Porsche Boxster, 986 (EU)

Manual transmission fluid capacity & service interval

Porsche Boxster, 986 (EU) manual transmission fluid capacity ranges from 2,25 to 2,8 liters. Service intervals include checks every 20000 km or 12 months and fluid changes 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 2,8 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: G86.20 6/1
Boxster (2002-2005)
  • Use: Normal
  • Capacity 2,25 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: G86.00 / G86.01 5/1
Boxster S (2002-2005)
  • Use: Normal
  • Capacity 2,8 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: G86.20 6/1
Boxster (1999-2002)
  • Use: Normal
  • Capacity 2,25 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: G86.00 / G86.01 5/1
Boxster S (1999-2002)
  • Use: Normal
  • Capacity 2,8 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: G86.20 6/1
Boxster (1996-1999)
  • Use: Normal
  • Capacity 2,3 liter
  • Check 20000 km/ 12 months
  • Change 160000 km
  • Code: G86.00 / G86.01 5/1

Additional Notes

  • The Porsche Boxster 986 (EU) manual transaxle fluid capacity shifted from 2.3 liters in the 1996-1999 model to 2.25 liters from 1999 onward, a small but measurable reduction that reflects a design revision between those production periods.
  • The Boxster S variants produced from 1999-2005 carry a notably larger transaxle capacity of 2.8 liters, compared to the 2.25-liter figure for the standard Boxster of the same period, consistent with the S model housing a physically larger gearbox unit to handle its higher-output engine.
  • The Boxster S 550 Spyder (2004-2005) shares the same 2.8-liter transaxle capacity as the standard Boxster S across the 1999-2005 range, indicating the same manual transaxle unit is used despite the 550 Spyder's limited-edition status.
  • All six configurations share an identical fluid check interval of every 20,000 km or 12 months, whichever comes first. The dual condition means time elapsed can trigger a service even when mileage accumulation is low.
  • The fluid change interval of 160,000 km applies uniformly across all Boxster 986 (EU) manual transaxle configurations from 1996-2005. At that mileage threshold, a full drain and refill is specified rather than a top-up or partial exchange.
  • All specifications are listed under normal use conditions, meaning the check and change intervals stated apply to standard driving environments rather than elevated-stress scenarios such as track use or extreme temperatures.
  • The 2.3-liter capacity of the early 1996-1999 Boxster transaxle represents a service fill volume, meaning the quantity of fluid required to bring a properly drained unit back to the correct operating level rather than a total system volume including residual fluid in passages.

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