I had OEM LED tail lamps for over 5 years installed by me with resistors(not EE) on my 2000 323Ci. I had to do this before any aftermarket LEDs were ever made. I was one of the first in the USA to do this back in the day. Search the Lighting Forum for the thread made by Wendant, he pioneer the way.
OE CSL WHEELS - OE CSL BRAKES - OE AUTOFLD MIRRORS - CSL TRUNK - CSL DIFFUSER - AA TUNE - AA PULLEYS - AS 40% SSK - BILSTEIN PSS9s
CF CSL LIP - NAVI - BMWPERF CF STRUT BAR - BMW GROUP N MNTS - GRUPPE M CF INTAKE - SUPERSPRINT - UUC BRKLINES, TRANS, RTABs - H&R SWAYS - 4.10 M-SPORT DIFF