Have you eliminated all other variables first? My speedo died at one point, turned out to be a broken wire behind the dash. Also, check all your fuses and the connections back behind the instrument cluster. Start with the easiest first...

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth