Ford Sierra / Sapphire (EU)

Additional Notes

• Across all four transfer case configurations in the Ford Sierra / Sapphire (EU) lineup, the fluid capacity is 0.5 liter, a figure consistent with the compact, single-speed transfer boxes used in these all-wheel-drive variants.
• A 0.5-liter capacity is characteristic of a service fill specification, meaning the volume reflects the amount of fluid needed during a routine top-up or drain-and-refill, rather than a full overhaul or disassembly procedure.
• The Sierra XR 4x4i 2.8 V6 (1985-1989) carries a check interval of 20,000 km or 12 months under normal use conditions, making the time-based threshold notably shorter than the 24-month interval applied to later configurations.
• The 2.0i DOHC 4x4 / XR 4x4 (1990-1992), the RS Cosworth 4x4 (1990-1992), and the XR 4x4 2.9 V6 (1988-1992) all share a check interval of 20,000 km or 24 months under normal use, doubling the calendar-based frequency compared to the earlier 2.8 V6 variant.
• The shift from a 12-month to a 24-month time-based interval between the 2.8 V6 and the later configurations represents the most notable variation in transfer case service scheduling across the Ford Sierra / Sapphire range covered by these specifications.
• All four rows are designated under normal use conditions, meaning the stated intervals apply to standard operating environments rather than severe-duty cycles such as frequent towing, off-road use, or extreme temperature exposure.
• The XR 4x4 2.9 V6 (1988-1992) overlaps in production years with both the earlier 2.8 V6 and the later 1990-1992 models, yet follows the 24-month interval structure of the newer group rather than the 12-month schedule of the 2.8 V6.