BOS – Brake Override System

A Brake Override System (BOS) is a system that detects when the driver is pressing both the brake and the accelerator at the same time, and is able to automatically slow the car down (overriding the fact that the accelerator is being pressed).

It works on the theory that pressing both the brake and accelerator at the same time is not normal behaviour and that the probable intention of the driver is to slow the car down.