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Old 03-12-2019, 12:25 AM   #1
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Join Date: Mar 2019
Location: Monterey Park
Posts: 1
My Ride: E39 554i
330ci no communication with obd port

Hello all I have a customer which brought in a verry odd situation

He has a 2003 330ci that had a bad ZF transmission and he had a good gm transmission laying around so he swaped out the ZF for the GM and some how he got it to work using the stock DME that was paired with the ZF and the EGS for the GM trans car ran and drove fine but had the check engine light and no communication with any module.

But if I swap in the DME that was paired GM trans and GM EGS you get communication again but no start

If I swap in the ZF DME and the ZF EGS like oem I get a trans gear light and no communication

These are the oem set ups
[2003 330i ms43 zf trans]

[2005 330i ms45 gm trans]

Thank you for any help in advance

Sent from my iPhone using Tapatalk
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