Peugeot 508 R8

Modern PSA diesel (1.5L BlueHDi) with common-rail, SCR catalyst, and AdBlue. Fuel-efficient and torquey, but the camshaft chain (only 7 mm wide) is the biggest weak point — Stellantis extended the warranty to 10 years/240,000 km. Always check whether the 8 mm chain update has been performed. The AdBlue system and DPF are prone to issues with short-trip driving. The high-pressure fuel pump can seize from fuel contamination.

• !! Premature timing chain wear — subject to recall from 80,000 km

  The only 7 mm wide timing chain stretches prematurely and can snap. Oil dilution from short-trip use accelerates the problem. Stellantis has initiated a mega recall covering 141,700 vehicles in Germany.

  Symptoms: Rattling or clattering on cold start, engine management light, rough engine running, in the worst case sudden engine shutdown from chain snap while driving
  1,500–4,000 $
  Ad timing chain DV5RCtiming chain kit 1.5 BlueHDichain tensioner DV5
• !! High-pressure pump seizes from 40,000 km

  The Bosch high-pressure pump on the DV5 can seize, particularly on vehicles with fewer than 50,000 km. Metal swarf enters the fuel system and requires replacement of the entire injection system.

  Symptoms: Engine no longer starts or stalls while driving, engine management light, metallic noise from engine bay, power loss shortly before total failure
  2,000–5,000 $
  Ad high-pressure fuel pump DV5 Boschinjection pump 1.5 BlueHDiBosch CP4
• !! Timing chain recall — warranty extension

  Stellantis has extended the warranty to 10 years / 240,000 km (since July 2025). A software update increases oil pressure and a special oil change is performed. Chain replacement free of charge if required.

  Symptoms: Affected vehicles receive a recall notification. Workshop performs diagnosis, checks chain stretch via camshaft/crankshaft sensor comparison.
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+ 5 more engine weaknesses + vehicle weaknesses

Powerful PSA diesel (2.0L HDi, 100-133 kW) for mid-size cars and SUVs. Common-rail with turbo, later versions as BlueHDi with SCR catalyst and AdBlue. Fundamentally robust and long-lasting with high torque. Injectors and the turbocharger are the main wear items. Timing belt with water pump should be replaced at least every 160,000 km. DPF regeneration becomes problematic with short-trip driving patterns.

• !! Timing belt snap caused by defective water pump from 90,000 km

  The plastic impeller of the water pump can disintegrate from as early as 50,000 km. Fragments enter the timing belt drive and cause the belt to snap with subsequent total engine destruction.

  Symptoms: Coolant temperature rises unusually, coolant loss without visible leak, faint grinding or squealing from the timing belt drive, sudden engine shutdown when belt snaps
  600–900 $
  Ad timing belt kit DW10 water pumpSKF VKMC 03259water pump 2.0 HDi
• !! Dual-mass flywheel wear from 130,000 km

  The dual-mass flywheel wears prematurely, especially on the 107 hp variant. Oil dilution from DPF regeneration accelerates wear. The clutch should always be renewed at the same time.

  Symptoms: Squealing or clattering when starting and stopping the engine, pronounced vibrations at idle, juddering when pulling away, knocking at low revs under load
  1,000–1,800 $
  Ad dual-mass flywheel 2.0 HDiLUK ZMS DW10Sachs ZMS Peugeot 307 2.0 HDi
• !! Leaking injectors causing oil dilution from 140,000 km

  Leaking injectors allow diesel into the engine oil, drastically reducing its lubricity. The rising oil level is often overlooked. This can cause piston and bearing damage.

  Symptoms: Diesel smell at the dipstick, oil level rises above maximum, strong exhaust smell inside the car, engine judders or knocks more than usual, increased fuel consumption
  400–1,500 $
  Ad fuel injector gasket DW10fuel injector 2.0 HDi BoschKupferdichtring fuel injector DW10

+ 6 more engine weaknesses + vehicle weaknesses

PureTech 130 Turbo (96 kW) — same engine as the EB2DT with higher boost pressure. Shares the wet belt issues of early production years completely. Crankshaft end float from worn thrust washers is the second major weakness — once it exceeds 0.5 mm, the engine is no longer safely repairable. Oil consumption from piston ring coking starting around 60,000 km should be monitored. From 2022 onward, the switch to timing chain improves reliability significantly.

• !! Wet belt disintegration — notorious main problem from 60,000 km

  Identical wet belt problem as on the EB2DT. The oil-lubricated timing belt breaks down from degraded engine oil, especially during short-trip use and infrequent driving. The higher turbo output (130 hp) additionally stresses the belt. Rubber particles clog the oil pump, VVT valves and lubrication channels. Stellantis recall covered around 500,000 vehicles. Service interval was reduced from 240,000 to 70,000 km. Belt snap results in total engine failure.

  Symptoms: Engine management light, power loss, oil pressure warning, sudden engine shutdown, catastrophic engine damage
  800–8,000 $
  Ad Nassriemen EB2DTS PureTech 130timing belt Kit Oelbad EB2DTS
• !! LSPI — low-speed pre-ignition from 80,000 km

  Low Speed Pre-Ignition (LSPI) occurs at low revs under high load. Oil additive droplets in the combustion chamber ignite uncontrollably before the spark fires. This creates extremely high pressure spikes that can damage pistons and connecting rods. Using the correct engine oil (Stellantis FPW9.55535/03) significantly reduces the risk.

