The dynamic flashing module is a cheap alternative here. It works with split turn signal on the tailgate.Here's a little trick to use. The module controls the outer turn signal slightly time-delayed, whereby the special effect comes about. All features at a glance. Plug & Play installation (with instructions).
BMW F30 3s 2014.9-2017.9. 2 x Blikermodule for left and right tail light. The item "2X Dynamic Turn Signal Indicator LED Taillight module For BMW F30 3s F80 M3 LCI" is in sale since Wednesday, February 27, 2019.This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Lighting & Lamps\Light Bulbs\LED Lights". The seller is "easylife_go" and is located in Shanghai. This item can be shipped worldwide.