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 AUTOFOLD MIRRORS - CSL TRUNK - CSL DIFFUSER - AA SPORT TUNE - AA PULLEYS - BILSTEIN PSS9s - AS 40% SSK
CF CSL RACE LIP - NAVI - BMW PERF CF STRUT BAR - BMW GROUP N MNTS - GRUPPE M CF INTAKE - UUC SS BRAKELINES, TRANS MNTS, RTABs - 4.10 BMW M-SPORT DIFF