can someone help me for BMW 318d 2008, -4B1C -452A i never saw codes like those 2

Question

I have bought an accidented car, not the first time.
The moment i started to fix the car , cause would like to keep it for myself. i have changed the steer airbag , i had it on my obd computer  and already erased 54 problems. but i have stil this 4B1C and 452A. Never seen those before.
i hope someone could help me.

car information:

bmw 318d
08/2008
143hp