Add one more of us to the list. The loud popping in my baby Bimmer started in the first year. It happens when I first start to cold/heat the car up during extreme temperatures, and with the chassis flex over bumpers and in hard cornering.
The service advisor at the dealership said he'd seen this in the six a few years back and told me that a re-torque of the strut bolts would fix it. It was popping again as soon as I drove it off the lot.
I haven't tried the insulation on the A pillar yet. I know someone that tried adding insulation to the dash with no luck, but not sure where the insulation was actually placed.
Honestly, I'm less concerned about the popping noise, and more that something else is being stressed and one day I will find a huge crack somewhere!
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