True on the age, that's one factor that makes me consider just replacing the rad.

There is the posibility the radiator has been replaced by a PO, the truck is an 04 but there is a sticker on the radiator that says 05 somewhere that seems like a date, but am not sure so am erring on the side that this is the original rad.

I've priced out the radiators, thank you, but the thrifty in me kinda balks at replacing for a seam leak that seems it could be re-crimped. Of course if there were any sort of cracks or indication of weakness I'd replace it in a heartbeat, but it seems to be still structurally sound.

This radiator shop once did an e46 for me. Temp would climb when on the highway at speed. Ended up pulling down the radiator and they opened up the rad, cleaned, re crimped, and pressure tested. Problem solved thankfully, or I would have been pulling down the cylinder head next. That was 2 years ago and that rad is still fine to this day.

So previous experience was that Behr plastic rads can be opened up/repaired, but would love to hear people's experiences and comments as well.

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04 X5 3.0i auto
03 X5 4.6is