Subaru WRX, VA (USA / CAN)

Brake fluid capacity & service interval

Subaru WRX, VA (USA / CAN) brake fluid capacity ranges between min and max values. Service intervals consist of 30000 miles or 30 months and 15000 miles or 15 months. The data covers 6 configurations.

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

TypeSpecifications
WRX STI 2.5T (2018-2021)
  • Use: Normal
  • Between min and max.
  • Change 30000 miles/ 30 months
WRX STI 2.5T (2018-2021)
  • Use: Severe
  • Between min and max.
  • Change 15000 miles/ 15 months
WRX 2.0T (2014-2021)
  • Use: Normal
  • Between min and max.
  • Change 30000 miles/ 30 months
WRX 2.0T (2014-2021)
  • Use: Severe
  • Between min and max.
  • Change 15000 miles/ 15 months
WRX STI 2.5T (2014-2018)
  • Use: Normal
  • Between min and max.
  • Change 30000 miles/ 30 months
WRX STI 2.5T (2014-2018)
  • Use: Severe
  • Between min and max.
  • Change 15000 miles/ 15 months

Additional Notes

  • For the Subaru WRX VA (USA / CAN), brake fluid capacity across all listed configurations is expressed as a fill level between the reservoir minimum and maximum marks rather than as a fixed volume, which is standard for hydraulic brake system service fills where the existing fluid is not fully evacuated.
  • The WRX 2.0T covering 2014-2021 carries a normal-use brake fluid change interval of 30,000 miles or 30 months, whichever comes first.
  • Under severe-use conditions, the WRX 2.0T interval is halved to 15,000 miles or 15 months, reflecting the accelerated fluid degradation associated with more demanding driving cycles.
  • The WRX STI 2.5T shares the same normal-use interval of 30,000 miles or 30 months across both the 2014-2018 and 2018-2021 model year groupings.
  • Severe-use service for the WRX STI 2.5T likewise mirrors the 2.0T at 15,000 miles or 15 months, applying equally to both the 2014-2018 and 2018-2021 entries.
  • The WRX STI 2.5T appears under two separate year-range entries, 2014-2018 and 2018-2021, each carrying identical interval specifications for both normal and severe use conditions.
  • Brake fluid is hygroscopic, meaning moisture absorption over time lowers its boiling point, which is the underlying reason time-based intervals in months run alongside mileage-based intervals rather than mileage alone governing the change schedule.

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