Genuine BMW Base Support System (Roof Rack Kit). BMW's practical, modular roof rack system with coded bolts offers security. Made of high-tensile aluminum tubing, this support system is remarkably strong and corrosion-resistant. Required for roof transport system accessories. Pricing varies depending on which model is selected. *Please include vin when ordering. **Roof rack storage bag sold separately - add part # 82712289107 to cart to order.