Porsche Boxster, 986 (EU)

Automatic transmission fluid capacity & service interval

Porsche Boxster, 986 (EU) automatic transmission fluid capacity ranges from 9,5 to 9,8 liters. Service intervals include checking every 20000 km or 12 months and changing every 160000 km. The data covers 6 configurations.

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

TypeSpecifications
Boxster S 550 Spyder (2004-2005)
  • Use: Normal
  • Capacity 9,8 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: Tiptronic A86.00 / A86.05 / A86.20 5/1
Boxster (2002-2005)
  • Use: Normal
  • Capacity 9,5 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: Tiptronic A86.00 / A86.05 / A86.20 5/1
Boxster S (2002-2005)
  • Use: Normal
  • Capacity 9,8 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: Tiptronic A86.00 / A86.05 / A86.20 5/1
Boxster (1999-2002)
  • Use: Normal
  • Capacity 9,5 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: Tiptronic A86.00 / A86.05 / A86.20 5/1
Boxster S (1999-2002)
  • Use: Normal
  • Capacity 9,8 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: Tiptronic A86.00 / A86.05 / A86.20 5/1
Boxster (1996-1999)
  • Use: Normal
  • Capacity 9,5 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: Tiptronic A86.00 / A86.05 / A86.20 5/1

Additional Notes

  • The Porsche Boxster 986 (EU) places the automatic transmission in a transaxle configuration, meaning the gearbox and final drive are housed together at the rear axle rather than alongside the engine. A transaxle fill capacity reflects the combined fluid volume for both the transmission and differential functions within that single unit.
  • The standard Boxster across the 1996-2005 model years carries a transaxle fluid capacity of 9.5 liters under normal use conditions. A capacity at this level is consistent with a full service fill of a rear-mounted transaxle unit rather than a partial drain-and-refill procedure.
  • The Boxster S variants from 1999-2005, along with the Boxster S 550 Spyder from 2004-2005, share a slightly higher transaxle capacity of 9.8 liters. The 0.3-liter difference relative to the standard Boxster aligns with the larger displacement engine fitted to the S models, which can influence transaxle sizing and fluid volume requirements.
  • All configurations across the full 1996-2005 range share an identical fluid check interval of every 20,000 km or 12 months, whichever comes first, under normal use conditions. The time-based component of 12 months accounts for fluid degradation that occurs independently of mileage accumulation.
  • The fluid change interval is specified at 160,000 km for all listed configurations under normal use conditions. At this interval, the fluid volume involved in a full transaxle service is the entire capacity figure, either 9.5 or 9.8 liters depending on the variant.
  • The specifications remain consistent across the three successive Boxster production periods of 1996-1999, 1999-2002, and 2002-2005, with no variation in capacity, check interval, or change interval across those periods for the standard model. The same pattern holds for the Boxster S across its 1999-2002 and 2002-2005 periods.

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