Could also just be the rim being kind of dirty and corroded and needs to be cleaned up a bit of bead sealant.

I’ve had it happen to me a couple times, tires just always lost air sort slowly, I never cared enough to bring it in just for that, not a big deal to stop by the air pump once a week or so when I was getting gas anyway.

I’m sure if you brought your car in just for that they’d probably slap some token $10-50 price on it.

But if you bring it in for another service I feel like a lot of places will just do it. I know I brought my car in to pep boys one time for an oil change or something and asked them to look at it and they just did it, no extra charge.

I feel like it’s one of those little things that no one is quite sure how to write it up in the system, and figuring it out is more of a pain in the ass than just not mentioning it to the boss, not like he’s gonna notice they used an extra scrap of sandpaper and blob of sealant anyway.