The driver side upper boot was completely split and corrosion was visible inside the loose joint. The passenger side upper boot was split about halfway through-- so failure was coming and Tesla recommends replacing them in pairs anyway.
Interestingly, when I had both of the sway bar links out of the car, I looked them over and noted that the upper joints of both were very rusty. The corrosion seems oddly placed, because they're sheltered from the wheels behind the steering knuckle and I'd think that moisture would drain off the upper joints quickly just from gravity... unless they're somehow getting dripped on from above?
A notable data point-- as you can see the video-- one of the new sway bar links arrived with most of the paint on the backside of the upper joint missing/removed. Could this be a common defect in that even links that appear to have proper paint are actually NOT properly ADHERED paint and that leads to the corrosion and failure?
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