01-14-2013, 03:05 PM
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BMW CCA 1405
Location: Louisville, KY
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Join Date: Jun 2007
Posts: 471
Mein Auto: 1997 BMW Z3 1.9 5MT
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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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