bmw

and can swap coils to another cylinder and see if the mis fire goes with it , check injectors for proper firing , try some fuel additive for them the might be dirty , check plugs and wires if worn replace them

Go through each of these test one by one... first, swap the cylinder 1 and 2 ignition coils. If the misfire moved, it's the coil. If it's the same, then do the same with the spark plug. Didn't move, then with the fuel injector. Being a single cylinder misfire, it's likely one of those three things.