I had something similar in my 06 330Ci 95k miles. Very, very minor shudder under light braking. My front brakes were below min thickness, so I did that DIY. Felt better after that.
Plus it was time for new tires. They were almost slicks due to some track days I did this summer. And you could see significant feathering of the tread on the outside left tires. I also did an alignment because it was pulling noticeably to the right. Although that could be mostly due to the very uneven tire wear. Now I have no shudder.
Try stepping through a few items, checking them off as you go before spending any money:
- pad thickness
- feel the rotors ( should be pretty smooth)
- tire condition
- check the torque on lugs and brake parts
- look for loose or worn suspension components and bushings.
Sent from my Evo using Bimmer App