That list needs to be updated. Try
And to answer the question, no there really doesn't seem to be much logic
behind the development numbers
While your Z3 shares the E36 designation with the 3 series on which it was
based, the '03~'09 Z4 is not called an E46, it is an E85!
It seems like the E numbers seem to make about as much sense as BMW
displacement labels - the current 328i displaces a full 3 liters, but my E46
328i has a 2.8 liter motor! And the E46 323i was a 2.5 liter, IIRC. And
the current 135i, 335i, and 535i are also three liters, but turbocharged!
So a rose by any other name....
The most important part of the E number is that you know what yours is. If
you are shopping online for accessories or options, and the item fits an
Enn, you need to know which one you have so you can determine that the item
fits your car.
You can't buy floormats for a 325i, for example, because the 325i is
available in several different E numbers, you have to buy the floormats that
go to you E number, whether they fit the 325i, or any of the other cars in
You might decide to visit eBay for rims, you need to know the E number so
that the rim selection you are considering actually fits your car, even if
the rims are not the same size as the ones you are taking off.
There are other reasons to know your E number ...
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