Answers to questions about Volkswagen dirty diesel deal

People who own one of 482,000 Volkswagen vehicles with 2-liter diesel engines will be able to sell them back to the company or have them fixed under terms of a deal announced Thursday by a federal judge.

The owners also will get unspecified "substantial compensation" from the company, which has admitted to programming the cars to cheat on U.S. emissions tests.

Many of the details still have to be worked out between VW, the government and lawyers who are suing the German automaker.

[...] unclear is how much VW will pay to buy the cars back, although owners likely will get the cars' value before the scandal broke on Sept. 18, 2015.

Older vehicles will need more extensive work on the exhaust system and could even need a chemical system to treat nitrogen oxide that would have to have a storage tank.

VW also must set up a fund that would pay to make up for the excess pollution from the dirty diesels, and it will have to pay more to another fund to promote green auto technology.