One problem related to engine clicking and tapping noises has been reported for the 2011 BMW M3. The most recently reported issues are listed below.
I was driving on the freeway accelerating when I hit approximately 75 mph my car was making a loud revving sound and metal clanking sound in middle and smoke was coming from the front and back of the vehicle very thick white smoke all of a sudden my car slowed down and all the lights were blinking on the dash almost got into accidents while cars avoid hitting! my car wasn't going over 5 10 mph there was so much smoke was getting worried,some how I managed to exit the freeway and parked I was told my english was blown! maintenance was up-to-date only drove it on the weekends only had 52,000 miles nightmare 2011 BMW M3.