We bought a 2026 x5 three months ago. One month in, it started to shift roughly. We took it in, and it's been there ever since. We were eventually told that the problem was low transmission fluid, which they could not immediately fix because there was a nationwide shortage of fluid(!). We've since heard that the transmission is incompatible with the transmission, and the solution is throttling back the power of the engine. Has anyone heard about any of this?