I've had great success touching up my gloss black trim with duplicolor ds100 "universal black" . I removed or masked most of it and wet sanded and sprayed the pieces and they match perfectly.

If you are going to replace, probably worth a shot.

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BMWCCA Chapter President, Hawaii Chapter (fmr)
03' X5 4.4i, 02' MCoupe, 99' MCoupe (sold), 88' M3, 01' E39 M5