BMW i4, G26 (USA)

Additional Notes

• The BMW i4 G26 carries an e-transmission fluid capacity range of 0.5–2.1 liters across all four variants, a spread that reflects the difference between a partial top-up and a more complete service fill rather than a fixed single-volume specification.
• The 0.5-liter lower bound represents a minimal correction quantity, typically associated with a fluid level check and minor replenishment, while the 2.1-liter upper bound corresponds to a fuller drain-and-refill procedure on the e-transmission.
• All four variants — i4 M50, i4 eDrive35, i4 eDrive40, and i4 xDrive40 — share the identical 0.5–2.1 liter capacity specification under normal use conditions, indicating no differentiation in fluid volume requirements between single-motor and dual-motor configurations.
• The e-transmission designation across all listed variants refers to an electric drive unit gearbox rather than a conventional stepped automatic transmission, meaning the fluid serves lubrication and thermal management functions within an electrically driven reduction gear assembly.
• The i4 eDrive35 entered the specification set starting in 2022, while the i4 M50 and i4 eDrive40 are listed from 2021, reflecting a staggered introduction of variants within the G26 generation.
• The i4 xDrive40 carries the latest start year among the listed variants at 2023, and despite the addition of a second drive unit inherent to the xDrive all-wheel-drive system, the fluid capacity specification remains within the same 0.5–2.1 liter range as the single-motor variants.
• All capacity figures are tied exclusively to normal use conditions, with no separate severe-use or first-change-only interval specified in the available data for any of the four variants.