M106 also "M30B34MAE"
 

I would like more info on this thinking of buying a 84 745i an would like to know if its carb or fuel injection an how hard parts are to find for it

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7 is the series; 45 the engine size (4.5ltr); the 'i' stands for 'injected' or 'injection' and the L (if applicable) indicates Long wheelsbase (extra 4" in rear doors). Parts are easy although some are expensive compared with domestic products. OEM is very high quality though.

actually its a 3.5 turbo calling it a 45

m102 motor to be exact

bottom end of a bmw m1 7.5:1 compression ready for 15 to 18 pounds of boost

comes with a kkk turbo

it is fuel injected L-jetronic if im not mistaken

i have a couple of these motors

one with a modified turbonetics turbo 20 psi spools at 2200rpm

most of em come auto

pm me for more info on these motors

parts most will fit from m30 motors

but theres some parts that wont

Sorry about the mis-info on engine size.