Citroën C3 III, B618

Automatic transmission fluid capacity & service interval

Citroën C3 III, B618 automatic transmission fluid capacity ranges from 2 to 7 liters. Service intervals are not specified. The data covers 6 configurations.

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

TypeSpecifications
C3 III 1.2 PureTech 110, HNP (2020-2024)
  • Use: Normal
  • Capacity 7 liter (Dry fill)
  • Capacity 3-4 liter (Service fill)
  • Code: AT6 III 6/1
C3 III 1.2 PureTech 110, HNP (2018-2020)
  • Use: Normal
  • Capacity 7 liter (Dry fill)
  • Capacity 3-4 liter (Service fill)
  • Code: AT6 III 6/1
C3 III 1.2 PureTech 83, HMR (2018-2020)
  • Use: Normal
  • Capacity 2,1 liter (Dry fill)
  • Capacity 2 liter (Service fill)
  • Code: MAPS 5/1
C3 III 1.6 VTI 115, NFP (2017-2019)
  • Use: Normal
  • Capacity 7 liter (Dry fill)
  • Capacity 3-4 liter (Service fill)
  • Code: AT6 III 6/1
C3 III 1.2 PureTech 110, HNV, HNZ (2016-2018)
  • Use: Normal
  • Capacity 7 liter (Dry fill)
  • Capacity 3-4 liter (Service fill)
  • Code: AT6 III 6/1
C3 III 1.6 VTI 115, NFP (2016-2017)
  • Use: Normal
  • Capacity 7 liter (Dry fill)
  • Capacity 3-4 liter (Service fill)
  • Code: AT6 III 6/1

Additional Notes

  • The Citroën C3 III automatic transaxle configurations across the 1.2 PureTech 110 and 1.6 VTI 115 engines share a dry fill capacity of 7 liters. A dry fill figure represents the total fluid volume required when filling a completely drained or newly assembled transmission, including all internal passages, the torque converter, and the pan.
  • Service fill capacity for the automatic transaxle variants is listed as a range of 3 to 4 liters, which is notably lower than the 7-liter dry fill. The range reflects variation in residual fluid volume left in the unit after a standard drain, meaning the actual refill quantity depends on how thoroughly the fluid has been evacuated during the service procedure.
  • The 1.2 PureTech 83 with engine code HMR, covering 2018-2020, uses a semi-automatic transaxle rather than a fully automatic unit. Semi-automatic transmissions retain manual gear selection without a conventional clutch pedal, and the fluid system in such units is typically smaller in volume than a conventional automatic.
  • The semi-automatic transaxle on the 1.2 PureTech 83 HMR carries a dry fill capacity of 2.1 liters and a service fill of 2 liters. The minimal difference between dry and service fill values indicates very little fluid remains in the unit after draining, which is characteristic of simpler automated manual transmission designs.
  • The 1.2 PureTech 110 engine appears across three distinct configuration entries spanning 2016-2024, covering engine codes HNV and HNZ for 2016-2018, HNP for 2018-2020, and HNP again for 2020-2024. Despite the engine code and year range changes, the automatic transaxle fluid capacities remain consistent at 7 liters dry and 3 to 4 liters service fill across all three entries.
  • The 1.6 VTI 115 with engine code NFP is listed across two separate year ranges, 2016-2017 and 2017-2019, both paired with the automatic transaxle at the same 7-liter dry and 3 to 4-liter service fill capacities. The split into two entries likely reflects a mid-cycle specification or calibration revision rather than a change in fluid volume requirements.
  • All six rows carry a use condition of normal, meaning the listed capacities apply under standard operating conditions rather than severe-duty cycles such as frequent towing, extreme temperatures, or stop-and-go urban driving that would otherwise alter service recommendations.

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