Transport Canada is entirely different than the US safety regulators, it being a different country and all.

In 2006 and 2007, the model years the Transport Canada recall apparently applies to, BMW Canada sold approximately 50,000 vehicles. So if 15 thousand vehicles are potentially involved, you have a one in three chance of yours being in the affected serial number range or impacted population. If the 15 thousand vehicles were sold into both US and Canada, you have a much smaller chance of being impacted.

Also, the TC document suggests to me that it is an after-failure campaign, not a replacement of all of the sensors. They state that due to the risk of failure, the warranty has been extended to 10 years, and any failed sensors (resulting in an air bag warning light) will be replaced. If the failure mode resulted in no warning light, then that would be a reason to replace the sensors. If the light indicates a failure, then they wouldn't need to replace them all.

Let us know what BMW says.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue