I bought this guage brand new and installed it. It worked fine for about 2-3 days then suddenly refused to power up. I've tried hooking it up right to 12v at the battery to make sure it wasnt my wiring job but it still didn't power up. If someone thinks they can fix/diagnose this, or wish to send it in for repair - they can have it for $50 o.b.o.

If you want the o2 sensor as well you can have it if you come and remove it from the car yourself