It happened at Grand Mitsubishi in northwest suburban Bensenville.
Some customers say they went in for service Wednesday morning and found DuPage County Sheriff's cars in the parking lot.
Mitsubishi Motors Credit of America says it has taken possession of the inventory at Grand Mitsubishi. It said the dealer hadn't paid its debts to the company.
The DuPage County Sheriff says a court order was served Wednesday allowing the repossession.