Automatic gearbox Citroën C4 III: problems, symptoms and price

Problems with the automatic gearbox on the the EAT6/EAT8 gearbox

From most to least important. Check the affected years and versions on each page.

- High severityFrequency: OccasionalElectronicsValve body failure leading to immobilisation or gearbox replacementYes, though in a minority of cases: there are documented failures of the EAT6/EAT8 valve body with limp mode, and several owners have had to replace the whole gearbox after very few kilometres, from around 4,200 km in one case.Repair: €2,000–€9,000
- Medium severityFrequency: CommonTransmissionJerking and hesitation when changing gear, especially when coldYes: several owners of EAT6/EAT8 models describe jerking or hesitation when changing gear, more often with a cold gearbox. It is usually down to valve body pressure or calibration, and the dealer often fixes it, though not always completely, with a software update to the control unit.Repair (garage): €1,000–€2,000
- Medium severityFrequency: CommonLubricationGearbox oil advertised as "lifetime" that is best changed preventivelyThe manufacturer does not include a scheduled EAT6/EAT8 oil change in the official maintenance, but several specialists recommend renewing it every 60,000-80,000 km: it degrades with heat and mileage even if sold as everlasting, and ageing fluid contributes to the jerking of the related fault.Repair (garage): €150–€400

Symptoms these faults cause

How much the repair costs

Depending on the fault, at an independent garage it ranges from €150^[2] (gearbox oil advertised as "lifetime" that is best changed preventively) to €2,000^[1] (jerking and hesitation when changing gear, especially when cold), including VAT. If the fault is caught in time, the repair is usually much cheaper.

Frequently asked questions

What faults with the automatic gearbox does the Citroën C4 III have?

In the Citroën C4 III there are 3 documented faults with the automatic gearbox: valve body failure leading to immobilisation or gearbox replacement (EAT6/EAT8 gearbox), jerking and hesitation when changing gear, especially when cold (EAT6/EAT8 gearbox) and gearbox oil advertised as "lifetime" that is best changed preventively (EAT6/EAT8 gearbox). Each fault has its own page with the affected years and versions, the symptoms and how to check for it.

Automatic gearbox of the Citroën C4 III: how much does the repair cost?

Depending on the fault, at an independent garage it ranges from €150 (gearbox oil advertised as "lifetime" that is best changed preventively) to €2,000 (jerking and hesitation when changing gear, especially when cold), including VAT.

Which engines of the Citroën C4 III have faults with the automatic gearbox?

The documented faults affect the EAT6/EAT8. Check the years and versions on each page: they do not always affect every unit.

Sources

Every fact on this page links to its source. If you find an error, let us know.

El cambio de aceite de la caja de cambios que evita una avería de 2.000 eurosMotor16 · Motoring press · published 24 September 2026 · consulted 27 September 2026 · in Spanish
El mantenimiento de la caja de cambios que evita una avería de más de 2.000 eurosMotor16 · Motoring press · published 21 September 2026 · consulted 27 September 2026 · in Spanish
Fiabilité Peugeot 508 2 (2018), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French