What must be inspected annually to confirm the safe operation of a vehicle's cooling system?

To ensure the safe operation of a vehicle's cooling system, it is essential to inspect the cooling system hoses annually. These hoses are critical components as they transport coolant throughout the vehicle's engine and radiator, helping to regulate engine temperature and prevent overheating. Over time, hoses can become brittle, cracked, or develop leaks, which can lead to catastrophic engine damage if not addressed.

Regular inspection of these hoses allows for the identification of wear and potential failure points before they result in a breakdown or loss of cooling efficiency. Maintaining the integrity of the cooling system is vital not only for the engine's performance but also for the overall safety of the vehicle.

In contrast, while brake pads, battery condition, and transmission fluid levels are important for vehicle performance and safety, they do not specifically relate to the cooling system's operation.