Mazda B series (EU)

Differential fluid capacity & service interval

Mazda B series (EU) uses differential fluid with a capacity of 1,3 liters. Service intervals include changes at 1000 km and 18000 km. The data covers 2 configurations.

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

TypeSpecifications
  • B 1600, BNA61 (1971-1976)
  • Rear
  • Use: Normal
  • Capacity 1,3 liter
  • Change 18000 km
  • B 1600, BNA61 (1971-1976)
  • Rear
  • Use: Initial service
  • Capacity 1,3 liter
  • Change 1000 km

Additional Notes

  • The Mazda B Series (EU) B 1600 BNA61 rear differential holds 1.3 liters of fluid, a figure that applies consistently across both the normal service and initial service fill conditions.
  • Under normal use conditions, the rear differential fluid on the B 1600 BNA61 carries a change interval of 18,000 km, reflecting a standard long-term maintenance cycle for the unit.
  • An initial service change interval of 1,000 km is specified for the B 1600 BNA61 rear differential, a notably short interval tied to the break-in period when metal particles from new gear surfaces are most likely to contaminate the fluid.
  • The 1,000 km initial service interval and the 18,000 km normal interval represent an 18-fold difference in change frequency, illustrating how early operational wear demands more frequent fluid renewal than steady-state use on the B 1600 BNA61.

Other Systems