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You should be fine. I have done a head gasket on an '05 X5 3.0 and removed the exhaust nuts you are referring to...my X5 w/ 125k miles has spent its entire life on the salty roads of NH & MA..
Unlike other BMW series (E39 & E46) the E53 X5 uses nuts AND BOLTS at the downpipe connection. The E39 and E46 uses pressed-in studs that rot away, and if they snap (likely) they have to be pounded or drilled out, which is very difficult when underneath the car.
Its a little awkward getting a wrench on both the nut and bolt at the downpipe connection on the E53 but not that difficult. If they do snap, they simply pop out with a tap.
It's unlikely that all four will snap, but if you want to be thorough, add 4 new M10 x40mm exhaust bolts, part #11621427586. They are a little pricey
Last edited by Effduration; 12-10-2020 at 12:18 PM.
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12-09-2020, 10:40 PM
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