The release of the 2018 LCI introduced some minor improvements to the M4/4-Series Coupe and Convertible. On the exterior side, the most noticeable change was the taillights. For those looking to update the rear of their 2014+ 4-series or 2015+ M4 to appear like the brand new 2018 models, the LCI Upgrade includes inner & outer tail lamps (4 total) and plug & play harnesses for a 100% bolt-in install.