According to a new report from Forbes , the Department of Justice is demanding Apple, Amazon, and Google hand over “identities, addresses, and purchase histories” of more than 100,000 users of a “car tinkering app” called EZ Lynk.

The report explains that EZ Lynk , based in the Cayman Islands, is embroiled in a DOJ case over alleged Clean Air Act Violations:

The DOJ first sued EZ Lynk in 2021, accusing the company of breaking the Clean Air Act by selling “defeat devices,” which are designed to remove emissions controls on a vehicle. EZ Lynk denies its primary purpose is to help drivers circumvent emissions laws, as its apps can be used for other tweaks and software upgrades, as well as to monitor a car’s performance.

The DOJ sent subpoenas to Apple and Google in March and April, according to a joint letter seen by Forbes .

In the letter, EZ Lynk’s lawyers say Apple and Google plan to challenge the request.

“These requests for potentially hundreds of thousands of people’s PII go well beyond the needs of…