If you are using a custom launcher or mod manager, use the "Verify Files" option to ensure your Cops.bnk or vehicular asset archives inside the Euro/Bnk/Vehicules folder have not been corrupted or accidentally deleted by a faulty car mod.

This is the most effective and widely recommended fix for the invisible police car bug. The goal is to force Test Drive Unlimited to run on a single CPU core. Since Windows 7, 8, and 10 attempt to spread the workload across multiple cores, this causes the game's logic to break. By manually limiting the game to one core, you restore the stable environment it was originally designed for.

Look for the police vehicle files. The default models usually include names like CHEV_COV_C6_PL.bnk or generic police identifiers.

The proposed fix will be thoroughly tested on various platforms, including Xbox, PlayStation, and PC, to ensure that the issue is resolved and no new problems are introduced.