Porsche 911, 997 (USA)

Differential fluid capacity & service interval

Porsche 911, 997 (USA) differential fluid capacity ranges from 0,9 to 1,2 liters. The service interval is 120000 miles or 120 months. The data covers 6 configurations.

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

TypeSpecifications
  • 911 Carrera (2005-2008)
  • From automatic
  • Use: Normal
  • Capacity 1,2 liter
  • Change 120000 miles/ 120 months
  • 911 Carrera 4 (2005-2008)
  • From automatic
  • Use: Normal
  • Capacity 1,2 liter
  • Change 120000 miles/ 120 months
  • 911 Carrera 4 (2005-2008)
  • Front
  • Use: Normal
  • Capacity 0,9 liter
  • Change 120000 miles/ 120 months
  • 911 Carrera 4S (2005-2008)
  • From automatic
  • Use: Normal
  • Capacity 1,2 liter
  • Change 120000 miles/ 120 months
  • 911 Carrera 4S (2005-2008)
  • Front
  • Use: Normal
  • Capacity 0,9 liter
  • Change 120000 miles/ 120 months
  • 911 Carrera S (2004-2008)
  • From automatic
  • Use: Normal
  • Capacity 1,2 liter
  • Change 120000 miles/ 120 months

Additional Notes

  • The Porsche 911 997 (USA) differential fluid capacity for the rear differential (noted as "from automatic") is 1.2 liters across the 911 Carrera, Carrera 4, Carrera 4S, and Carrera S configurations for model years 2005-2008, with the Carrera S coverage beginning in 2004.
  • The 911 Carrera S carries the earliest model year entry among the listed configurations, with rear differential fluid specifications starting from 2004 rather than 2005.
  • All-wheel drive variants — the Carrera 4 and Carrera 4S (2005-2008) — include a front differential with a separate fluid capacity of 0.9 liters, which is a distinct service point not present in the rear-wheel drive Carrera and Carrera S entries.
  • The 0.9-liter front differential capacity on the Carrera 4 and Carrera 4S is smaller than the 1.2-liter rear differential capacity, reflecting the typically more compact front differential housing used in all-wheel drive rear-engine platforms.
  • All six specification rows share an identical service interval of 120,000 miles or 120 months under normal use conditions, indicating a consistent long-life fluid change schedule across all listed 997 differential positions.
  • The 120-month time limit runs parallel to the 120,000-mile mileage limit, meaning whichever threshold is reached first would govern the service interval regardless of accumulated mileage.
  • All specifications are designated for normal use conditions, meaning no separate severe-use interval is listed for any of the differential positions across the covered model years.

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