Have any of you every taken apart a B+M IQ-X? I've got a four year old one that started giving me some trouble. I plan to replace it but I'd love take it apart for a fun little project first. The housing is clearly three separate pieces but I can't get them apart no matter how I twist. There's always the possibility there some corrosion holding things together but I'm stumped!

Buy an identical replacement, and keep the old one. If the new light starts giving you trouble, you can open the worst one with your choice of a Dremel or a three pound sledge. How to disassemble the other one should be obvious.

Hahaha, that's basically where I came down on it too. There's a new one in the mail and the old one is sitting in a box now.

I can never remember how B&M lights come apart. I want to take a Cyo apart and the most obvious thing isn't how it comes apart

A bit late to the party but nonetheless i throw in two useful links for disassembly with a lot of pictures. However, there is a catch, those are written in german, sorry...
https://www.mtb-news.de/forum/t/der-.../post-13550927
forumslader. de/forumslader-pro/zubehoer-flv6-pro/iq-x-fuer-forumslader/ --> Open at the bottom of the page "montage IQ-X für Forumslader" (sorry no link, it is an http link which is not accepted by the forums' software, so you need to do copy&paste..

second link gave me page not found, I'm not sure why link

Thanks for the pictures, it looks like the guts of this light are too big for the case.

the software made an http to an https link. the second link is not a https, but an https Link. should work now

Website run through Google magic.

THANK YOU- I actually only removed the first piece on Sunday and need to get a smaller torx set to do the next step so the timing is excellent!

My German is pretty rusty but my reading comprehension is still mostly okay so I'm enjoying the original!