Citroën C6

Automatic transmission fluid capacity & service interval

Citroën C6 automatic transmission fluid capacity ranges from 3 to 7 liters. Service intervals are not specified. The data covers 5 configurations.

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

TypeSpecifications
C6 2.2 HDi DPF (2009-2011)
  • Use: Normal
  • Capacity 7 liter (Dry fill)
  • Capacity 3-4 liter (Service fill)
  • Code: AM6 6/1
C6 3.0 V6 HDi DPF (2009-2013)
  • Use: Normal
  • Capacity 7 liter (Dry fill)
  • Capacity 3 liter (Service fill)
  • Code: AM6 6/1
C6 2.2 HDi DPF (2006-2009)
  • Use: Normal
  • Capacity 7 liter (Dry fill)
  • Capacity 3-4 liter (Service fill)
  • Code: AM6 6/1
C6 2.7 V6 HDi DPF (2005-2009)
  • Use: Normal
  • Capacity 7 liter (Dry fill)
  • Capacity 3-4 liter (Service fill)
  • Code: AM6 6/1
C6 3.0i V6 24V (2005-2009)
  • Use: Normal
  • Capacity 7 liter (Dry fill)
  • Capacity 3-4 liter (Service fill)
  • Code: AM6 6/1

Additional Notes

  • Across all five configurations of the Citroën C6, the automatic transaxle carries a dry fill capacity of 7 liters, a figure that reflects the total fluid volume required when the unit is completely drained and disassembled, such as during a full overhaul or replacement.
  • The service fill capacity, which represents the amount of fluid needed during a routine drain-and-refill without full disassembly, is notably lower than the dry fill across all configurations, ranging from 3 to 4 liters depending on the engine variant.
  • The 3.0 V6 HDi DPF (2009-2013) carries a service fill capacity listed as a fixed 3 liters, whereas the 2.2 HDi DPF, 2.7 V6 HDi DPF, and 3.0i V6 24V configurations all share a service fill range of 3-4 liters under normal use conditions.
  • The gap between the 7-liter dry fill and the 3-4 liter service fill across most configurations indicates that a significant portion of fluid remains in the torque converter and hydraulic circuits even after a standard drain, which is a common characteristic of automatic transaxle designs.
  • The 2.2 HDi DPF engine appears across two separate model year bands, 2006-2009 and 2009-2011, both sharing identical capacity figures of 7 liters dry and 3-4 liters service fill under normal use conditions.
  • All five configurations are classified under normal use conditions, and the capacity values listed apply specifically within that service context rather than a severe or first-change scenario.
  • The 2.7 V6 HDi DPF, covering 2005-2009, and the 3.0i V6 24V, also covering 2005-2009, both share the same 7-liter dry and 3-4 liter service fill figures despite differing in engine displacement and fuel type.

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