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Old 01-14-2013, 03:05 PM
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vintage42 vintage42 is offline
BMW CCA 1405
Location: Louisville, KY
 
Join Date: Jun 2007
Posts: 1,337
Mein Auto: 1997 BMW Z3 1.9 5MT
I don't know about a Z4, but a Z3 does not know when you change its oil.

On a Z3 you can stick a wire into the diagnostic port under the hood per these instructions:
http://forums.bimmerforums.com/forum...48&postcount=5
http://www.unofficialbmw.com/e36/ele...ce_lights.html

Also for a Z3 you can buy a foolproof tool here. It is cheap but takes 3 weeks to arrive from China:
http://www.ebay.com/itm/120830233463...84.m1497.l2649

A similar procedure and tool probably exists for the Z4, but I don't know about them.

Last edited by vintage42; 01-14-2013 at 03:10 PM.
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