Original warranty expired at 50,000 miles so I began taking my vehicle to a licensed mechanic to do scheduled maintenance. While driving over to the mechanic for a brake change I went to stop and lost usage of my brake. This resulted in me merely rearending the back end of the car in front of me. My mechanic replaced rotors and brake pads; and there was still a problem. So he began to look over my car and found that the vacuum boost pump for my bakes was possibly bad. Once opened in that area he found that the bolt holding the sprocket was broken. Part of the bolt was remaining and the rest is still missing somewhere in my engine. Towed my car because it is not drivable to BMW of riverside to have them look it over and fix the faulty bolt. They refused to fix it because it wants serviced there for one year due to the expired warranty. I called BMW of North America to file a claim to investigate it under a safety issue because BMW of riverside said it was a mechanical issue, but it is truly a safety issue. Susan monjelli from BMW of North America filed my claim and had a engineer look a my vehicle again. She is claiming because I took my car to another mechanic other than BMW that my mechanic must have broken the bolt and that it isn't because it was faulty. My mechanic has never touched this item. He states that the sprockets and the chain are lodged and the only way that this could have happened is when the car is running, not buy him working on it in any way. Also there is a website saying that there is a problem with this particular part in old and new BMW vehicles.

- Phelan, CA, USA