The BMW V12 LMR was a Le Mans Prototype built for sports car racing from 1999 to 2000. The car was built through an alliance between BMW Motorsport and WilliamsF1, and was the successor to the failed BMW V12 LM of 1998. It is famous for being BMW's only overall victor of the 24 Hours of Le Mans.

Immediately following the 1998 24 Hours of Le Mans in which both BMW V12 LMs had failed to finish due to mechanical difficulties and a slow pace caused by aerodynamic inefficiencies, BMW Motorsport made the decision to radically revamp their sportscar project and quickly replace the V12 LM with a new car for 1999, the V12 LMR.

The V12 LMR would retain only the basic structures of the V12 LM, while all of the car's bodywork was redone from scratch. The cooling ducts, a major problem on the V12 LM, were moved to the top of the car instead of from the bottom where it had suffered from ambient track heat. Among the more radical design features was the use of a small rollhoop located only behind the driver's seat, instead of a wide rollhoop which covered the entire cockpit. This was done through using a loophole in the ACO's Le Mans prototype regulations. This allowed for less drag as well as less obstruction for the air to the rear wing. A total of four new chassis were built by WilliamsF1 in the United Kingdom.

Hans-Joachim Stuck (born 1 January 1951 in Garmisch-Partenkirchen), nicknamed "Strietzel", is a German racing driver who has competed in Formula One and many other categories. He is the son of the legendary Hans Stuck. As a young boy, his father taught him driving on the Nürburgring. In 1969 he started his first ever motor race at the Nordschleife. Speaking about that day he said, "Getting to the grid was extremely exciting. All of a sudden, my wishes to become a racer came true. I just wanted to start the race and give everybody hell!" Remarkably, the following year, at just 19 years of age, he won his first 24 hours race at the wheel of a BMW 2002TI. He won there again in 1998 and 2004, too, each time with a BMW touring car.

The always friendly and funny, tall and blond Bavarian, who is living in Austria, was immediately after his birth nicknamed Strietzel by his grandmother, as she claimed that the newborn baby looked like one of the famous Stollen cakes of her Saxony area. He is also nicknamed "Regenmeister" ("Rainmaster") for his ability to race on wet tracks.