Following occasional drives with the family car on the Nordschleife, all three Schmitz sisters started racing, but only Sabine continued and collected victories. Schmitz won in CHC and VLN race events, the VLN endurance racing championship in 1998. After getting married and running a hotel in Pulheim near Cologne, she won the 24 Hours Nürburgring in 1996 and 1997 as "Sabine Reck", all with a BMW M3 Group N entered and co-driven by local veteran Johannes Scheid. In 2006 Schmitz and Klaus Abbelen drove the #97 Porsche 997 in the Nürburgring VLN endurance racing series, entered by "Land Motorsport". They finished third in the 24h 2008.