Harsh upshifts, downshifts, or jolting in lower gears when accelerating

Bulletin number

LI27.00-P-080462

Component

Power train

Summary

Complaint Harsh upshifts, downshifts, or jolting in lower gears when accelerating. Cause Incorrectly installed (rotated) rotational speed sensors on the EHS (VGS Control Unit) can cause abnormalities in signals. As a result, poor adaptation values are stored and harsh gearshifts are felt. This only affects vehicles with VGS control units produced between days 185‑296 of 2025 (July 4, 2025‑ October 23, 2025). It is possible to check the production date of the VGS through the EEPROM .txt file (Figure 1) or on the VGS hardware (Figure 2). Remedy If the production date is or is within 25185‑25296 (07/4/25‑10/23/25): IPR will recognize these cases and advise updating of VGS software. Please ensure your XENTRY has all the latest Addons installed before proceeding. 1. Perform IPR and follow recommended steps • update VGS software • perform standstill adaptation Hardware replacement is no longer necessary for this root cause! 2. Perform 5‑7x driving adaptations of 3‑4 upshift and 5‑4 downshift • use the attached guide and steps below, (also found in Startek NG > Passenger > Drivetrain) for the 5‑4 downshift: ‑ Start the coast or braking from a higher engine speed (if the vehicle shifts into 6th, restart the acceleration up to 5th gear) • 5‑7 downshifts in Comfort while coasting • 5‑7 downshifts in Sport while coasting • 5‑7 downshifts in Comfort with consistent light to medium braking • 5‑7 downshifts in Sport with consistent light to medium braking If the production date is outside of this range: This LI is not applicable. 1. Perform IPR and follow recommended instruction

Owners of these vehicles have filed 9 complaints in the transmission category.