Mazda BT-50, J97M (EU)

Transfer case fluid capacity & service interval

Mazda BT-50, J97M (EU) transfer case fluid capacity ranges from 1,2 to 1,85 liters. Service intervals consist of checks every 40000 km or 24 months and changes every 80000 km or 48 months. The data covers 3 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 1,85 liter
  • Check 40000 km/ 24 months
  • Change 80000 km/ 48 months
  • Code: S15MX-D
BT-50 3.0 CDVi (2006-2011)
  • Use: Normal
  • Capacity 1,2 liter
  • Code: 5R55S
BT-50 3.0 CDVi (2006-2011)
  • Use: Normal
  • Capacity 1,85 liter
  • Check 40000 km/ 24 months
  • Change 80000 km/ 48 months
  • Code: S15MX-D

Additional Notes

  • The Mazda BT-50 J97M (EU) transfer case fluid capacity varies between the 2.5 CDVi and 3.0 CDVi engines, with the 2.5 CDVi holding 1.85 liters and the 3.0 CDVi listed at both 1.2 liters and 1.85 liters depending on the configuration.
  • The 1.2-liter capacity figure for the 3.0 CDVi transferbox represents a notably smaller fill volume compared to the 1.85-liter figure associated with the same engine, indicating a difference between two distinct transfer case assemblies fitted to that variant.
  • The 1.85-liter capacity appears across both the 2.5 CDVi and one 3.0 CDVi configuration, suggesting at least one shared transfer case unit between the two engine variants during the 2006-2011 production span.
  • Under normal use conditions, the 2.5 CDVi and the 1.85-liter 3.0 CDVi configurations share identical service intervals, with a fluid level check specified 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 means the transfer case fluid is replaced roughly every four years or every other check interval, as the check interval falls at exactly half the change interval in both distance and time terms.
  • No service interval data is listed for the 3.0 CDVi configuration carrying the 1.2-liter capacity, meaning only the fill volume is specified for that particular transferbox entry.

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