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The BMW Range
5 Series
E34
E34 520 engine conversion
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<blockquote data-quote="ALBundy" data-source="post: 73995" data-attributes="member: 15"><p>Yeah, the serial number of the motronic ECU is printed on the ECU. 173 is used on the M20B25 but some M20B20 has them as well (most of the time, imported units I was told). I have seen one on my mechanic's e34 520i 12V...one day a scruplous customer swapped it when he was not around with a 172 and he complained about the lack in power now!! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="ALBundy, post: 73995, member: 15"] Yeah, the serial number of the motronic ECU is printed on the ECU. 173 is used on the M20B25 but some M20B20 has them as well (most of the time, imported units I was told). I have seen one on my mechanic's e34 520i 12V...one day a scruplous customer swapped it when he was not around with a 172 and he complained about the lack in power now!! :D :) [/QUOTE]
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