What common issue can be flagged regarding a vehicle's battery during a Class D inspection?

Corrosion on terminals or loose connections is a common issue that can be flagged during a Class D inspection because these conditions can significantly impact the vehicle's electrical system and overall performance. When there is corrosion on the battery terminals, it can create a poor electrical connection, leading to starting difficulties and malfunctions in electrical components. Loose connections may also result in intermittent power supply issues, impacting functions such as the ignition system and accessories. Properly functioning terminals are essential for ensuring reliable starts and the efficient operation of vehicle electronics, making this a critical area of focus during inspections.