List of N54 Z4 roadsters with oil cooler
All Z4 35i and 35is seem to have it, but it is different from the one in the 3-series
http://www.realoem.com/bmw/partxref....=on&series=E89
The 3-series oil cooler (shared between S65, N54 and N55 engines)
I cannot spot any LCI or pre-LCI that does not have it.
http://www.realoem.com/bmw/partxref....r=on&details=1
List of cars with the N54 additional left radiator (not oil)
Only 335is and 1-series M coupe. (And BMW PPK stage 2 equipped cars)
http://www.realoem.com/bmw/partxref....=on&showeur=on
List of cars with the 850W fan
Only 1-series M coupe, 335is, 335d (USA only) and M3 (different part number: 17112283621)
http://www.realoem.com/bmw/partxref....r=on&details=1
(Fun fact: The M5/M6 uses a 1kW fan)
List of cars with the 600W fan
All turbo charged Z4s (20i, 28i, 35i and 35is) and many many other BMWs including the M135i
http://www.realoem.com/bmw/partxref....r=on&details=1
Separate DCT Transmission oil cooler
Only M-cars (others use regular heat exchangers)
PS realoem does not seem to know the 135is at all