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So I was working on my brakes and while taking off the wheel, I had a bit of an mishap... ;oops:
Anyway, this part fell out

I think this came out from this red circled part

Anyone know what this part is for and do I need to replace it ASAP?
 

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Axle dust cover. They come loose and rattle around inside the wheel.

My son's 99 hasn't had them for at least three years. But we live in CA and there's not a chance that the axle bolts would corrode with them gone.

If I lived anywhere else, I'd replace it.
 

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Yup. Just a dust cap. From the looks of the axle nut, you don't need to worry about additional rust...it's too late already :).

I wouldn't worry about it too much.
 
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