If you look at the same illustration for 1984 I think your question will
be resolved.

Mark

John Rodgers wrote:
> Mystery part! For 91 Carat.
>
>  From ETKA-7 --- Model VA, Year - 1991, MG 9, SG 45 Illustration
> 142-00
>
> Two switches on the brake master cylinder are shown. # 17 and #18.
>
> Number 17 shows as "Part Number Unknown".
>
> Can anyone tell me if that is a real part, ie, is it one that is
> required, and can it be aquired somewhere - or is it in reality the same
> as # 18???
>
> Thanks,
>
> John
>