Hyundai IONIQ, AE (EU)

Differential fluid capacity & service interval

Hyundai IONIQ, AE (EU) differential fluid capacity ranges from 1 to 1,4 liters. Service intervals include checks at 48 months or 60000 km and fluid changes at 120000 km. The data covers 4 configurations.

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

TypeSpecifications
  • IONIQ Electric 38 kWh (2019-2022)
  • Reduction gear unit
  • Use: Normal
  • Capacity 1-1,1 liter
  • Check 48 months/ 60000 km
  • IONIQ Electric 38 kWh (2019-2022)
  • Reduction gear unit
  • Use: Severe
  • Capacity 1-1,1 liter
  • Check 60000 km/ 48 months
  • Change 120000 km
  • IONIQ Electric 28 kWh (2016-2019)
  • Reduction gear unit
  • Use: Normal
  • Capacity 1,2-1,4 liter
  • Check 48 months/ 60000 km
  • IONIQ Electric 28 kWh (2016-2019)
  • Reduction gear unit
  • Use: Severe
  • Capacity 1,2-1,4 liter
  • Check 60000 km/ 48 months
  • Change 120000 km

Additional Notes

  • The Hyundai IONIQ AE (EU) differential fluid specifications cover the reduction gear unit, which is the component in electric vehicles that replaces a conventional multi-speed transmission by stepping down motor speed to a usable wheel-driving ratio.
  • The 28 kWh variant (2016-2019) carries a fluid capacity range of 1.2-1.4 liters for the reduction gear unit, while the 38 kWh variant (2019-2022) specifies a narrower and slightly lower range of 1.0-1.1 liters, indicating a measurable difference in unit size between the two battery configurations.
  • A capacity expressed as a range rather than a fixed value typically reflects acceptable fill tolerance during a service procedure, where the technician fills to a level indicator rather than a precise measured volume.
  • Under normal use conditions, both the 28 kWh and 38 kWh variants share the same inspection interval structure: a fluid check at 48 months or 60,000 km, whichever comes first, with no scheduled fluid change listed for that condition.
  • Under severe use conditions, both variants specify a fluid check at 60,000 km or 48 months, followed by a fluid change at 120,000 km, introducing a mandatory replacement interval that is absent from the normal use schedule.
  • The check interval timing is identical across both use conditions at 48 months or 60,000 km, but the ordering of those two criteria is reversed between normal and severe rows, which reflects a difference in how the interval priority is expressed rather than a difference in the interval itself.
  • The 120,000 km change interval under severe conditions applies to both electric variants without distinction, meaning the fluid replacement schedule at that mileage point is consistent regardless of battery capacity.

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