Toyota Optima / Coaster

Automatic transmission fluid capacity & service interval

Toyota Optima / Coaster automatic transmission fluid capacity ranges from 6 to 13 liters. The data covers 2 configurations.

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

TypeSpecifications
Optima / Coaster (1999-2006)
  • Use: Normal
  • Capacity 13 liter (Dry fill)
  • Capacity 6 liter (Service fill)
  • Code: A441E 4/1
Optima / Coaster (1997-1999)
  • Use: Normal
  • Capacity 13 liter (Dry fill)
  • Capacity 6 liter (Service fill)
  • Code: A441E 4/1

Additional Notes

  • The Toyota Optima / Coaster carries a dry fill capacity of 13 liters for the automatic transmission across both the 1997-1999 and 1999-2006 configurations. A dry fill figure 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 at 6 liters for both the 1997-1999 and 1999-2006 configurations. A service fill reflects only the volume displaced during a routine fluid drain, which is typically a partial exchange rather than a complete system flush.
  • The gap between the 13-liter dry fill and the 6-liter service fill indicates that roughly half the total fluid volume remains in the torque converter and transmission passages during a standard drain procedure. Technicians working from a service fill figure are accounting for this retained volume.
  • Both configurations are designated under normal use conditions, meaning the listed 6-liter service fill interval applies to standard operating environments rather than elevated-stress or severe-duty cycles.

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