BMW E39 M5 with a VW W10 Motor BMW E39 M5 test mule with a VW W10 motor " data-image-caption="" data-medium-file="https://i0.wp.com/engineswapdepot.com/wp-content/uploads/2025/04/BMW-E39-M5-with-a-VW-W10-motor-04.jpg?fit=600%2C338...