The starter motor in my '91 G13BA carby leafy Sierra was starting to play up so I ordered a replacement. Gave him the details and it arrived that arvo, sweet. Just pulled mine out and it's different even though the listing for it is correct.
A quick scan of ebay I found the one that is practically the same but it's to suit Vitara.. Lucky I have one here and is only a few month old

But was there a change over or something?
Left is Vitara (g16b), Middle Sierra, Right replacement for Sierra.

