Peugeot 308 III

Automatic transmission fluid capacity & service interval

Peugeot 308 III automatic transmission fluid has a capacity range of 2,5 to 6 liters. Service intervals include normal use. The data covers 5 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
308 III 1.2 PureTech 110, HNP (2021- )
  • Use: Normal
  • Capacity 6 liter (Dry fill)
  • Capacity 2,5-3,5 liter (Service fill)
  • Code: ATN8 8/1
308 III 1.2 PureTech 130, HNS (2021- )
  • Use: Normal
  • Capacity 6 liter (Dry fill)
  • Capacity 2,5-3,5 liter (Service fill)
  • Code: ATN8 8/1
308 III 1.5 BlueHDi 130, YHZ (2021- )
  • Use: Normal
  • Capacity 6 liter (Dry fill)
  • Capacity 2,5-3,5 liter (Service fill)
  • Code: ATN8 8/1
308 III HYBRID 180, DGX (2021- )
  • Use: Normal
  • Capacity 6 liter (Dry fill)
  • Capacity 2,5-3,5 liter (Service fill)
  • Code: eATN8 8/1
308 III HYBRID 225, DGY (2021- )
  • Use: Normal
  • Capacity 6 liter (Dry fill)
  • Capacity 2,5-3,5 liter (Service fill)
  • Code: eATN8 8/1

Additional Notes

  • The Peugeot 308 III automatic transmission fluid specifications cover five configurations introduced from 2021, spanning petrol, diesel, and hybrid powertrains, all sharing identical capacity figures across both fill types.
  • A dry fill capacity of 6 liters applies to all five configurations. Dry fill represents the total fluid volume required when filling a completely empty transmission, such as after a full overhaul or unit replacement.
  • The service fill capacity is listed as a range of 2.5 to 3.5 liters across all configurations. Service fill refers to the amount of fluid exchanged during a routine fluid change, which is always less than the dry fill figure because residual fluid remains in the torque converter and valve body.
  • The gap between the 6-liter dry fill and the 2.5-3.5 liter service fill range indicates that roughly half or more of the total fluid volume is retained within the transmission assembly during a standard drain-and-fill service.
  • The variable nature of the service fill range, spanning a full liter between its lower and upper bounds, reflects the practical reality that the exact amount of fluid drained during a service depends on fluid temperature, drain time, and whether the torque converter is evacuated.
  • All five configurations are classified under normal use conditions, meaning the listed service fill range applies to standard operating environments rather than severe-duty cycles such as towing or extreme temperature exposure.
  • The 1.2 PureTech 110 (HNP) and 1.2 PureTech 130 (HNS) petrol variants share not only the same capacity figures but also the same transaxle automatic designation, suggesting a common transmission unit despite differing power outputs.
  • The 1.5 BlueHDi 130 (YHZ) diesel configuration carries the same 6-liter dry fill and 2.5-3.5 liter service fill figures as the petrol variants, indicating the same transmission family is used across the combustion engine lineup.
  • Both hybrid configurations, the HYBRID 180 (DGX) and HYBRID 225 (DGY), are also specified with the transaxle automatic designation and carry identical capacity values to the non-hybrid variants, pointing to a shared transmission architecture across the entire 308 III range covered here.

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