The Volkswagen Group submitted its plan to fix its diesel emissions cheating 3.0-liter V6 engine to the California Air Resources Board and Environmental Protection Agency earlier in the week.

The submission of the automaker’s plan comes after four months of talks and negotiations with local U.S. authorities and comes despite Volkswagen, Porsche and Audi initially denying that the 3.0-liter V6 was installed with the same cheat device as the smaller 2.0-liter diesel engine.

Cars affected in the U.S. with the faulty 3.0-liter engine are the 2009-2016 VW Touareg, 2013-2016 Porsche Cayenne, Audi A7, 2014-2016 Audi A6, Audi A8, Audi A8L, Audi Q5 and 2009-2016 Audi Q7 models.

On Tuesday, Audi of American spokesman Mark Clothier said “We are fully cooperating with the U.S. authorities to make our V6 3.0L (diesel) engine compliant with regulations. After meetings between EPA and (California) and our technicians, we filed a recall plan.”

Before recalls can commence, the proposed fix has to be approved by federal regulators who just last month, rejected the automaker’s planned resolution for the 2.0-liter cars embroiled in the scandal.

While the company’s fixes in the U.S. haven’t been approved, it was awarded approval to recall 8.5 million vehicles in Europe last week.

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