How common is it for them to go bad? My display changes but does not seem to be anywhere close to correct.

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" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
2016 AMG GTS 12,000 miles

I don't know, mine has allways been pretty accurite. I don't even know what there is to the system, never really had a reason to look at it.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

There is a repair part available to fix the outside temp sensors that use the separate temp guage, mostly 80s and 90s. It comes with a long lead, maybe ten feet in length, and can be spliced into the original lead at any place that its convenient. The system works by reading the resistance of the sensor tip. It doesn't care about the length of the wire. Later vehicles use a plug in sensor that provides an input that is shared to multiple systems.