Owners of Volkswagen, Audi, and Porsche diesels may soon be offered a fix for their cars via a software update.

At the moment, Volkswagen has no plans to buy back the roughly 85,000 affected cars with the larger 3.0-liter turbo-diesel V-6, unlike what it reportedly will do for vehicles with 2.0-liter turbo-diesel four-cylinders. Instead, states Automotive News, a software update will remedy the suspect ?auxiliary emission-control devices? that allow excessive emissions following a cold start. A new catalytic converter may also be installed. (See the full list of affected vehicles here.)

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Despite the Environmental Protection Agency citing VW with a second violation for these vehicles in November, just weeks after initially citing the company for 482,000 cars with 2.0-liter engines that allowed excessive emissions, VW has continually denied that there was a deliberate defect with the larger engines. The company said in November that “no software has been installed in the 3.0-liter V-6 diesel power units to alter emissions characteristics in a forbidden manner.” The EPA and VW have not reached a final agreement or agreed upon an exact fix for any of the half-million-plus cars under scrutiny.

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