From 2007 to 2013 TAG Heuer backed the Peugeot squad until 2009 and then the AudiSport team through to the end of 2013. Here are a few shots of the cars. 2007- 2009 Peugeot 908 HDi FAP 2007 2008 2009 2010- 2013 Audi 2010 2011 2012
http://automotiverhythms.com/tag-heuer-and-audi-sport-victorious-at-the-24-hours-of-le-mans/ There are is also recently sponsoring of Patrick Dempsey, albeit not in LM class.
Real shame that Nissan pulled the pin on this so quick. given how radical the concept was, it would have been incredible if the car was quick out of the box...would have thought a couple of years of development was needed.