The automatic 2022 Kia Stonic doesn’t shift into 6th gear — how can I fix this?

When a 2022 Kia Stonic automatic fails to shift into 6th gear, it is understandable to have concerns—especially if the vehicle is still under warranty.

However, this type of issue can be addressed with clear and well-documented steps. The affected owner should:

• Request a technical appointment at the nearest official Kia dealership.
• Clearly explain that 6th gear does not engage under normal conditions (for example, at 120 km/h or in automatic mode).
• Ask for a full inspection of the transmission system (transmission fluid, sensors, solenoids, or the mechatronic unit).
• Request that they connect an OBD-II diagnostic scanner and provide a report listing any detected fault codes.
• Keep a copy of the diagnostic report and service order, signed by the technician or workshop manager.

If the dealership refuses to perform proper checks, or if the vehicle is still under warranty and no clear solution is offered, you can escalate the complaint directly to Kia through their official website, or file a free claim on Xolvie including all supporting documents.