You can find this product under BMW 4 Series LED Reverse Lights (40-013).
*Note: When you receive this product, you may see SKU: 40-015. It is the same product that the one you received.*
Step 1: Remove the trunk liner and trunk trim so you can expose the taillight housing.
Step 2: Unplug the stock harness and remove the taillight housing.
Step 3: Remove the piece that has the stock reverse light bulb. Be sure to pull out the correct bulb. We are pulling out the rounder shaped bulb. When you receive the LED backup lights, make sure you match the base with the base on the stock reverse light bulb.
Step 4: Plug in the LED reverse light bulb. You may notice that there is a groove on one end of the LED bulb. This ensures that the LED reverse light bulb can only be plugged in one way, so if you cannot plug in the LED bulb, you can flip it around so the grooves will attach accordingly. Make sure everything lights up and put the housing back in place. Reconnect the stock harness and put the trunk liner back.