2012 Toyota RAV4 engine problems

Engine, in idle and in gear, suddenly surged. It propelled the car forward in driveway and struck a car about 1 foot-18 inches in front of it, damaging front bumper of our car and rear bumper of other car. Damage to our car was quoted at $878 and second car (our granddaughter's) was less. Reported to toyota. They sent analyst to check "black box" and reported to me accelerator pedal and brakes were ok. Not car's fault. I have experienced this surge many times since leasing the car 30 months ago but no accidents.

I was waiting at a stop light on norristown road to cross bethlehem pike in springhouse, pa at approximately 5 pm on 5/22/15. I was first in line to cross the intersection in the direction of picking up 309 south in about 1/2 mile. I had been waiting at the light for a minute or two when my car surged forward. I put both feet on the brake but I was moving into the intersection nonetheless. There was sparse traffic and it was safe for me to turn right onto bethlethem pike.