Which of the following is a common indicator of vehicle maintenance needs?

The brake warning light is a common indicator of vehicle maintenance needs because it alerts the driver to potential issues with the braking system. This system is crucial for the safe operation of the vehicle, and any warning light related to it should be taken seriously. When the brake warning light illuminates, it can indicate problems such as low brake fluid levels, worn-out brake pads, or issues with the brake system itself. Addressing these problems promptly is essential for ensuring safety on the road.

While other options also indicate maintenance needs, the brake warning light serves a clear and direct function tied specifically to the critical component of braking, making it a particularly reliable warning of when immediate attention is required. Smoke from the exhaust, rattling sounds from the engine, and unusual tire wear can all suggest various maintenance issues but are not as universally applicable or urgent as signals from the brake system.