My 01 rear bumper is a rusted POS..Have been spraying the 8 bracket mount bolts to frame with penetrant for several days...seems easier then getting to the actual bumper bolts..anyone know if the bolts are metric or SAE...before I strip them out...thanks

Not sure what size they are but it should be obvious which one it is. Use only a 6 point socket and not a 12 point. 12 point will round them off quickly.

Not sure of the size, but they are metric. At least the one I took off a 99 XJ in the JY was.

Got under there today....metric 15mm...broke all the bottom ones loose

I know I'm a bit late to the party here but I just removed mine the other day. They are a 15mm head with an M10 x 1.5mm thread

Thanks..got all the 4 bottoms out and the 2 upper inboards...i had 2 brackets on my parts shelf for 10 years...now I cant find them for the life of me...ordered 2 more came today...will drop the whole rusted junk pile over the weekend...i hate my garage

Well changed out my rusted pos for the bumper from my 92 that was in the attic forever...had to get 2 new mount brackets because I couldn't find the new ones I bought 10 years ago for the life of me...only issue was the 92 bumper mount holes did not match up with the 01 brackets...so I had to re-drill them top and bottom.... It was the bumper that I drilled.no big issue. Hardest problem was getting the old bracket bolts off...bottoms easy...top was difficult until I found that the black plastic "spray shield" at top of bumper came off...then it was fairly easy...its not an exact match but it saved me 150 bucks and 2 weeks waiting