The KDV 4 first appeared in the year-old Class B of the German F3 Championship in 1989, entries had been made in 1988 but the car did not appear. It was VW powered and in its two 1989 races it qualified and finished at the back, it appeared a few more times in 1990 but either failed to qualify or failed to start.
   
Drivers:  
   
1989 Jaroslav Vorel.
   
1990 Jaroslav Vorel.