Within the next month, someone started calling the shop at odd hours. Silence at the other end, a static that hovered like a held breath. Once, on his answering machine, there was a single message: "Leave it alone." The voice was distorted but human, and Jonas could not tell if it was a warning or a threat.

The current dealership-level diagnostic and repair software. It is much more comprehensive and runs better on Windows 10.

While newer systems like ISTA+ have largely superseded TIS for newer vehicles, the remains a staple in the digital toolbox. It stands as a definitive record of BMW engineering at its peak, ensuring that the cars built during this era can remain on the road for decades to come.