Introduction: What is vehicle audiohook.dll? In the world of Windows-based automotive infotainment systems, diagnostic tools, and aftermarket radio interfaces, you may encounter a file named vehicleaudiohook.dll . This file is a Dynamic Link Library (DLL) — a set of instructions that multiple programs can use simultaneously. Specifically, vehicleaudiohook.dll is most commonly associated with software that manages audio routing, vehicle sound processing, or hardware interaction (like steering wheel audio controls, external amplifiers, or diagnostic interfaces).