I purchased a brand new 2012 toyota sequoia. since i bought the vehicle, the vehicle has had idle/accelerator problems, erratic problems with excessive transmission downshifting, racing, surging, and fluctuation of engine rpm's, making the vehicle difficult to stop safely. when i first purchased the vehicle, the service department explained to me that it was a new vehicle and it needed time,??one thousand miles,?? for the engine to break in. their initial solution to my vehicle'??s problem did not rectify itself. i have had to return it to the dealership 2 times for repair. they stated that they have confirmed my concerns with the vehicle but it could not be repaired. that it is a design characteristic of the vehicle, that's the way they act, and that it had something to do with fuel-cutting or transmission shifting. he further stated that he forwards his report to toyota engineers and if there are enough complaints that they will re-write and update the software for the vehicle. obliviously a safety issue...please advise. *tr