Mazda B series (EU)

Coolant capacity & service interval

Mazda B series (EU) requires 7 liters of coolant. Service intervals occur every 48000 km or 24 months. The data covers 1 configuration.

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

TypeSpecifications
B 1600, BNA61 (1971-1976)
  • Use: Normal
  • Capacity 7 liter
  • Change 48000 km/ 24 months

Additional Notes

  • The Mazda B series (EU) B 1600, BNA61 cooling system holds 7 liters of coolant, which represents a full system fill capacity covering the radiator, engine block passages, and associated hoses.
  • The 7-liter figure applies to the cooling system as a whole rather than a partial drain-and-fill, meaning a complete coolant exchange would require the full volume to be replaced.
  • Under normal use conditions, the coolant change interval for the B 1600, BNA61 is set at 48,000 km or 24 months, whichever comes first, reflecting a dual trigger based on both distance and elapsed time.
  • The 24-month time-based interval acknowledges that coolant degrades chemically over time regardless of mileage, so a vehicle driven infrequently would still reach a service point at the two-year mark.

Other Systems