NHTSA Complaint #11436533 — 2016 NISSAN ALTIMA

I have had this 2016 Nissan Altima SR for the past 5 years (1st owner) and it just began giving me acceleration issues about 2 months ago. At random times, while at a stop, reversing, doing a u-turn or changing gears, I step on the accelerator and it will not move. I have pushed all the way down on the accelerator and it won't budge for about 10 seconds, until then, it will just throw itself at a really high speed. There is no warning or light on the dashboard stating something is wrong. It does it at random times. There have been numerous times were I have been put at risk of a car accident because of this issue. Once, I was at a green light waiting to make a left, and when I had a chance to turn before the oncoming cars, I went for it, only to have the accelerator not work and go REALLY slowly (as if it was on neutral). At that speed, I was midway and the oncoming car was honking at me as it was getting closer. I kept stepping on the accelerator and nothing would happen. Luckily, a few seconds later it threw itself to a really high speed and I was able to make it before the oncoming car hit me. I have taken it to the dealer, only to find out I would be charged $169 for a diagnostics test and even then they wouldn't guarantee anything because it doesn't have any kind of warning light on the dashboard. The dealer then stated it could possibly be the transmission or throttle body. How is it possible for me to waste so much money on something the dealer itself is so unsure of the results? How can they guarantee they can fix the issue without happening again and possibly getting into an accident? I have heard of other Altima owners who have been told it is the transmission and they change it, only to have the same problems all over again. This issue really needs to be looked at before it gets more serious and cause devastating accidents. Thankfully it has not done that to me on the fwy yet.