NHTSA Complaint #11583000 — 2015 LEXUS NX

Since I am just finding out how to file a complaint I figured I would. I still have this car with me. The incident happened about 2 years ago. I was driving down the highway going to Castle Rock Colorado. When all of a sudden my car is thrown into neutral and my rpms go to 6,000. I had no way to accelerate and the car wasn't in gear to help decelerate . Since I was going down the highway at a high rate of speed trucks and cars were all around me.. I immediately turned on my four ways and pulled the car over to the side of the highway. As there was nothing wrong with the motor and it seemed like it was just with the transmission I. Decided to continue but as I continued when I got to 4 gear it would once again throw it out of gear and I couldn't accelerate and I had to pull over. At this point I knew something was wrong. I immediately got the car to a safe area and got it home and the next day got the car to the mechanic. The mechanics said that I needed a new transmission 4 gear is just missing. When the mechanic was putting back together. The very expensive $7,345.00 transmission. He got the parts directly from Lexus and when he went to test, drive the car with the same but new components the transmission immediately failed again, not allowing him to shift in the 4 gear and stalling the car putting him in danger on a busy road. When he got back to his shop he called back to Lexus to verify that the parts that he was given were correct. They verified that the new parts he was given are the old design and that he needed upgraded newer parts that lexus has designed and should have never gotten the other ones . At this point he got the proper parts again and for a second time put the upgrade parts in and it worked . By Lexus not giving the mechanic, the proper upgraded parts. Not only did they put me in danger with the part breaking the first time on the highway they put the mechanic in danger by not giving him the upgraded parts the first time ... thank you