Originally Posted by Greatdane84
^ Sounds jealous. If a parts not there and you clear your codes, they can't say sh*t
While I don't know how true it is, I've read bmw can check to see how high your car has boosted by reading the dme. If they saw a level above stock, who knows what they'd say.
But, even if they can do this, I'd be surprised if it is something they do as part of a lease return.