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7 Series - E23 / E32 (1977 - 1994)

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  #1  
Old 09-21-2011, 08:56 PM
Nightlviper Nightlviper is offline
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Mein Auto: 1988 BMW E28 M5
Exclamation 1991 E32 740iL Problem

I have a problem with Mine i have a 1993 740Il and the RPM's Don't work and the Speedometer has a lag to it, as well as the temperature needle of the engine it does not state weather it cold or hot when i start the car it just barely goes up but doesn't show anything else.. Any Help?
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  #2  
Old 09-21-2011, 11:48 PM
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PETER NEWMAN PETER NEWMAN is offline
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Mein Auto: BMW 635 CSi BMW 730i E38
Smile e32

The most likely cause is that the backup battery in the service indicator board has failed, The best solution is to buy a new si board from BMW, Trying to fit a non genuine battery is a waste of time as most times it will not work properly, You may be able to find re built boards elsewhere but again I have found that they are not very good, Peter
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Old 09-28-2011, 05:07 PM
Nightlviper Nightlviper is offline
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