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Upper Control Arm Sealing DIY?

2019 LR AWD Model 3. Drivers side replaced around 32k miles. Passenger still okay at 49k and I'm wondering whether I should actively do something with it.

It's the only maintenance that has had to be done on this car, other than a routine tire replacement at 26k.
I think they're proactively doing this during service now. I noticed it on my last invoice a few weeks ago. I've never had any creaking, and I didn't request it. They actually both creaked like crazy for the first day after I got it back, prompting me to wonder what they had done and that caused me to check my invoice more closely. They stopped creaking by the next day, and have been silent since.
I used lithium grease last week for the second time on the right side that was creaking. Second time I really filled up the boot with at least 10 maybe 20 cc. Was quiet for almost a week, then started to act up again. Quiet sometimes, but mostly not. I have an appointment 7/3. Hope it keeps acting up when I arrive at SC. they are charging $97.50 for diagnosis.

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