  Symptoms: Metallic knocking at low revs under high load, engine management light, in extreme cases piston damage
  100–4,000 $
  Ad piston EB2DTS LSPIMotoroel Stellantis FPW9
• !! High oil consumption from coked piston rings from 90,000 km

  As with the EB2DT the oil control rings tend to coke up. Oil enters the combustion chamber and is burned. The more highly loaded 130 hp engine tends to develop the problem earlier. Some owners report 1 litre per 1,500 km.

  Symptoms: Rapidly dropping oil level, blue exhaust smoke, regular topping up required
  800–2,500 $
  Ad piston rings EB2DTS 130Oelabstreifring PureTech 130

+ 3 more engine weaknesses + vehicle weaknesses

Revised THP with 165 PS (121 kW) and improved timing chain from 2014 onward. Significantly more reliable than the predecessors EP6DT/EP6CDT — the chain issues were mitigated by a stronger tensioner and wider chain. Oil consumption and valve carbon buildup persist as typical direct injection concerns. Regular oil changes with 5W-30 remain essential. Overall the best compromise within the THP engine family.

• !! Timing chain stretch (improved but not eliminated) from 100,000 km

  The EP6CDTX has a reinforced chain and revised tensioner (white guide rails instead of brown). Nevertheless, chain stretch occurs from around 100,000 km — less frequently than on EP6DT/DTS, but still relevant.

  Symptoms: Slight rattle on cold start until oil pressure builds, valve timing fault in OBD, rough idle after warm restart
  1,000–2,200 $
  Ad EP6CDTX timing chain kitTHP 165 chain tensioner revidiertPSA timing chain Kit updated
• !! Carbon build-up on intake valves from direct injection from 80,000 km

  The EP6CDTX also uses direct injection exclusively. Oil mist and EGR gases cause stubborn carbon deposits on the intake valves. Cleaning every 60,000–80,000 km is recommended.

  Symptoms: Gradual power loss, increased fuel consumption, hesitation at low revs, occasional misfires
  400–800 $
  Ad EP6CDTX Ansaugkanal cleaningTHP 165 Walnut Blasting1.6 THP intake valvee carbon buildup
• !! High-pressure pump wears prematurely from 100,000 km

  The high-pressure pump of the EP6CDTX gradually loses its internal hydraulic oil over time. It wears faster with frequent short-trip use and in hot climates. Fault code P0087 is typical.

  Symptoms: Power loss under load, engine stumbling at high revs, starting problems, MIL with fuel pressure fault
  500–1,100 $
  Ad EP6CDTX high-pressure fuel pumpTHP 165 high-pressure fuel pumpPSA high-pressure fuel pump 9819938580

+ 4 more engine weaknesses + vehicle weaknesses

Plug-in hybrid powertrain with a 1.6-liter turbo petrol engine (132 kW) and electric motor (81 kW). 12.4 kWh battery providing approximately 50-60 km of electric range. EAT8 automatic gearbox comes standard. The combustion engine is based on the EP6 family with well-known timing chain issues. The interplay between combustion engine and electric motor is complex — software updates are frequent. The high-voltage battery and power electronics add further potential failure points.

• !! On-board charger and traction battery series defect from 42,000 km

  On the 508/3008 PHEV OBC failures and traction battery faults (fault code P12F03) are documented. Affected vehicles at 40,000–44,000 km. Spare parts lead times are often several months. Costs up to 6,100 € net for a new battery.

  Symptoms: Fault message P12F03, charging not possible, car drives on combustion engine only, drivetrain warning
  2,500–8,000 $
  Ad OBC 508 PHEV Onboard ChargerAntriebsbatterie 3008 Hybrid4 1682837780high-voltage battery PHEV Peugeot
• !! Battery cell fault P1A4B25 — complete battery replacement from 45,000 km

  An internal traction battery fault causes fault code P1A4B25. The electric drive runs at severely reduced power and regeneration drops out. PSA requires a complete battery replacement (no cell-level repair possible). Cost 6,100 € net.

  Symptoms: Service light on, electric motor noticeably weaker, regeneration failed, charging the traction battery impossible
  5,000–12,000 $
  Ad Antriebsbatterie 3008 Hybrid4 P1A4B25HV battery 508 PHEV replacement
• !! Recall: battery cell overheating with fire risk

  Recall (KBA 15574R–15577R): Defective battery cells can overheat the HV battery — fire risk during charging and driving. 39,712 vehicles worldwide (6,436 in Germany), production 07/2019–10/2022. Fix: BMS software update, battery replacement if fault detected.

  Symptoms: Recall letter from manufacturer, BMS warning, in rare cases smoke during charging or driving
  0–0 $
  Ad HV battery PHEV Stellantis recall KBA 15574RBMS update Peugeot 308 508 3008 PHEV fire risk

+ 5 more engine weaknesses + vehicle weaknesses