This happened a month or 2 ago, but all three gauges besides my speedo are not working, they actually work for a second when I crank the car over but after that they are dead. I heard it could be a rechargeable batter behind the cluster just want to make sure that's it and not something else. Just odd that they work when I crank it and that's it?
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On the back of the dash are tons of screws and then 2 nuts, they ground the gas and temp gauges, I tightened my tamp gauge nut and it worked again. You have probably done this too but it might not be the gauges, it could be the temp sensor wires aren't getting voltage or the speedo etc. These articles have much more info than me!
http://www.pelicanparts.com/bmw/tech..._batteries.htm
Good luck!BMW tech
Umass Amherst
05 wrx sti -
With all cluster problems start with replacing fuse 10, 12, and 21 with new 7.5A fuses. Don't waste your time checking the fuses, just replace them. You'll find your gauge will work more reliably.
The rechargeable batteries you refer to are the SI board batteries. That board only controls the temp, tach, MPG and OBC. So any of those problems (after replacing fuses) can be attributed to dead SI board batteries.Owner - Bavarian Restoration
BMW and European Electronics Repair and Restoration
www.BavRest.com
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