By 2014, Volkswagen has taken the U.S. auto market by storm with its fleet of affordable, fuel-efficient diesel cars. But a new study threatens to reveal the dirty truth behind so-called ""clean"" diesel. When the EPA comes knocking with questions, the company's very survival is at stake.

Be the first to know about Wondery’s newest podcasts, curated recommendations, and more! Sign up now at https://wondery.fm/wonderynewsletter

Listen to Business Wars on the Wondery App or wherever you get your podcasts. Experience all episodes ad-free and be the first to binge the newest season. Unlock exclusive early access by joining Wondery+ in the Wondery App or on Apple Podcasts. Start your free trial today by visiting wondery.com/links/business-wars/ now.

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.