NHTSA Complaint #11516731 — 2011 BMW X3

The bolts backed out of my camshaft (VANOS) adjustment units. The related "warranty (not a recall)" information is found here: https://static.nhtsa.gov/odi/tsbs/2018/MC-10135011-9999.pdf. I purchased a 2011 X3 28i last May (2022) with ~110k miles, and there was no open recall information attached to the vehicle. Inspecting prior service records the VANOS bolts were never replaced. After a few thousand miles the bolts backed out and sheared. BMW NA said it was out of warranty and would not be covered. There was no information found when searching the VIN for necessary repairs. I've seen 10+ reports in online forums in the past two years explaining they needed or got the repair and BMW NA told them it would not be covered. I don't understand how I was to know, or even the past owner (2nd owner, I'm the third), that this engine part failure would or could occur. If the "warranty (not a recall)" was recalled on other models it seems nefarious that a warning wouldn't be attached to the vehicles. The vehicle was inspected and passed, and then inspected by a indie BMW technician who used to work for BMW as well. The vehicle had repairs done, but even he did not suspect any engine issues. This issue is a matter of when and not if with the vehicles within the "warranty" time span. My request would be that BMW reopen the warranty or rightfully claim it a recall as it should have been in the beginning. I would appreciate any guidance on the matter. Thank you.