I took my 2007 750i BMW to service because I needed to go to Orlando with my kids. Since the odometer turned 100miles it was time for service. The car was apparently with some electric problem, I thought at the time, because two windows, hot air and automatic AC stopped working at the same time. Therefore, I asked them to check those items for me. They said they would need to charge me almost USD 200 to make the diagnoses!!! So I got only the revision.
After two days and USD 1,400 the car was ready for pick up and I headed Orlando in the next morning after pick up. Two hours on the Turnpike and the car suddenly stopped working. It was scaring because I was going with the flow in a high speed and the car stopped responding, no accelerator, nothing despite being on. I was a nightmare to arrive back home and our Orlando trip didn't happened at the end!
The dealer Vista said this event had nothing with the revision of the car. I didn't bought but accepted to pay the USD 200 to get a diagnostic for the new problem and the old ones. Anyway I told them again that I was convinced we had a electric problem, that it wasn't a mechanic issue.
They called after a day saying that they couldn't identify what was happening because the computer showed to many events at the same time and that they would "try" to fix it, no warranties, for more USD 4,400!!! I got really disappointed and mad. I didn't accept the value and went to pick up my car. I parked it in a garage and rented another car.
I found a BMW specialist in the Internet and wrote all this history to him and send to him the car computer records. It was very easy to see that, and it was the first thing I noticed and said to Vista service when I arrived at the dealer, the Voltage going out of the battery was correct, but the Voltage arriving in the models was lower. The BMW specialist asked me to buy and change the module that regulates the Voltage. It cost me USD 100 and 5 minutes to change it in the car!! Everything was "magically" working properly again, including windows, AC and hot air!!!!
Vista specialist told me that my car wasn't working because: "Hey! What do you expect of a 100 miles car?" I replied:"So, you're saying to me that BMW last only 100 miles?" He answered: "Yes, this is why it is smarter to lease cars instead of buying them!" And I was called "not smart"!
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