51 47 490 Removing and installing/replacing front underbody protection

Release screws (2) and pull out underbody protection (1) from under bumper trim (3).

Installation: 

1. Ensure that seals are correctly seated.
2. Center underbody protection (1) and tighten down screws (2).
   Fig 1: Releasing Screws (2) And Pulling Out Underbody Protection (1)

   Courtesy of BMW OF NORTH AMERICA, INC.