Mazda B, UN (EU)

Transfer case fluid capacity & service interval

Mazda B, UN (EU) transfer case fluid capacity is 2 liters. Service intervals include checks at 15000 km or 12 months and 20000 km, with fluid changes at 30000 km or 24 months, 40000 km or 24 months, and 45000 km or 36 months. The data covers 5 configurations.

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

TypeSpecifications
B2500 D 4WD (1999-2006)
  • Use: Normal
  • Capacity 2 liter
  • Check 20000 km
  • Change 40000 km/ 24 months
B2500 TD 4WD (1999-2006)
  • Use: Normal
  • Capacity 2 liter
  • Check 20000 km
  • Change 40000 km/ 24 months
B2600 4WD (1999-2006)
  • Use: Normal
  • Capacity 2 liter
  • Check 15000 km/ 12 months
  • Change 45000 km/ 36 months
B2600 4WD (1998-1999)
  • Use: Normal
  • Capacity 2 liter
  • Check 15000 km/ 12 months
  • Change 30000 km/ 24 months
B2500 D 4WD (1997-1999)
  • Use: Normal
  • Capacity 2 liter
  • Check 20000 km
  • Change 40000 km/ 24 months

Additional Notes

  • All five 4WD configurations in the Mazda B, UN (EU) range share a transfer case fluid capacity of 2 liters. This figure represents a service fill volume, typical for a compact transfer box of this type rather than a full overhaul or dry-fill quantity.
  • The B2500 D 4WD across both its 1997-1999 and 1999-2006 production periods carries identical transfer case service intervals: a fluid level check every 20,000 km and a full fluid change every 40,000 km or 24 months, whichever comes first. Both intervals apply under normal use conditions.
  • The B2500 TD 4WD (1999-2006), the turbodiesel variant, shares the same 2-liter capacity and the same 20,000 km check and 40,000 km/24-month change schedule as the naturally aspirated B2500 D 4WD of the same period, despite the difference in engine specification.
  • The B2600 4WD (1998-1999) has a more frequent check interval than the B2500 variants, with fluid level inspection required every 15,000 km or 12 months under normal use. The change interval is set at 30,000 km or 24 months.
  • Between the two B2600 4WD production periods, the change interval was extended from 30,000 km/24 months in the 1998-1999 specification to 45,000 km/36 months in the 1999-2006 specification, while the check interval of 15,000 km/12 months remained unchanged. Both periods retain the same 2-liter capacity.
  • The B2600 4WD check interval of 15,000 km is shorter than the 20,000 km check interval applied to the B2500 D and B2500 TD variants, reflecting a difference in service scheduling between the petrol and diesel-engined 4WD models within the same range.

Other Systems