Hard to say without seeing the contract. I know on an old BMW I had a third-party extended warranty through the dealer that had a provision similar to what Legion5 posted, meaning the warranty could be transfered. When I bought my M3 the dealer tried to sell me the BMW extended warranty and said it was transferable but I quickly declined and so have never seen the official documents related to the BMW warranty. Only way to tell is to see the contract.
In your case it is possible the car has the BMW extended maint. which does transfer but the extended warranty is a third party and the owner did not transfer it when he sold/traded the car back to the dealer, letting the 30 day window expire.
Current: 2011 Space Grey E90 M3, DCT, Comp. Pkg., Conv. Pkg., everything but Cold Weather Pkg!
Gone: 2008 550, Space Grey, Sports Package, Sport Auto Transmission.
Sold: 2004 545i (U.S.), Steptronic, Silver Gray.
Last edited by kscarrol; 10-29-2012 at 09:12 AM.