KNOWN FAULTS · Peugeot

Known faults for the Peugeot 408.

2022–2026 · Petrol / Plug-in hybrid / Electric

Sources are not verified in real time and no entry confirms that your car is affected.

3 known faults with sources

Engines: 1.2 PureTech (Petrol)

Oil-bath timing belt degradationTiming / lubrication

Engine / equipment: 1.0 / 1.2 PureTech (EB2) in the Peugeot 208/2008/308/3008/5008, Citroën C3/C4/C5 Aircross, DS 3, Opel Corsa/Crossland/Grandland
Period mentioned: 2012 – approx. 2022
Symptoms: Oil pressure warning, hard brake pedal or reduced assistance, oil consumption, blue smoke, squeal at the front of the engine, turbo whistles or loses power.
Possible cause described: The timing belt runs in oil and degrades (especially with short trips and fuel dilution). Debris clogs the oil pump strainer, the brake vacuum pump filter, the turbo oil feed and the variable valve timing solenoids. Stellantis announced compensation for affected owners in 2025.
Check for the garage: Measure the belt through the oil filler opening with the manufacturer's tool. Confirm whether the vacuum pump campaign was done.
Cost cited in the source: Vacuum pump: €500–800; belt with oil system cleaning: considerably moreA rough figure from the original database, not an up-to-date quote.

Engines: 1.2 PureTech (Petrol) · Hybrid 180 / 225 (Plug-in hybrid)

Applies if: Only if fitted with the automatic gearbox described in the record.

EAT6/EAT8 jerking and torque converterAutomatic gearbox

Engine / equipment: Aisin EAT6 and EAT8 automatic gearboxes (308, 3008, 5008, 508, 2008, C4 Picasso, C5 Aircross, C4, DS 7, Grandland…)
Period mentioned: 2013–2026
Symptoms: Hesitation or a jolt between 1st and 2nd, torque converter shudder in traffic, harsh or delayed shifts and a gearbox fault warning, especially on 2017–2019 3008s.
Possible cause described: Torque converter wear or drift, valve deposits from degraded oil and software faults. Peugeot treats the oil as lifetime, but dirty or low oil causes harsh shifts.
Check for the garage: Check oil level and condition, update the gearbox software at the dealer and, after an oil change, record it with DiagBox and reset the adaptations.
Cost cited in the source: Oil change and update: the most common fix; torque converter or valve body: specialist garage repairA rough figure from the original database, not an up-to-date quote.

Engines: 1.2 PureTech (Petrol) · Hybrid 180 / 225 (Plug-in hybrid) · e-408 (Electric)

Applies if: Only cars built from 3/11/2023 to 9/2/2026; confirm by VIN.

Interior door handles that deactivate with the engine running (308, 408, 3008, 5008, C5 X, DS 4 and DS N°8)Bodywork

Engine / equipment: Peugeot 308, 408, 3008 and 5008, Citroën C5 X, DS 4 and DS N°8 built between late 2023 and 2026
Period mentioned: 2023–2026
Symptoms: With the car switched on, one or all four doors cannot be opened from inside.
Possible cause described: A software fault in the vehicle supervision module (VSM) can deactivate the interior handles with the engine running, so occupants could not get out, for example after a crash. Recall published in June 2026 on Rappel Conso (45,500 cars in France): 308 built from 1/11/2023 to 12/2/2026, 408 from 3/11/2023 to 9/2/2026, 3008 from 9/10/2023 to 9/7/2025 and 5008 from 5/12/2023 to 10/7/2025, plus some C5 X, DS 4 and DS N°8. The VSM software is updated in about 30 minutes.
Check for the garage: Check the campaign by VIN at the dealer; meanwhile, test the interior handles with the car switched on.
Cost cited in the source: Free under the recall.A rough figure from the original database, not an up-to-date quote.