Exhaust - Selective Catalyst Reduction (SCR) Replacement

SI B18 01 11
Exhaust Systems

September 2011
Technical Service

SUBJECT
M57Y Engine: Selective Catalyst Reduction (SCR) Replacement Procedures

MODEL
E70 with the M57Y engine produced to 10/2009
E90 with the M57Y engine produced to 9/2009

SITUATION
After diagnosis due to a Service Engine Soon lamp being on, it was determined that the SCR catalyst needs to be replaced. The new SCR catalyst is an improved design that also requires programming of the DDE via the conversion path.

Note:
This conversion is only required on 2009 MY vehicles.

PROCEDURE

Replace the SCR catalyst and the front pipe mixer. After replacement, perform a programming session with the current version of ISTA/P. Before completing the measures plan, select "Vehicle" from the top menu and select "Conversions". Next, select "Conversion, data compatibility catalytic converter". After selecting the conversion, continue with the measures plan and reprogram the vehicle.

Note:
When the ISTA system message displays:

Battery voltage only "XX.XX" V. Please connect charger.

Please note the displayed battery voltage reading in the repair order comments section.





PARTS INFORMATION








WARRANTY INFORMATION