DPF Regeneration Failure ($200-$2,500 repair), AdBlue System Fault ($300-$1,200 repair) and 1.2 PureTech Wet Timing Belt Degradation and Oil Starvation. Across all issues with published estimates, repair costs range from $100 to $2,500. DIY maintenance guides at au7o.io.
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All 5 Known Issues
When Issues Typically Appear
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Frequently Asked Questions
What are the most common Peugeot 308 problems?
According to Au7o's analysis of 240+ owner reports, the 2020 Peugeot 308 has 5 documented issues. The most frequently reported are: DPF Regeneration Failure, AdBlue System Fault, 1.2 PureTech Wet Timing Belt Degradation and Oil Starvation. Of these, 3 are rated critical and should be addressed promptly.
Is the Peugeot 308 reliable?
The 2020 Peugeot 308 has 5 known issues documented across 240+ owner reports. 3 issues are rated critical: DPF Regeneration Failure and AdBlue System Fault and 1.2 PureTech Wet Timing Belt Degradation and Oil Starvation. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Peugeot 308 problems?
Repair costs for known Peugeot 308 issues range from $100 to $2,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, DPF Regeneration Failure, typically costs $200-$2,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2007-2026 Peugeot 308 DPF Regeneration Failure?
The 308 diesel models experience frequent DPF regeneration failures, especially in stop-start urban driving conditions. The additive-based DPF system requires periodic Eolys fluid refills that are often overlooked during servicing. Repairs typically run $200-$2,500. Severity: high.
What is the 2014-2026 Peugeot 308 AdBlue System Fault?
The AdBlue (SCR) system on BlueHDi engines triggers fault warnings and countdown timers to engine disable. The AdBlue tank/pump module (supplied as one unit) is the most common failure point, with the NOx sensor and AdBlue injector, often clogged by crystallized fluid, also faili… Repairs typically run $300-$1,200. Severity: high.
What is the 2014-2022 Peugeot 308 1.2 PureTech Wet Timing Belt Degradation and Oil Starvation?
Peugeot confirms that previous-generation 1.0 and 1.2 PureTech engines can experience an oil-pressure issue resulting from premature timing-belt degradation. Its official terms cover affected 1.2 turbo engines produced from April 2014 through June 2022. Belt debris can also block… Severity: high.
What is the 2007-2021 Peugeot 308 Diesel EGR Valve Clogs With Carbon and Sticks?
On diesel 308s (1.6 HDi and 2.0 BlueHDi), the exhaust gas recirculation (EGR) valve sends some exhaust back into the intake. Over time, soot and carbon build up in the valve and its passages until it moves only partly or sticks. Short town trips make this worse because the engine… Repairs typically run $200-$600. Severity: medium.
What is the 2014-2021 Peugeot 308 Electric Parking Brake (EPB) Faults — Caliper Motor, Switch and Wiring?
308 II (T9) and later cars with the electric parking brake commonly throw a 'Parking brake fault' message with a flashing warning lamp, the brake refusing to release or failing to auto-apply. Documented root causes across owner forums include failure of the electric actuator moto… Repairs typically run $100-$900. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.