Which German manufacturer has won Le Mans 13 times? Audi has won the 24 Hours of Le Mans 13 times.
Audi’s first overall victory came in 2000, when the Joest-run Audi R8 was driven by Tom Kristensen, Frank Biela and Emanuele Pirro. The marque quickly became the dominant force of the early 2000s, winning repeatedly with sophisticated prototype racing cars and highly efficient powertrains.
Audi’s 13 victories span 2000–2002, 2004–2008 and 2010–2014. Its record includes three different eras of technology: the petrol-powered R8, the diesel R10 TDI and R15/R18 prototypes. The 2006 R10 victory was especially notable because it made Audi the first manufacturer to win Le Mans overall with a diesel-powered car.
The main source of confusion is Porsche, which has more overall wins—19—but is also German. Mercedes-Benz and BMW have not matched Audi’s total. The question’s wording points specifically to Audi’s 13-win record.