Where would you stand with ACL, if the Holden dealer you bought your car from has closed down? Hypothetical question from me, but there may be some in this situation.
In a simple sence,
@VS 5.0 and
@vc commodore are correct.
According to ACCC, the manufacturer still has liability related to the goods being of acceptable quality (and provision of spare parts). As such they still must fix any 'quality' related issues you have. Since no spanner twirling would be done at HHQ in port melbourne, i'd say their dealer network would be involved in any fix. So you'd be covered by ACL if a dealer went belly up.
What stays with the seller is your rights to choose the remedy (such as a full refund) when the product has a major failure under AC. It seems a manufacture isn't explicitly defined as having to provide a remdey of the owners choosing (like a full refund) under ACL. So if a dealer went belly up you may loose some leverage that the ACL provides. However, a purchaser can still recover "damages" from the manufacturer so it may in principle be similar a outcome.
At the end of the day no manufacturer would like to see bad press associated with the quality of their product so they would likely play ball and try to avoid public legal stouches so you may still get the remedy you want. But, in days gone by, the dealers and/or manufacturers would sometimes have owner sign a Non Disclosure Agreement when big problems occured as a condition to remedy the issue but now ACCC's view is that they can't condition a remedy on the owner signing a NDA - so no needs to sign such NDA's any more