The announcement comes about a week after it was revealed that counterfeit airbag components had been sold to independent vehicle repairers, and a statement from Toyota Australia claims that two retailers had been selling the spiral cable - a crucial part that must be replaced each time the airbag deploys - which were advertised as genuine Toyota parts.
Toyota is taking the retailers - which have not been named - to court over "trademark infringement" and "misleading and deceptive conduct.
"We are concerned that customers have been misled into believing they have purchased a genuine Toyota part," a statement from the brand read.
"Internal testing found that the counterfeit airbag spiral cables are of inferior quality, which poses a number of potential risks to customers.
"All of our parts are subject to rigorous testing before they are sold to ensure they work correctly. Counterfeit parts do not undergo the same testing.
"It is our expectation that the independent retailers will contact the impacted customers to advise them that they have purchased counterfeit parts and replace the airbag spiral cable with a genuine Toyota part at no cost to the customer.
"We want to take this opportunity to reiterate to customers that the spiral cable would only have been replaced if their vehicle was involved in an accident and the airbag deployed.
"Customers are assured that the Toyota dealer network only uses genuine Toyota parts," the statement concluded.
New Toyota vehicles or cars that have never been involved in a collision are not at risk. Because this is a legal matter, no further comment will be made by the company at this point in time.