Registrations of new cars plummeted about 24% last month compared with June 2021, according to the Society of Motor Manufacturers and Traders (SMMT).
Manufacturers have had problems fulfilling orders due to global shortages of semiconductors, the trade body said.
The supply chain issues have been driven by surging demand for consumer products that contain computer chips and pandemic-related disruptions in production such as lockdowns in China.
Drivers are facing wait times of more than a year for some models.