Kevin Turen, famous for producing HBO shows like “Euphoria” and “The Idol,” died as a result of multiple heart issues … TMZ has learned.

The producer’s official cause of death is acute cardiac dysfunction and hypertrophic heart disease … according to the medical examiner, who also lists coronary artery disease as another significant factor.

As we first told you … Kevin suffered a medical emergency while driving his Tesla down a California freeway earlier this month, when his 10-year-old son was in the car.

Kevin’s family told us the son was able to navigate the car to the side of the road, calling 911. Kevin was rushed to a hospital, where he ultimately died.

Remember … we were told investigators quickly ruled out drugs and alcohol as a factor … and now we know it was a fatal heart issue.

Kevin was only 44 years old, and he’s been remembered in Hollywood as a family man who was more proud of his children than his work in showbiz.