NHTSA Complaint #11619505 — 2019 TOYOTA RAV4

In July of 2023 at only 23K miles but out of warranty coverage, I received the Engine Maintenance Required warning for the failure of the Coolant Bypass Valve. I took it to the dealership (Alamo Toyota in San Antonio, TX) and they said it needed to be replaced and would not be covered under warranty. They quoted over $850 to do the replacement but the part was on national backorder. After returning home I started doing research and found that this is happening at a very high rate and thus there is obviously a defect to this part. Toyota should be treating this is a defect, fixing the issue and providing the fix as a recall fix. I should not have to pay near $1000 to replace a defective part with another defective part that will most likely fail again. Since I am a very low mileage driver, from July 2023 to now I have only driven 4K miles, I have not replaced the part but continually monitor the engine temperature and for any coolant leakage. I know there is now a class action lawsuit but shouldn't the NHTSA get involved due to the number of failures on RAV4s and Corollas and the lack of responsibility being taken by Toyota?