Which of the following must be present in a vehicle to comply with safety regulations?

A vehicle must have functioning windshield wipers to comply with safety regulations because they are essential for maintaining visibility in adverse weather conditions, such as rain or snow. Properly working windshield wipers help ensure that the driver can see the road clearly, which is critical for safe driving. Without this capability, the risk of accidents increases significantly, as a driver’s ability to react to obstacles or changes in traffic conditions could be compromised.

In contrast, while a cell phone charger, Bluetooth system, or custom seat covers may enhance comfort or convenience, they do not play a direct role in the fundamental safety of the vehicle. These items can be considered accessories rather than necessities for meeting safety standards. Thus, the importance of having functioning windshield wipers stands out clearly in relation to the safety compliance of a vehicle.