I was curious to see how the ultrasonic sensors were attached to the bumper; the rear being the easiest to gain a visual.
While under there, I noticed this.
The Highlander has an odd suspension knock; front/back/left/right. Didn't show itself during the test drive but appeared during periods of rain and when I'd run the vehicle thru the car wash with an undercarriage rinse. Once dry, the noise would disappear. The past few months, it would do it all the time, then just disappear and randomly reappear.
Because of the heat, I just cranked the tire up; I'll have to drive it a while to see if the noises are gone. I figured the cause was something stupid like this.
I wasn't to concerned other than annoyed. I was going to have the dealership take a look when I bring it in for the bumper recall.
So much for Toyota Certified Pre-Owned, 160-Point Inspection.
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