INFINITI M, Y34 (USA)

Coolant capacity & service interval

INFINITI M, Y34 (USA) models utilize coolant with a capacity range of 0,8 to 9,8 liters. Service intervals for coolant changes are 30000 miles or 24 months and 60000 miles or 48 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
  • Capacity 0,8 liter (Reservoir)
  • Capacity 9,8 liter (Total)
  • Change 30000 miles/ 24 months
M45 (2004-2005)
  • Use: Initial service
  • Capacity 0,8 liter (Reservoir)
  • Capacity 9,8 liter (Total)
  • Change 60000 miles/ 48 months
M45 (2003-2003)
  • Use: Normal
  • Capacity 0,8 liter (Reservoir)
  • Capacity 9,8 liter (Total)
  • Change 30000 miles/ 24 months
M45 (2003-2003)
  • Use: Initial service
  • Capacity 0,8 liter (Reservoir)
  • Capacity 9,8 liter (Total)
  • Change 60000 miles/ 48 months

Additional Notes

  • The INFINITI M45 (Y34, USA) cooling system holds a total capacity of 9.8 liters, which represents the full system volume including the engine block, cylinder head passages, and radiator circuits combined.
  • A separate reservoir capacity of 0.8 liters is specified across all M45 configurations for 2003-2005, reflecting the overflow and expansion tank volume rather than the primary circuit fill.
  • Under normal use conditions, the M45 coolant change interval is set at 30,000 miles or 24 months, whichever comes first, applying to both the 2003 and 2004-2005 model year groups.
  • An initial service interval of 60,000 miles or 48 months is specified for the M45 across 2003-2005, doubling the normal change interval and applying only to the first scheduled coolant replacement from new.
  • The total and reservoir capacities of 9.8 liters and 0.8 liters remain unchanged between the 2003 model year and the 2004-2005 group, indicating no cooling system volume revision occurred across the M45 production span covered by these specifications.

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