In the past 8-9 months I have had 2 sets ( of 4) tire sensors replaced. All of this happened while driving. It will first blink then display a solid blue line. The first and second time the sensors showed they were not connecting to the tires. Today the light blinked, then went to a solid blue within a few seconds. I had to drive over 50-60 miles to get to the big O store.I stopped to make sure there was enough air in the tires to drive the 50-60miles. One tire was 2 pounds lower then the other three. The low tire was increased to match the other three and I continued to the big O store in cortez, co. It turned out that I was driving appx 2 hours when the solid blue light suddenly turned off. 15ish miles later the light blinked for 2-3. miles and then went solid again. At this point I was appx 2 miles from the store. Once at the store, the tires were check and all pressures had remained the same. The sensors were checked and they were all connecting and working. I hear that altitude (6500-7000 ft) and temperature can affect the sensors (it was between 29 to 31 degree F.) I was driving on mountainous semi- winding clear roads between durango and cortez co. This happened between 11:30am-2:30pm. I was driving between 35-65- mph ( from manco to durango to cortez, co I am getting ready to drive down to albuquerque ( 3.5- 4 hrs) on many 2 lane roads and don't want to experience any car problems on roads with no place to pull off. Please advise. [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Mancos, CO, USA

While driving the car at approximately 10 mph the ABS and brake lights came on. At the same time the ABS felt like they engaged. After researching the problem online I found out that many users in the us and Canada are having the same problem due to faulty ABS wheel speed sensors on the wheel hub. Due to the salt on the roads during the winter months, salt can enter the sensor and corrode the terminals. This is due to a poor seal between the connector and the wiring harness. When salt water enters the terminals it causes the ABS to act up. This is true for 2007 and 2008 models according to other Yaris users. It seems that the problem has been taken care of in 2009 models. But for owners of 2008 and 2007 models problem exists even after replacing the sensor and wiring harness with new ones. This is a major safety concern since the ABS system can engage at any time possibly causing an accident and/or injury to the driver and passengers.

- Stephens City, VA, USA