Originally Posted by FordCustomerService
The Customer Satisfaction Program 12B37 is VIN specific. If you haven't received a letter, then it won't apply to your car.
There are a certain number of VINs that will not receive a letter, but DO require the update. My Focus was one of them, and there were at least a few others on the forum in the same situation.
You can check http://www.etis.ford.com/
and/or visit your dealer and have them enter your VIN into their system to see if you need the update.