EDIT: Figured it out! See the below post.
I have a 2021 F150 XLT 2.7 2WD with 24k miles. My truck has an almost metal-clicking type sound when driving on the highway.
It seems to happen only at certain speeds. Primarily when going 48-50mph, and also around 35-37mph (and possibly other lower...
I have read in here a few times about annoying clicking when pressing the brake pedal, noticed a recall - my truck isn’t in it.
I too have these problems and after about 4 loud smacks coming from above the brake pedal I got numerous warnings, brake system failure, collision braking assist not...