An attempted cyber attack on Toyota Australia has affected its operations nationwide, but the company says its dealer network remains up and running.
The car marker has notified Australian government agencies, while its IT department works with international cyber-security experts to get the system back on track.
"Toyota Australia can confirm it has been the victim of an attempted cyber attack," a company statement reads.
"At this stage, we believe no private employee or customer data has been accessed."
The company has no details about the origin of the attack.
"The attempted cyber attack is impacting Toyota Australia's operations countrywide, however our dealer network is still operational," a company spokesman told AAP.
Employees are still at work on Thursday, despite the attempt to access the network.
The company apologised for any inconvenience to customers.
It comes after reports hackers broke into the medical files at Melbourne Heart Group, a tenant at the Cabrini Hospital, and demanded a ransom after scrambling the data of about 15,000 patients.
The Age reports the organisation has been unable to access the files for weeks after the cybercrime syndicate used malware to cripple its server.