INFINITI FX, S51 (EU)

Brake fluid capacity & service interval

INFINITI FX, S51 (EU) models utilize brake fluid. Service intervals include checks at 15000 km/12 months or 20000 km/12 months, and changes at 15000 km/12 months, 20000 km/12 months, 30000 km/24 months, or 40000 km/24 months. The data covers 12 configurations.

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

TypeSpecifications
FX37, S51 (2011-2013)
  • Use: Normal
  • Between min and max.
  • Check 15000 km/ 12 months
  • Change 30000 km/ 24 months
FX37, S51 (2011-2013)
  • Use: Severe
  • Between min and max.
  • Change 15000 km/ 12 months
FX50, S51 (2011-2013)
  • Use: Normal
  • Between min and max.
  • Check 15000 km/ 12 months
  • Change 30000 km/ 24 months
FX50, S51 (2011-2013)
  • Use: Severe
  • Between min and max.
  • Change 15000 km/ 12 months
FX30d, S51 (2010-2013)
  • Use: Normal
  • Between min and max.
  • Check 20000 km/ 12 months
  • Change 40000 km/ 24 months
FX30d, S51 (2010-2013)
  • Use: Severe
  • Between min and max.
  • Change 20000 km/ 12 months
FX30d, S51 (2009-2010)
  • Use: Normal
  • Between min and max.
  • Check 15000 km/ 12 months
  • Change 30000 km/ 24 months
FX30d, S51 (2009-2010)
  • Use: Severe
  • Between min and max.
  • Change 15000 km/ 12 months
FX37, S51 (2008-2011)
  • Use: Normal
  • Between min and max.
  • Check 15000 km/ 12 months
  • Change 30000 km/ 24 months
FX37, S51 (2008-2011)
  • Use: Severe
  • Between min and max.
  • Change 15000 km/ 12 months
FX50, S51 (2008-2011)
  • Use: Normal
  • Between min and max.
  • Check 15000 km/ 12 months
  • Change 30000 km/ 24 months
FX50, S51 (2008-2011)
  • Use: Severe
  • Between min and max.
  • Change 15000 km/ 12 months

Additional Notes

  • Brake fluid capacity across all FX S51 configurations is expressed as a reservoir level range rather than a fixed volume, meaning the hydraulic brake system reservoir must be filled to a point between the marked minimum and maximum indicators on the reservoir body.
  • The INFINITI FX S51 brake fluid specifications distinguish between normal and severe use conditions, with severe use cutting the change interval to half the distance and time allowed under normal use across all listed configurations.
  • Under normal use, the FX30d S51 built in 2009-2010 carries a check interval of 15,000 km or 12 months and a change interval of 30,000 km or 24 months, while the 2010-2013 production range for the same variant was revised upward to a 20,000 km or 12-month check and a 40,000 km or 24-month change.
  • The FX30d S51 2010-2013 normal-use change interval of 40,000 km or 24 months is the longest brake fluid change interval listed across all configurations in these specifications, standing apart from the 30,000 km or 24-month interval shared by the FX37 and FX50 variants.
  • Under severe use, the FX30d S51 2009-2010 specifies a change at 15,000 km or 12 months, while the 2010-2013 revision raises the severe-use change interval to 20,000 km or 12 months, mirroring the proportional increase seen in the normal-use schedule for that production range.
  • The FX37 S51 brake fluid intervals remain consistent across both the 2008-2011 and 2011-2013 production ranges, with normal use specifying a 15,000 km or 12-month check and a 30,000 km or 24-month change, and severe use specifying a 15,000 km or 12-month change in both periods.
  • The FX50 S51 shares identical brake fluid service intervals with the FX37 S51 across both production ranges, with the same 15,000 km or 12-month check and 30,000 km or 24-month change under normal use, and a 15,000 km or 12-month change under severe use.
  • Brake fluid is hygroscopic, meaning it absorbs moisture from the atmosphere over time, which lowers its boiling point and can compromise braking performance under heat. The time-based component of the intervals, expressed in months alongside distance, reflects this degradation mechanism independent of vehicle use distance.

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