Steering Problems of Toyota Yaris - part 2

While driving at around 60 to 70 mph the vehicle constantly pulls to the right and to the left. I took the car to the Toyota dealer and the Toyota dealer was unable to diagnose the failure. Current mileage of this Toyota Yaris is 21,755.

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The contact owns a 2006 Toyota Yaris. While driving approximately 70 mph on normal road conditions, the brakes failed to respond when the brake pedal was depressed. The vehicle failed to slow down and spun three to four times uncontrollably into the median. The driver stopped the vehicle and observed that the front and rear passenger side tires were flattened. The tire warning indicator illuminated on the instrument panel. There were no warnings or injuries and the vehicle was not damaged. The vehicle was towed to the authorized dealer for inspection and they stated that the front and rear passenger tires were punctured, which caused excessive air pressure leakage. In addition, the rims were damaged. The tires and rims were replaced; however, the technician was unable to determine the cause of the failure. The current and failure mileages were 5,000.

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When I drive at 60mph and higher my 2009 5 door liftback Yaris with electronically assisted steering that I bought new, it has a dangerous tendency to wander. If I look away for a second, the car wanders and has often done so into other lanes. This has happened about 10 times in the year that I have owned it. I have had to adjust my driving habits to reduce the amount of times that this happens otherwise it would have happened many more times. The habits that I practice to avoid this are to pay constant attention to the road ahead of me so I don't wander out of my lane. Much more attention is needed with this car than any other of the 8 passenger cars I have owned and driven. It is very taxing on my energy level on long drives which I consider to be 3 hrs or more. I am very car savvy and I think this phenomenon is due to the angle of caster on the front suspension. Unfortunately there is no adjustment for caster on my Yaris otherwise I would try that. It does not track as straight as my previous cars of which range from heavy to light weight, from old to new, and from being equipped with power steering to no power steering. My Yaris has electronic assisted steering. I have read that the new corolla has electronic steering and those driver's complaints reflect mine. I have not complained about this earlier because I thought it was due to the combination of light weight with small size and relatively tall height. After hearing of the corolla driver's complaints and the coincidence of it being equipped with power steering, I think there may be a pattern. My theory is that the caster is set to make steering easy on the electric power steering for the reason of saving weight and money in the materials it would take to make a more robust power steering system such as bigger electric motor, bigger wires, bigger battery, bigger alternator, etc.

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The contact owns a 2007 Toyota Yaris. While driving 65mph, the vehicle jerked and constantly pulled to the left and the right. The manufacturer and the dealer were unable to diagnose the failure. The current mileage was 29,687 and failure mileage was 975.

Vehicle failed to maintain its course under sudden steering changes originated to avoid collision with another vehicle. It spun due to either lightness of the vehicle or failed steering, and hit the guard rails. The new 2007 Toyota Yaris vehicle had one new bridgestone potenza re92 tire (driver side rear) replaced by the dealer earlier that day just before the failure occurred. The vehicle was declared a total loss.