For several months the 2006 Rav4 with only 118k miles had been experiencing intermittent failure of power steering while driving at speeds between 5-20mph. These failures resulted in the steering wheel to become extremely difficult if not impossible to turn while the car is driving. In each incident, this resulted in stopping the car and putting on emergency lights until we can safely turn off the car and hopefully the issue goes away several minutes later. This issue has proven to be very dangerous when in traffic with no place to pull over and with the steering tightening up, it is not even possible to pull over in most cases. Four different mechanical shops tried to replicate the issue and none were able to determine the root cause nor replicate it consistently. This issue has been happening more frequently now and the car cannot be taken out safely. As [XXX] drivers, this is not safe by any means and Toyota should consider this a critical safety recall and cover towing costs to move this. There are no signs of instrument lights or any leaks coming from the car. This seems to be entirely a malfunction of steering components. With regard to incidents resulting from this, my mother is the primary driver, she is [XXX] old and injured her wrist trying to move the steering wheel to a safe location. Her wrist is still in pain several days later. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)