Porsche Boxster, 981 (USA)

Automatic transmission fluid capacity & service interval

Porsche Boxster, 981 (USA) automatic transmission fluid capacity ranges from 2,9 to 5,3 liters. Service intervals include 60000 miles or 72 months and 120000 miles or 144 months. The data covers 6 configurations.

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

TypeSpecifications
  • Boxster GTS (2015-2016)
  • Clutch part
  • Use: Normal
  • Capacity 5,3 liter
  • Change 60000 miles/ 72 months
  • Code: CG2.25 / ZF 7DT45
  • Boxster GTS (2015-2016)
  • Transmission part
  • Use: Normal
  • Capacity 2,9 liter
  • Change 144 months/ 120000 miles
  • Code: CG2.25 / ZF 7DT45 7/1
  • Boxster (2012-2016)
  • Clutch part
  • Use: Normal
  • Capacity 5,3 liter
  • Change 60000 miles/ 72 months
  • Code: CG2.05 / ZF 7DT45
  • Boxster (2012-2016)
  • Transmission part
  • Use: Normal
  • Capacity 2,9 liter
  • Change 144 months/ 120000 miles
  • Code: CG2.05 / ZF 7DT45 7/1
  • Boxster S (2012-2016)
  • Clutch part
  • Use: Normal
  • Capacity 5,3 liter
  • Change 60000 miles/ 72 months
  • Code: CG2.25 / ZF 7DT45
  • Boxster S (2012-2016)
  • Transmission part
  • Use: Normal
  • Capacity 2,9 liter
  • Change 144 months/ 120000 miles
  • Code: CG2.25 / ZF 7DT45 7/1

Additional Notes

  • The Porsche Boxster 981 (USA) uses a semi-automatic transaxle that is serviced in two distinct parts: a clutch part and a transmission part, each with separate fluid capacities and change intervals.
  • The clutch part of the transaxle holds 5.3 liters of fluid across all three trims — Boxster, Boxster S, and Boxster GTS — indicating a consistent fill volume regardless of engine specification.
  • The transmission part of the transaxle carries a 2.9-liter capacity, which is notably smaller than the clutch part's 5.3 liters, reflecting the distinct fluid circuits within the semi-automatic transaxle assembly.
  • Under normal use conditions, the clutch part fluid is due for a change at 60,000 miles or 72 months, whichever comes first, applying equally to the Boxster, Boxster S, and Boxster GTS trims.
  • The transmission part fluid operates on a significantly longer service interval of 120,000 miles or 144 months under normal use conditions, which is double the mileage and time threshold of the clutch part interval.
  • The divergence between the two intervals — 60,000 miles for the clutch part versus 120,000 miles for the transmission part — reflects the different rates of fluid degradation within each section of the transaxle under normal operating conditions.
  • The Boxster GTS shares identical fluid capacities and service intervals with the base Boxster and Boxster S for both transaxle parts, despite the GTS designation typically indicating a higher-output engine configuration.
  • All six specification rows carry a normal use condition designation, meaning no severe-duty interval variations are listed for any trim or transaxle section within the 2012-2016 model range.

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