Posted this in another thread, but probably best here.
I have just had to fix my front Xenon level bracket as the weld failed between the rusty steel bracket and the aluminium arm (and slot it fits into).
I was going to go down the excellent solution by Steve (Arctic) above, but thought I would try glue first. I found an epoxy glue - "GorillaWeld titanium bond epoxy" -
https://www.ebay.co.uk/itm/332453011170
I needed to free the arm as it had seized on one ball joint (probably why it broke what was left of the weld?). Used WD40 and some persuasion then cleaned up the rust, greased it back up and now moving freely.
I cleaned up the suspension arm so it was degreased as much as possible. I used a file to remove surface rust flakes from the steel bracket and the weld material, so it fitted more flush.
You simply squeeze equal parts of the resin and hardener on to a disposable surface and using a disposable spatula mix the 2 for 30 seconds then applied it the back of the steel bracket and in 10 - 30 minutes it will set. Full cure is 24 hours.
https://photos.app.goo.gl/akcWYaiiCmonEqfw5
First photo - The drive shaft rubber damper made a purpose built rest, whilst it set.
Second photo - End result - all back together.
Have gone for a drive and job is a good 'un and holding firm.