BMW Repair Questions? Ask a Mechanic for Answers ASAP
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Those are cylinder missfire codes for cylinder 1 and 2. It can be as simple as a faulty ignition coil or a burnt cable from the coil to the plug. You can swap out those coils to another cylinder and clear the codes to see which codes return. You may want to swap them to the other bank as continued misfiring can cause cat converter damage.
Cylinders 1 ... 4 are on the right-hand side of the car as seen looking forward from the drivers seat (beginning with cylinder no. 1 at the front end).This is referred to as Bank 1 .Cylinders 1 > 4 front to back.Cylinders 5 ... 8 are on the left-hand side of the car as seen looking forward from the drivers seat (beginning with cylinder no. 7 at the front end). This is referred to as Bank 2 .Cylinders 5 > 8 front to back.