What safety feature in a vehicle can make it non-drivable when damaged?

A disabled airbag is a vital safety feature designed to protect passengers in the event of a collision. If the airbag system is damaged or malfunctioning, it can prevent the airbags from deploying, which significantly increases the risk of injury during an accident. In terms of vehicle safety integrity, many vehicles are designed to be non-drivable when critical systems like airbags are compromised. This is often implemented as a safety precaution to ensure that the vehicle is not operated until the issue is resolved, as driving without fully functional airbags could endanger the occupants in the event of a crash.

In contrast, while brake lights are important for signaling to other drivers, their failure does not immediately affect the vehicle's ability to drive. Windshield wipers are necessary for visibility but are not critical for the basic operation of the vehicle. Similarly, an engine cover, while it can provide some protection for engine components and enhance aesthetic appeal, does not impact the vehicle's driveability or safety in the same way that a malfunctioning airbag system would. Hence, when assessing which feature can render a vehicle non-drivable when damaged, the disabled airbag clearly stands out as the correct answer.