Wrong Brake Pad Info for BMW
This bulletin applies to 2009-2013 BMW vehicles. The yellow “Service Due” warning light may illuminate in the instrument cluster, even though the brake pad thickness is more than 4.2mm (above the thickness at which the pad sensor intervenes). The calculated remaining service life for the brake pads (front or rear) from the condition-based system (CBS) data does not match the actual brake pad thickness.
A software update is required to avoid this incorrect information. Update vehicle software using ISTA/P 2.50.2 or later. Programming must be started under the conversion menu item “Brake pad correction CBS conversion.”
After programming, the vehicle CBS data must be corrected as follows: Using ISTA, perform vehicle CBS data correction. In the diagnostic menu item “Front/rear brake,” select “Reset forecast to 50.000km” and then reset the forecast distance. Check the remaining brake pad thickness using special tool 34 1 260. In the diagnostic menu item “Front/rear brake,” select “Set availability, enter the brake pad thickness” and enter the pad thickness measured in millimeters.