Hyundai IONIQ, AE (USA)

Automatic transmission fluid capacity & service interval

Hyundai IONIQ, AE (USA) automatic transmission fluid capacity is 1,6-1,7 liters. Service intervals include checking at 37500 miles or 30 months and changing at 75000 miles. The data covers 4 configurations.

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

TypeSpecifications
IONIQ Hybrid 1.6 GDI (2017-2022)
  • Use: Normal
  • Capacity 1,6-1,7 liter
  • Check 37500 miles/ 30 months
  • Code: D6KF1 6/1
IONIQ Hybrid 1.6 GDI (2017-2022)
  • Use: Severe
  • Capacity 1,6-1,7 liter
  • Check 37500 miles/ 30 months
  • Change 75000 miles
  • Code: D6KF1 6/1
IONIQ Plug-in Hybrid 1.6 GDI (2017-2022)
  • Use: Normal
  • Capacity 1,6-1,7 liter
  • Check 37500 miles/ 30 months
  • Code: D6KF1 6/1
IONIQ Plug-in Hybrid 1.6 GDI (2017-2022)
  • Use: Severe
  • Capacity 1,6-1,7 liter
  • Check 37500 miles/ 30 months
  • Change 75000 miles
  • Code: D6KF1 6/1

Additional Notes

  • The Hyundai IONIQ AE uses a semi-automatic transaxle rather than a conventional stepped automatic transmission, which accounts for the relatively small fluid capacity of 1.6–1.7 liters across all listed configurations.
  • Both the Hybrid and Plug-in Hybrid 1.6 GDI variants share an identical capacity range of 1.6–1.7 liters, indicating a common transaxle unit across the two powertrain types for the 2017-2022 model years.
  • The 1.6–1.7 liter capacity figure represents a service fill volume, consistent with a fluid check or partial drain-and-refill procedure rather than a full overhaul capacity.
  • Under normal use conditions, the service schedule for both the Hybrid and Plug-in Hybrid specifies only a fluid check at 37,500 miles or 30 months, with no fluid change interval listed.
  • Under severe use conditions, the same 37,500-mile or 30-month check interval applies, but a fluid change is additionally specified at 75,000 miles for both the Hybrid and Plug-in Hybrid variants.
  • The 30-month time-based check interval runs alongside the 37,500-mile mileage interval, meaning whichever threshold is reached first would govern the service timing under both normal and severe conditions.
  • The severe-use change interval of 75,000 miles is exactly double the 37,500-mile check interval, suggesting the fluid check at the midpoint serves as a condition assessment before the full change is due.

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