If you’re experiencing the classic dashboard lit up like a Christmas tree scenario in your E90 3-series BMW, you are probably thinking that something horribly catastrophic just happened to your car. But don’t worry, yet. Recently my 2007 335i broke down on the highway on the way home from my mother-in-law’s birthday celebration. I was with my wife and daughter and it was just getting dark out. It was also the hottest and most humid day of the year so far with temps around 90 degrees. This was the worst possible time to experience a break down! The car was cruising along for 15 minutes on the journey home, without any hint of a problem. All of a sudden, every warning light in the car came on and it began slowing down. The speedometer dropped to zero, even though we were going 65 MPH. The transmission shifting felt clunky, too. The coolant, ABS, airbag, DSC dynamic stability control, brake, service engine soon, yellow gear of death, and others, came on and cycled through like a …