This is to help you understand which Mini or Mini Cooper you own from a spare parts point of view. Officially there was only Mk2, Mini or Mini Cooper.  The first Mini was just the first, it was not given a Mk designation.  The rest of the Marques have been adapted by enthusiasts.  The Mk4 Mini Cooper was named by Keith Dodd of Minispares in 1976 to help people understand the main parts changes. From here we eventually got to MK7

What Mini Cooper do you own-Make your Mark from this list
Confused what mini you own, use the following Mini spares guide.

Mk1 is the original from 1959-1967 which had a smaller rear window,
small round rear lamps, external door hinges, no bonnet moulding but a moustache
shape grille moulding. Indicator stalk had green lens on end

Mk2 introduced in October 1967 it had a new grille with upper moulding attached to the bonnet except van and pickups. Larger square rear lamps and larger rear window. Indicator stalk loses the green lens and becomes multiple use with horn, indicators and headlamp dip/flash.

Mk3 introduced in November 1969 had wind up windows with internal door hinges except van and pickups. The boot lid lost the original hinged number plate and its recess shape and a large rear color coded lamp was fitted in its place. Larger rear side windows.

Mk4 introduced in 1976 had a front rubber mounted subframe with single tower bolts and the rear frame had some larger bushes introduced. Twin stalk indicators were introduced with larger foot pedals. From 1977 on the rear indicator lamps had the reverse lights incorporated in them.

Mk5
All cars had 8.4 inch brake discs and plastic wheel arches but retained the same Mk4
body shell shape.

Mk6 is 1990 on when where engine mounting points were moved forward to take 1275cc power units, and includes the HIF carb version and plus the single point fuel injected car which came out in 1991. The 998cc power units were discontinued. Bonnet release fitted from 1992.

Mk7 is the final twin point injection with front mounted radiator