Did my first oil change today on the X. I usually let the dealer do it the first year so if there are any issues they see I have a history of them maintaining it. Anyway, I open the hood and right off see the battery vent cap gone, acid over the top of the battery and hold down, then I find the cap down in front of the battery by the inner fender. From the clean look of the cap and the dirtiness of where it should be on the battery it looks to have been off some time. I took it into the dealer this morning and they're trying to convince me that corrosion is normal and sometimes the caps "boil off"? I asked that the battery and hold down be replaced and got told to make an appointment for next week and they will check everything out. If they tell me there's a prorated charge to replace stuff should I just get myself a better battery? I've only got 20K on the thing so it's way too soon to be worrying about the battery. I'm up in the mountains a fair amount and want a battery I can trust.