I just replaced the VDO instrument cluster with a Motometer unit on my 1987 325i. The cluster battery died on the VDO and I had a Motometer with a good battery that was in better shape. Everything works on the Motometer except the gas gauge. The new empty is at the half full mark. I suspect that the fuel pump needs to be matched to the cluster. I have some spare pumps. Is there any way of identifying which pump is compatible with a Motometer cluster by external inspection? What years did the 325i use the VDO cluster and which the Motometer?
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Sounds like you have an early car with a late cluster...the fuel sensors are different on the two, you may be able to put your old gauge in the new cluster, im not sure
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Yes, just swap your fuel gauge from your old cluster and everything will be good.Owner - Bavarian Restoration
BMW and European Electronics Repair and Restoration
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