"Volkswagen has given no indication that it is considering compensating vehicle owners for the losses they may suffer.
Barrister Nicole Smith was working with his firm on the group action, Mr Cox said, forming the same team that had achieved success with a group action for Tauranga business owners affected by the grounding of the container ship Rena on Astrolabe Reef four years ago.
Volkswagen has meanwhile updated its website to disclose that 5548 of its own vehicles in this country are affected by the emissions-cheating software, which it said can continue to be used without restrictions pending a technical solutions.
That is an increase from the company's previous estimate of 4639 vehicles, and includes 2222 Tiguan SUVs and 1433 Passat cars as well as varying numbers across six other models.
Audi has 1937 and Skoda has 1371 vehicles caught up in this country in the scandal, which Volkswagen says could affect up to 11 million vehicles worldwide.
Volkswagen NZ expects a recall to fix New Zealand-registered vehicles to take much of next year.
General manager Tom Ruddenklau said this afternoon that the company would not comment on the law firm's "solicitation", although he acknowledged that VW owners were free to seek help from wherever they wished.
"People have bought Volkwagens and they have been cheated on - they are aggrieved and disappointed and they want to know that someone cares about what's important to them," he told the Herald.
"I'd really like to think they can come to us and our dealers."
"However, if they want to get external advice and help from whoever that is - and if that helps - that's fine."
"But I'd like to think the way we operate as an independent distributor by being open and honest and upfront, that their best course of action is actually to come and have a chat to us."
Mr Ruddenklau would not comment on whether owners could ultimately expect any compensation.
"Until we know what the solution will be, I would be just speculating," he said.
"All I can say is VW globally is doing everything they can to avoid impacting the vehicles' driveability."
"Our priority is making sure we keep our customers updated and get this thing fixed."
He expected a remedy would be approved by a German federal agency to allow VW New Zealand to start "tearing into the physical recall side early next year."
The company was also trying to trace owners through the Transport Agency database of several hundred used diesel VWs that may have been imported with the offending software.
Gibson Sheat is meanwhile inviting owners of affected Volkswagen, Audi and Skoda vehicles to register their details for the group action at http://www.gibsonsheat.com/news-and-publications/latest-news/volkswagen-emissions-claims