The LED lamps are subject to electrical polarity.
Unplug the LED and put it in 180 degrees from where it was.
Sounds really silly, but it was a problem I noticed.
2017 GT. Re-skinned the seats, painted hood vents black, JLT oil catch can, and all before I took delivery.
2009 v6 vert. My first mod - Sequential Taillights Kit! Ha ha.
Other minor items, X3/XF3 Tuner w/custom tune, GT Dual Exhaust Take-offs, FR 8.8” 3.73, JLT Oil Separator, rear sway bar, strut tower brace.