Deano 1 Report post Posted June 17, 2009 Hi..doing a conversion for a friends E21 323i to M20B25 motronic. The loom we are using came from SAF assembled 1989 325i with what looks like motronic 1.3 ( 3 rows on the ECU connector and ECU number ending in 173 ). On the front part of the loom there is the round connector for the 02 sensor but there was nothing connected. I am assuming that that its not needed due to the fact it has no CAT....? Quote Share this post Link to post Share on other sites
Jamez 2147483647 Report post Posted June 17, 2009 if there is no sensor don't worry about it, mine has the plug but no sensor. Quote Share this post Link to post Share on other sites
