This is a group proceeding (class action) brought on behalf of persons who acquired (by way of purchase, exchange or taking on a lease or on hire-purchase) certain diesel-powered Toyota vehicles during the period from 7 February 2016 to 7 February 2022.
It is alleged that Toyota Motor Corporation Australia Limited (Toyota) supplied vehicles in Australia possessing design elements, commonly known as ‘defeat devices’, which impacted parts of a vehicle’s emission control system. It is alleged that these ‘defeat devices’ caused a vehicle’s performance to be enhanced but caused it to emit higher levels of nitrogen oxide, which the plaintiff claims were contrary to Australian road vehicle standards and that Toyota breached the Australian Consumer Law by representing that the vehicles complied with legal requirements for road vehicles in Australia.
If you are, or you think that you may be a group member, you should read the documents below carefully. The definition of a "group member" is set out in the Notice.
The Notice (a copy of which is below) contains important information about your rights to:
(1) register your claim in the proceeding;
(2) opt out of the proceeding; or
(3) do nothing
In summary, if you fall within the definition of a group member, you have three options:
OPTION 1 - REGISTER
If you want to be eligible claim money from any settlement reached between the plaintiffs and the defendants to settle the class action, you must register your claim in accordance with the Notice.
To register, you must complete the online registration form with Maddens Lawyers.
For further information on how to register, please refer to Option 1 on page 5 of the Notice below.
OPTION 2 – OPT OUT
If you do not want your rights determined by the class action you must opt out by 4:00pm (AEST) on 16 July 2026.
To opt out, you must either:
- complete the online opt out form; or
- complete the opt out form found at Annexure C of the Notice and return via email or post to the address on the notice for the Registry of the Supreme Court of Victoria.
For further information about opting out, please refer to Option 2 on page 5 of the Notice below.
OPTION 3 – DO NOTHING
If you do nothing in response to the Notice, you will remain a Group Member. This means you will be bound by any settlement or judgment in the class action, and you will not be able to sue Toyota for the same (or possibly related) claims in any future case. If the case is successful, you will be entitled to share in the benefit of any compensation awarded by the Court, although you may have to satisfy certain conditions before your entitlement arises. You do not have to do anything to remain a Group Member.
For further information about this option please refer to Option 3 on page 6 of the Notice below.
Notice to Group Members - Registration and Opt Out
Orders of Watson J (17 February 2026) – Further Opt Out Extension
Orders of Watson J (30 January 2026) – Opt Out Extension
Orders of Watson J (12 December 2025) – Registration and Opt Out
Registration documents
Registration Form (online) for you to submit via Maddens Lawyers' website
Opt Out documents
Opt Out Form (online) for you to submit via the link; or
Opt Out Form (PDF) download, complete and submit by email or post to the Supreme Court of Victoria
Reply to Defence to Further Amended Statement of Claim filed on 29 May 2025
Defence to Further Amended Statement of Claim filed 15 May 2025
Further Amended Writ and Statement of Claim filed on 17 March 2025 in the Toyota Diesel Emissions Group Proceeding (Class Action)
Group Proceeding Summary Statement filed on 17 March 2025 in the Toyota Diesel Emissions Group Proceeding (Class Action)
Updated Funding Information Summary Statement filed on 18 November 2024 in the Toyota Diesel Emissions Group Proceeding (Class Action)
Orders of Watson J made on 1 November 2024 to substitute name of the Plaintiff in the Toyota Diesel Emissions Group Proceeding (Class Action)