1. Volkswagen Dieselgate Scandal: The ongoing controversy surrounding Volkswagen’s manipulation of emissions tests in 2015 has continued to make headlines, with lawsuits, fines, and criticism directed at the company.

2. Tesla Autopilot Accidents: Various accidents involving Tesla vehicles with the autopilot feature engaged have sparked debates on the safety and reliability of autonomous driving technologies.

3. Nissan-Renault-Mitsubishi Alliance Leadership Crisis: The arrest and subsequent legal battles of former Nissan chairman Carlos Ghosn led to a major leadership crisis within the alliance, resulting in strained relationships between the companies.

4. General Motors-UAW Strike: In the United States, the United Auto Workers (UAW) union launched a major strike against General Motors, resulting in production stoppages and significant financial losses.

5. Ford’s Defective Transmission: Several lawsuits were filed against Ford Motor Company over alleged defects in their transmissions, particularly the dual-clutch PowerShift transmission, which led to a major controversy and a class-action settlement.

6. Electric Vehicle Battery Fires: Incidents of electric vehicle battery fires, mainly involving Tesla cars, have raised concerns regarding the safety of high-voltage battery packs and the lack of standardized protocols for extinguishing such fires.

7. Waymo vs. Uber: Waymo (Google’s self-driving car division) filed a lawsuit against Uber, accusing them of stealing trade secrets related to autonomous driving technology, resulting in a highly publicized legal battle.

8. Takata Airbag Recall: The ongoing recall of faulty Takata airbags, which can explode and shoot shrapnel when deployed, continued to be a major controversy, affecting multiple automakers worldwide.

9. Uber and Lyft’s Gig Economy Classification: The classification of Uber and Lyft drivers as independent contractors rather than employees sparked debates over workers’ rights and the responsibility of companies towards their drivers.

10. Rivian’s Lawsuit Against Tesla: Electric vehicle startup Rivian accused Tesla of stealing trade secrets and poaching employees, leading to a legal dispute that shed light on the competitive challenges in the burgeoning EV industry.

Note: This list is subjective and based on major controversies reported in the year mentioned. There may be other significant controversies that have not been included.