Mazda BT-50, J97M (EU)

Manual transmission fluid capacity & service interval

Mazda BT-50, J97M (EU) manual transmission fluid capacity ranges from 2,8 to 3,55 liters. Service intervals include checks every 40000 km or 24 months and changes every 80000 km or 48 months. The data covers 2 configurations.

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

TypeSpecifications
BT-50 2.5 CDVi (2006-2011)
  • Use: Normal
  • Capacity 3,55 liter
  • Check 40000 km/ 24 months
  • Change 80000 km/ 48 months
  • Code: S15M-D, S15MX-D 5/1
BT-50 3.0 CDVi (2006-2011)
  • Use: Normal
  • Capacity 2,8 liter
  • Check 40000 km/ 24 months
  • Change 80000 km/ 48 months
  • Code: S15M-D, S15MX-D 5/1

Additional Notes

  • The Mazda BT-50 J97M (EU) 2.5 CDVi carries a manual transmission fluid capacity of 3.55 liters, while the 3.0 CDVi holds 2.8 liters, meaning the smaller-displacement engine actually pairs with the higher-capacity gearbox of the two.
  • Both the 2.5 CDVi and 3.0 CDVi share identical service interval structures under normal use conditions, with a fluid check scheduled at 40,000 km or 24 months and a full fluid change at 80,000 km or 48 months.
  • The 80,000 km or 48-month change interval on both variants reflects a relatively extended drain period for a manual transmission, consistent with the sealed or semi-sealed gearbox designs common in light commercial trucks of the 2006-2011 era.
  • The 40,000 km or 24-month check interval serves as a midpoint inspection between full changes, allowing for fluid level verification and early detection of contamination or leakage without a complete drain and refill.
  • The 0.75-liter difference in fluid capacity between the 2.5 CDVi and 3.0 CDVi transmissions indicates the two engine variants are mated to physically distinct gearbox units rather than a shared transmission housing.

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