Engine Code Help Please

[bimmer247]

hi everyone i brought my first bmw 318 e46 2003 saloon today while driving home the engine siezed

i love the car so went on the hunt for an engine and

not sure what to do

cause i have discovered there is a 318 e46 M 42 engine and also an N 42

i think i have worked out mine is a N42 but can i use the M42 engine as they seem a bit cheaper

or are they totally different hope somone can help here cheers

[Guest DazH]

Stick with the N** engine due to the ECU - Would like some info on WHY your engine seized

[bimmer247]

ok but we are talking about a £500 difference in price if i can use the m42 can anyone please tell me what i would have to change if anything cheers i can buy a m42 for like £350 with low miles or a high mile n42 for £1100