KYOSTAR Transmission Underbody Shield Skid Plate for BMW G20 3-Series G22 4-Series Upgrade the underbody protection of your compatible BMW with the KYOSTAR Transmission Underbody Shield. Designed for listed BMW G20 3-Series and G22 4-Series applications, this vehicle-specific protective panel provides an additional physical barrier around the transmission and central underbody area. The shield features a large one-piece panel design shaped around the compatible BMW underbody