I have been racing a lot of road cars lately(using H shifter) but I went to race the f08 today only to find out that the upshift paddle on my g25 no longer responds. All of the other buttons work, I tried in game and in the control panel dialog, it sounds the same, the microswitch or whatever inside is clicking the same as the left paddle, but it simply doesnt see the button push from the computer, I tried unplugging everything and restarting the computer, still the same.

Has anyone seen something like this before? A button suddenly not working? Would it be wise to try and open it up and see if I can find the problem?

"it would be wise" to send it back im afraid

I bet it's something simple like a loose contact or mis-alligned spring. I think the assembly of the G25 has not been great. Mine has a loose spring in the brake and I've heard of quite a few issues where bits and pieces just aren't quite put together properly. Paddles double shifting, gear stick not fully returning etc.

Usually these are things which could be simply fixed, if it weren't for the fact that you'd void your warranty by doing so. It's mostly shoddy assembly. If they'd paid more attention to the assembly procedure they might have saved a lot of money on RMAs.

Still, they probably just use the refurbed wheels / pedals / shifters they get back as the replacements for the faulty ones that come in

Well I finally got around to fixing it, it wasn't that hard to take apart and is pretty simple on the inside, there are 2 motors, a sealed gearbox, and one small pcb in the middle. There is a bundle of 5 wires going through the middle of the wheel(for the paddles and red buttons). These 5 wires are all together inside one covering I guess you could say. One of the wires(one from right paddle) had a break in the middle somehow. I couldn't see any pinches or anything in the main bundle so I'm not sure how that happened, but I could clearly tell that when moving/pulling on the wire it would go from connected to disconnected. I had to carefully remove the metal ends of the wire that plugs into the small connector and splice in another wire. It wasn't hard, but definitely not recommended if you aren't confident in your soldering/disassembly skills.