INFINITI M, Y34 (USA)

Automatic transmission fluid capacity & service interval

INFINITI M, Y34 (USA) models require automatic transmission fluid with a capacity range between min and max. Service intervals include checking at 15000 miles or 12 months and changing at 30000 miles or 24 months. The data covers 4 configurations.

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

TypeSpecifications
M45 (2004-2005)
  • Use: Normal
  • Between min and max.
  • Check 15000 miles/ 12 months
  • Code: 5/1
M45 (2004-2005)
  • Use: Severe
  • Between min and max.
  • Change 30000 miles/ 24 months
  • Code: 5/1
M45 (2003-2003)
  • Use: Normal
  • Between min and max.
  • Check 15000 miles/ 12 months
  • Code: 5/1
M45 (2003-2003)
  • Use: Severe
  • Between min and max.
  • Change 30000 miles/ 24 months
  • Code: 5/1

Additional Notes

  • Across all model years covered, the automatic transmission fluid capacity for the INFINITI M Y34 (USA) is expressed as "between min and max" rather than a fixed volume, indicating a level-based fill method rather than a measured quantity refill.
  • A level-based specification of this kind is typical for sealed or semi-sealed automatic transmissions where fluid is verified against dipstick or overflow plug references rather than poured to a set quart or liter figure.
  • Under normal use conditions for the 2003 M45, the service interval calls for a fluid check at 15,000 miles or 12 months, whichever comes first, with no fluid change required at that interval.
  • Under severe use conditions for the 2003 M45, the interval shifts to a fluid change at 30,000 miles or 24 months, meaning the fluid is replaced rather than simply inspected.
  • The 2004-2005 M45 carries identical interval structures to the 2003 model year, with a normal-use check at 15,000 miles or 12 months and a severe-use change at 30,000 miles or 24 months.
  • The gap between the normal-use check interval and the severe-use change interval is notable: severe service doubles the mileage threshold but requires an actual fluid exchange, reflecting the greater thermal and mechanical stress placed on transmission fluid under demanding operating conditions.

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