Toyota Optima / Coaster

Manual transmission fluid capacity & service interval

Toyota Optima / Coaster manual transmission fluid specifications cover a capacity of 3.2 liters. The data includes 5 different configurations.

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

TypeSpecifications
Optima / Coaster (2006- )
  • Use: Normal
  • Capacity 3,2 liter
  • Code: M155 5/1
Optima / Coaster (1999-2006)
  • Use: Normal
  • Capacity 3,2 liter
  • Code: M152 5/1
Optima / Coaster (1999-2006)
  • Use: Normal
  • Capacity 3,2 liter
  • Code: M155 5/1
Optima / Coaster (1997-1999)
  • Use: Normal
  • Capacity 3,2 liter
  • Code: M152 5/1
Optima / Coaster (1997-1999)
  • Use: Normal
  • Capacity 3,2 liter
  • Code: M155 5/1

Additional Notes

  • The Toyota Optima / Coaster manual transmission fluid capacity holds at 3.2 liters across all listed model generations, from the 1997-1999 range through the 1999-2006 range and into models from 2006 onward.
  • A 3.2-liter manual transmission fill is a moderately sized service quantity, consistent with medium-duty gearboxes found in bus and coach platforms rather than light passenger vehicles.
  • All listed configurations carry a normal use condition designation, meaning the specified 3.2-liter capacity applies to standard operating environments rather than severe-duty cycles.
  • The 1997-1999 generation entries appear twice in the specifications, both recording an identical 3.2-liter capacity under normal use conditions for the manual transmission.
  • The 1999-2006 generation similarly carries duplicate entries, each confirming the same 3.2-liter manual transmission fluid capacity under normal use conditions.
  • The consistency of the 3.2-liter figure across the 1997-1999, 1999-2006, and 2006-onward generations indicates no capacity revision was introduced at any of the listed generational transitions.

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