I had a simmilar issue with a stock 335i when I put new tires on. Aligned correctly (according to NTB), but steering wheel was slightly crooked. It turns out the shop did a poor job, and their specs were to wide. I had it re-done twice then finally went to the dealership and problem was solved.
2010 e92 335i / Space Grey / Coral Red / Sport / AE V2 exhaust / oem black kidney grilles / black lower grilles / m3 spoiler / MTECH steering wheel / oem stainless steel pedals / oem MTECH ebrake / split arm rest / Michelin Pilot SS / gloss black badging /