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EAT6/EAT8 vs EDC: which gearbox is more reliable?

The EAT6/EAT8 gearbox and the EDC gearbox tie on our risk index: 38/100 (moderate risk). The EAT6/EAT8 gearbox has 1 documented serious fault, the main one being «Valve body failure leading to immobilisation or gearbox replacement»; the EDC gearbox has 3 documented serious faults, the main one being «EDC gearbox overheating and safety neutral».

Risk index

EAT6/EAT8

38

Moderate risk · 1 serious fault

Risk index

EDC

38

Moderate risk · 3 serious faults

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

15 sourcesHow we work

Is the EAT6/EAT8 gearbox reliable?

The EAT6 and EAT8 gearboxes, made by Aisin for PSA/Stellantis, are torque-converter automatics fitted to Peugeot, Citroën, DS and Opel models since 2014. Their most-cited weak point is the valve body: pressure or calibration faults cause jerking and hesitation, sometimes fixable with software, and in isolated cases failures that force a gearbox replacement. The manufacturer advertises the fluid as "lifetime", but several specialists recommend changing the oil every 60,000-80,000 km.[1][2][3][4]

See the 3 of the EAT6/EAT8 gearbox faults

Is the EDC gearbox reliable?

The EDC covers several Renault dual-clutch gearboxes: the EDC6 (Getrag DC4 dry clutch on most entry-level engines, or DW6 wet clutch on higher-torque ones) and the wet-clutch EDC7, introduced in 2016 to fix the low-speed judder of the earlier unit. Many owners document early clutch wear, overheating that forces a safety neutral, and control electronics faults, especially on the EDC6.[5][6]

See the 4 of the EDC gearbox faults

Side-by-side comparison

Comparison of EAT6/EAT8 and EDC
EAT6/EAT8EDC
Technical data
TypeGearboxGearbox
Gearbox typeTorque-converter automatic with epicyclic gear sets, 6 or 8 speeds depending on version (EAT6/EAT8)Dual-clutch: EDC6 (6-speed; DC4 dry clutch on engines under 250 Nm, or DW6 wet clutch on higher-torque engines) and EDC7 (7-speed, wet clutch, internal code DW5)
Productionsince 2014[1][7][8]since 2010[5][9][10]
Reliability
Risk index (what is it?)38Moderate risk38Moderate risk
Documented faults34
Of high or critical severity13
Worst severityHigh severityHigh severity
Main faults
  1. High severity: Valve body failure leading to immobilisation or gearbox replacement
  2. Medium severity: Jerking and hesitation when changing gear, especially when cold
  3. Medium severity: Gearbox oil advertised as "lifetime" that is best changed preventively
  1. High severity: EDC gearbox overheating and safety neutral
  2. High severity: Control electronics fault: "check gearbox" warning and loss of gears
  3. Medium severity: Premature dry clutch wear and low-speed judder (EDC6/DC4)
Most expensive documented repairup to €9,000Valve body failure leading to immobilisation or gearbox replacementPublished figure[2][11][12]up to €2,100EDC gearbox overheating and safety neutralPublished figure[5][13]
Which versions to buy
BuyRecommended versionsNoneNone
With cautionVersions to be cautious about
  • EDC6 (6-speed: DC4 dry or DW6 wet)[5][6]
  • EDC7 (7-speed, wet clutch, DW5)[6][13]
AvoidVersions to avoidNoneNone

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

EAT6/EAT8

See the 11 models with the EAT6/EAT8 gearbox

EDC

See the 11 models with the EDC gearbox

Other comparisons

With the EAT6/EAT8 gearbox

With the EDC gearbox

Compare other engines

That is the comparison you are viewing: change one of the two engines.

Sources

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

  1. Boîte auto EAT8 Peugeot / CitroënFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  2. Fiabilité Peugeot 508 2 (2018), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  3. Fiabilité Opel Grandland X (2017-2024), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  4. Fiabilité Peugeot 2008 2 (2020), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  5. Fiabilité de la boîte EDC : problèmes en série ?fiches-auto.fr · Technical documentation · published February 2020 · consulted 27 September 2026 · in French
  6. Essai Renault Scénic 4 dCi 110 EDC7 : le test du Scénic automatiqueL'Argus · Motoring press · published September 2016 · consulted 27 September 2026 · in French
  7. Peugeot 308 IIWikipédia (fr) · Other source · consulted 27 September 2026 · in French
  8. Peugeot 3008 IIWikipédia (fr) · Other source · consulted 27 September 2026 · in French
  9. Renault Scénic IIIWikipédia (fr) · Other source · consulted 27 September 2026 · in French
  10. Renault Clio IVWikipédia (fr) · Other source · consulted 27 September 2026 · in French
  11. 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
  12. 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
  13. FACUA alerta de la llamada a revisión de los Renault Megane IV GT por un problema en la caja de cambiosFACUA · Consumer association · published 26 April 2017 · consulted 27 September 2026 · in Spanish
  14. Fiabilité Peugeot 308 (2013-2021), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  15. Fiabilité Peugeot 5008 2 (2017-2024), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French