i received a survey in the mail from toyota saying they wanted to do emission testing on my car at the toyota engineering center in ann arbor, mi. has anyone received a similar letter or heard about this caflor. i googled caflor and looks and sounds legitimate but its daunting to leave your car off for 5 days in a strangers hands. from what i read caflor does OBD equipment for multiple car companies and i'm assuming toyota is making sure the products are working as expected.