Australia's consumer watchdog says more cars fitted with defective and potentially deadly airbags are set to be recalled after another million were added to the list.

Key points: 1 million more cars were added to the list of cars with defective airbags

1 million more cars were added to the list of cars with defective airbags The ACCC added more cars to a "future recall list" with more models to be announced

The ACCC added more cars to a "future recall list" with more models to be announced Roughly 25,000 of the most-dangerous older "alpha bags" are still on the road, ACCC says

The latest list, announced by the Australian Competition Consumer Commission, brings the total number of cars recalled nationally to 4 million.

Is your car on the list?

The ACCC added the Audi A5, Mercedes-Benz C-Class, Skoda Octavia, Ford Mondeo, Volkswagen Golf, Holden Cruze and Toyota Yaris, among other models, to a new "future recall" list.

Deaths linked to Takata airbags 2009: One death in the US

2009: One death in the US 2013: One death in the US

2013: One death in the US 2014: One death in Malaysia, two in the US

2014: One death in Malaysia, two in the US 2015: Four deaths in the US

2015: Four deaths in the US 2016: Three deaths in the US, four in Malaysia

2016: Three deaths in the US, four in Malaysia 2017: One death in Australia Sources: AP archives, Center for Auto Safety, National Highway Traffic Safety Administration, Honda Motor Co., legal documents and police reports

But more makes and models will be announced.

"We know there will be a few further recalls in the coming month which we are just in the process of negotiating," ACCC deputy chair Delia Rickard said.

"So when people visit productsafety.gov.au they should sign up for the free recall notifications and that way they will see whether their vehicle is added to the list."

The ACCC has also revealed about 25,000 of the most-dangerous older Takata airbags known as "alpha bags" are still on the road.

"The alpha airbags really are incredibly worrying, there was a fault in the manufacturing of some airbags in the early 2000s and there is a much greater chance that they will deploy and harm or kill people than the other airbags," Ms Rickards said.

"If you have an alpha bag what you need to do is stop driving it immediately, contact your manufacturer or dealer, arrange for them to come and tow it away, do not drive that bag."

The airbags' inflators contain a defective gas and have the potential to explode and spray metal shrapnel into drivers and passengers.

To date, Takata airbags have been responsible for more than 230 injuries and at least 23 deaths worldwide, including one fatality in Australia.

"Please don't be complacent," Ms Rickards said.

"This is a really serious recall, take it seriously, commit right now to check the website and take action this week."

The global Takata recall is the biggest recall in automotive history and has affected more than 100 million cars worldwide.

The list of cars affected is here.