Front Door Weatherstrip, Outer Right - E30 3-Series Sedan

This part is listed by BMW as BMW part number 51211913058 (51-21-1-913-058) and is described as Genuine BMW Front Door Weatherstrip/Seal, Outer Right, for E30 4-door sedan and wagon (1984-1991).

This is a Genuine BMW weatherstrip with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.