I was aware that the Twin Turbo on 535's is a common issue before I decided to buy one. After a few weeks driving the 535i on my way to Vegas, half the way through- having 300 more miles to drive the Engine Malfunction light came on messaging Reduced Power- It was not a surprise- I am used to lights coming on right after purchase.
25 miles after I received the warning I decided to stop and do researches-
When the light came on, I did not notice any power loss more of a less responsive acceleration and was able to make it to Vegas and back home the 560 miles. After making the stop at the gas station I shut the car down and restarted back, the warning light did not appear but it came back on after driving 200 miles. And again I experienced no loss of power. I first thought that it should be related to the Fuel pump and I also put fuel injector cleaner in the gas tank. Than I thought the car perhaps was fixed and after the warnings are canceled they usually can come back on after a while and it needs a software reset. The light appeared a couple more times but not for the last 300 miles I drove coming back home. I am lucky there was no issues and the car resisted so long. I am glad I did not have to stay in the middle of the desert in the heat of 115 degrees. There are a few factors that might caused the light to come on; Vanos Solenoid, HPFP & injectors, the turbos or just a software error. I am taking the car in to a mechanic this weekend and I will keep you updated.
And because every adventure in my life has a happy ending, we had a great time in Vegas celebrating my mom's Birthday-