One problem related to brake antilock wheel speed sensor has been reported for the 2009 Toyota Corolla. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Toyota Corolla based on all problems reported for the 2009 Corolla.
Several times while driving my car one day the abs kicked every time I would apply the brakes. There was no snow or rain on the road. It felt as if I wasn't going to stop, which is very scary with a 4 month old baby and 4 year old in the car! I took it into the shop right away. The shop looked at it and immediately called Toyota to see if there was a recall filed yet on this. He saw another car this year with exactly the same problem. He said the sensors have been contaminated. He found corrosion in the connections of both rear wheel speed sensors. Which would require replacement of both wheel bearing/sensor assy's and connectors to get the system functioning again. My repair man said I could have ended up going right through a light or stop sign.