Vauxhall Astra K, B16

Automatic transmission fluid capacity & service interval

Vauxhall Astra K, B16 automatic transmission fluid capacity ranges from 1,5 to 9,5 liters. Service intervals require checks every 12 months or 30000 km. The data covers 6 configurations.

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

TypeSpecifications
Astra K 1.5 CDTI (90 kW) (2019-2022)
  • Use: Normal
  • Capacity 8,5-9,5 liter (Dry fill)
  • Capacity 5-6 liter (Service fill)
  • Capacity 2-3 liter (Transmission valve body)
  • Code: 9T45 9/1
Astra K 1.0 Turbo (66 kW) (2018-2019)
  • Use: Normal
  • Capacity 1,6 liter (Dry fill)
  • Capacity 1,5 liter (Refill)
  • Check 12 months/ 30000 km
  • Code: F17 MTA 5/1
Astra K 1.0 Turbo (77 kW) (2018-2019)
  • Use: Normal
  • Capacity 1,6 liter (Dry fill)
  • Capacity 1,5 liter (Refill)
  • Check 12 months/ 30000 km
  • Code: F17 MTA 5/1
Astra K 1.6 CDTI (100 kW) (2018-2019)
  • Use: Normal
  • Capacity 8-8,5 liter (Dry fill)
  • Capacity 4-6 liter (Service fill)
  • Check 12 months/ 30000 km
  • Code: 6T40/6T45/6T50 6/1
Astra K 1.6 Turbo (147 kW) (2018-2019)
  • Use: Normal
  • Capacity 8-8,5 liter (Dry fill)
  • Capacity 4-6 liter (Service fill)
  • Check 12 months/ 30000 km
  • Code: 6T40/6T45/6T50 6/1
Astra K 1.0 Turbo (77 kW) (2015-2018)
  • Use: Normal
  • Capacity 1,6 liter (Dry fill)
  • Capacity 1,5 liter (Refill)
  • Check 12 months/ 30000 km
  • Code: F17 MTA 5/1

Additional Notes

  • The semi-automatic transaxle fitted to the Vauxhall Astra K 1.0 Turbo variants holds 1.6 liters on a dry fill, while a refill requires only 1.5 liters. The 0.1-liter difference accounts for residual fluid retained in internal passages and the torque converter when the unit is not fully stripped.
  • All three 1.0 Turbo semi-automatic configurations share identical capacity figures of 1.6 liters dry and 1.5 liters refill, despite covering different power outputs of 66 kW and 77 kW across the 2015-2019 period.
  • The check interval for the 1.0 Turbo semi-automatic transaxle is set at 12 months or 30,000 km under normal use conditions, whichever comes first. This dual-trigger format means high-mileage vehicles reach the interval on distance, while lower-mileage vehicles reach it on time.
  • The 1.5 CDTI (90 kW) automatic transaxle carries a dry fill range of 8.5-9.5 liters, which is notably higher than the 8-8.5 liter dry fill specified for the 1.6 CDTI (100 kW) and 1.6 Turbo (147 kW) units. The wider range on the 1.5 CDTI reflects greater variability during a full overhaul fill procedure.
  • A transmission valve body capacity of 2-3 liters is listed separately for the 1.5 CDTI (90 kW) automatic transaxle. The valve body is a self-contained hydraulic control unit within the transmission, and a dedicated capacity figure indicates fluid servicing can be performed at that subassembly level independently of a full drain.
  • The 1.5 CDTI (90 kW) automatic transaxle has a service fill range of 5-6 liters, meaning a routine fluid change without full disassembly replaces roughly 55-70% of the total dry fill volume. Residual fluid in the torque converter and cooler lines accounts for the remainder.
  • The 1.6 CDTI (100 kW) and 1.6 Turbo (147 kW) automatics share an identical dry fill range of 8-8.5 liters and a service fill range of 4-6 liters, alongside the same 12-month or 30,000 km check interval under normal use conditions. The shared figures suggest both variants use the same or closely related automatic transaxle assembly.
  • The service fill range of 4-6 liters on the 1.6 CDTI and 1.6 Turbo automatics is notably wider than the 5-6 liter range on the 1.5 CDTI. A broader service fill range typically reflects greater variation in how much fluid drains depending on procedure, temperature, and whether the torque converter is drained separately.

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