Brakes Failed problems of the 2017 Toyota Highlander

Since it has become colder in the midwest around November 2018, I can hear a clunk or a �thunk� kind of sound when I make a complete stop or put the car in reverse. The sound is coming from the back, the area where the brakes are, both left and right side. This is in my 2017 Highlander awd xle. I have addressed it with an authorized Toyota service dealer many times but nothing has been �found� by them. They adjusted the emergency brake shoes and lubricated the emergency brake parts, but nothing has fixed it. The sound keeps coming back. I have also filed a complaint with Toyota corporate headquarters. The case is now closed due to the service dealer stating the sound is not a �defect� and they have to basically wait for more complaints to take any action. I can hear this sound anywhere from 10 to 30+ times a day when I drive around in a city and suburban setting, where I am stopping at many stop signs and red lights. It is loud enough to hear over some low to medium loud music playing. It almost sounds like the emergency brake engaging. I am worried the brakes will fail or the emergency brake will engage without me setting it. I have small children in the car with me most of the time. This needs to be addressed.

Takata recall. Strange noises and flash green light appear on display, after 1/4 miles from parking lot, the car speed up by itself, the pre-collision system (pcs) is not working, brake assist is failed, the driver cannot manually brakes the car.