Which instrument is NOT typically checked during a vehicle inspection?

The wireless transmitter is not typically checked during a vehicle inspection because it does not directly relate to the essential operational functions or safety of the vehicle. During a routine inspection, drivers focus on instruments that monitor key systems vital for safe operation, such as the ammeter, which indicates electrical current flow; the voltmeter, which measures the battery voltage and electrical system; and the temperature gauge, which tracks engine temperature to prevent overheating. Checking these instruments ensures that the vehicle's electrical and cooling systems are functioning properly, which are critical for safe driving.

In contrast, a wireless transmitter, while it may be part of the vehicle's technology features, does not impact the vehicle's essential performance or safety in the same way that the other instruments do. Therefore, it is not a standard item included in vehicle inspection protocols.