Toyota has confirmed that as many as 3.1 million items of Toyota and Lexus customer data may have been breached following an attack on dealerships in Japan . The company says that " information that may have been leaked this time does not include information on credit cards , " but customers are already on edge following the cyber - attack that hit Toyota Australia in February . Notification about the breach was published in the company newsroom last week . The statement said that there was " unauthorized access on the network " of a number of dealerships in the Tokyo area of Japan on March 21 . Up to 3.1 million pieces of customer data , stored on a server connected to that network , may have been compromised as a result . ;