About 4000 Tasmanian vehicles remain fitted with faulty Takata airbags not included in the existing compulsory airbag recall.
In December last year, the Australian Competition and Consumer Commission flagged a new potentially lethal Takata airbag believed to be in 78,000 vehicles.
The airbags, filled with NADI 5-AT propellant, were fitted in vehicles sold in Australia which were manufactured by Audi, BMW, Ford, Honda, Mazda, Mitsubishi, Suzuki and Toyota between 1996 and 2000.
All eight companies have started a voluntary recall of affected vehicles.
The RACT has urged motorists to check if their vehicle is affected.
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RACT general manager mobility services Darren Moody said about 4000 of these vehicles remain registered in Tasmania.
"While many of these vehicles may no longer be in use, with Tasmania having the oldest vehicle fleet in Australia at an average of 12.8 years, it is likely that a large number of the state's motorists are at risk," Mr Moody said.
"These airbags may misdeploy in a crash, which may cause metal fragments to propel out of the airbag at high speed, or they may underinflate.
"Either way, vehicle occupants would be at risk."
The RACT said it was aware of three incidents involving suspected misdeployment of these airbags in Australia, resulting in serious injuries and a fatality.
Motorists can check if their vehicle is affected by visiting www.productsafety.gov.au/recalls/recall-of-takata-nadi-5-at-airbags.
Mr Moody also reminded motorists more than 6000 faulty airbags still required urgent replacement under the compulsory Takata recall program.
He said it was critically important to distinguish between the two recalls and for motorists to double check their vehicle was safe.
More than 85,000 faulty airbags in Tasmania have been replaced under the compulsory recall.
For more information visit www.productsafety.gov.au/recalls/compulsory-takata-airbag-recall.