Which of the following components is NOT part of the outside vehicle inspection?

The correct answer is that brake pads are not part of the outside vehicle inspection. The outside vehicle inspection primarily focuses on components that can be checked visually or from outside the vehicle, ensuring they are in good working condition and comply with safety regulations.

Lighting equipment is inspected for functionality, allowing the user to ensure all lights are operational, which is essential for visibility and communication with other road users. Tires are also examined as they significantly affect a vehicle's handling and overall safety; this includes checking tread depth and general condition. The gas cap test evaluates the integrity of the gas cap to prevent fuel evaporation and ensure emissions control.

In contrast, brake pads are internal components that require inspecting the braking system from within the vehicle, typically involving checking the thickness of the brake pads or assessing the condition of the braking mechanism. This inspection does not take place during the external safety inspection, which is why brake pads are correctly identified as the component not included in this specific inspection.