Faulty SMG pump relay E46 23427567719

Certain models of E46 3 Series SMG have a relay socket defect that will cause drivability issues, no start and missing gears. BMW has issued a repair kit.

SMG relay repair kit Part:                                12 63 7 545 666

BMW Defect code 23 00 90 11 00

Affected Vehicle:

Vehicle symptoms:

-Engine cuts out when braking. No Fault code stored

-During coasting, an electronic engine management LED lights up sporadically. The check engine LED is lighting up briefly and the SMG transmission is switching automatically from automatic (cruise/drive mode) to manual mode.  If sport mode has been selected, it is deactivated (sport LED goes off).  Depending on the car’s road speed, if the transmission is in manual mode, it may also upshift automatically. No fault code stored

-Engine cannot be started, start inhibitor is active. Locking and then unlocking vehicle enables the engine to be started. “EWS tampering” fault codes stored in DME.

Other checks:

Signal “trigger” to relay from DME can be confirmed at DME pin # 30

 Confirm relay is correct, this model relay is BMW part # 61366901469 it is not salmon relay type like other models.

Relay pins can be bypassed with +12v to confirm SMG pump is in working order, this will eliminate defective smg pump causing problem.

Following fault codes might be triggered for this issue 4F72 and 4FB4.