INFINITI QX55, J55X (USA)
Coolant capacity & service interval
INFINITI QX55, J55X (USA) models utilize coolant with a capacity of 7,7 liters. Service intervals consist of 75000 miles or 60 months and 105000 miles or 84 months. The data covers 4 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| QX55 2.0 AWD (2022- ) |
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| QX55 2.0 AWD (2022- ) |
|
| QX55 2.0 AWD (2021-2022) |
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| QX55 2.0 AWD (2021-2022) |
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Additional Notes
- The INFINITI QX55 2.0 AWD cooling system holds 7.7 liters of coolant across all listed configurations, a capacity consistent with a turbocharged four-cylinder engine and its associated cooling circuit volume.
- Under normal use conditions, the coolant change interval is set at 75,000 miles or 60 months, whichever comes first, applying to both the 2021-2022 and 2022-start configurations.
- A separate first-change-only interval of 105,000 miles or 84 months is specified alongside the normal interval, reflecting the extended service life of a factory-fill coolant formulation before the standard recurring schedule takes over.
- The 30,000-mile and 24-month gap between the first-change-only interval and the normal interval indicates that the initial factory coolant fill is rated for a meaningfully longer service period than subsequent refills.
- The 7.7-liter capacity figure represents a service fill volume for the cooling system as a whole, accounting for the radiator, engine block passages, heater core circuit, and reservoir.
- The 2021-2022 and 2022-start entries share identical capacity and interval values across both normal and first-change-only conditions, with no divergence in coolant specifications between the two configuration entries.