I have a 2007 335i coupe. Great car. I have aftemarket wheels with Blizak winter tires. The tire pressure sensors are from Tire Rack as well. The winter tires have 2 seasons, about 10,000 miles on them. Lately the tire pressure light comes on, the red symbol as well as the yellow signal. Every time I check, with a gauge, the tires are right on spec. I try to check them once a week anyhow, just on general principle. I reset the lights, and all is well for a while. What do you suppose is causing this? Bob Elton
