Mark has hit my exact issue right on the head, can they be mixed. The used
injectors I purchased and had rebuilt were yellow.  The ones that came out
of my '90 2.1L were blue and appear to be original.  But since one of the
rebuilds failed (is back at the rebuild shop now for evaluation/fix) and I
haven't loked to see what was put in by the shop that did the fix, I may
have a mix at this time.
BTW, the Bosch website calls out the same part number as all our online
vendors show and the picture shown on the vendors pages shows green (good
picture on van-cafe.com )

On 5/20/06, mark drillock <drillock@earthlink.net> wrote:
>
>   I am nervous about partial replacement with a different color but the
> full
> sets seem ok. I would like to know if they are similar enough to run
> mixed with yellow, if anyone has this info.
>
>