Diesel Misfueling Protection Bypass Adapter
BMW Advanced Diesel vehicles are equipped with a fuel-filler neck that incorporates a misfueling protection system, to prevent gasoline from being mistakenly pumped into the vehicle. If the vehicle is started with gasoline in the fuel tank, internal engine damage will occur.
Only fuel nozzles of the recommended diameter for diesel passenger vehicles can be inserted into the filler neck. Most diesel fuel stations have fuel nozzles with the recommended diameter fitted to their passenger vehicle diesel fuel pumps. Unfortunately in some locations, fuel nozzles of different diameters may have been fitted to passenger vehicle diesel fuel pumps.
The DMBA (1) will enable refueling of the vehicle in emergency circumstances where the fuel station is using the approved Ultra-Low Sulfur Diesel (ULSD), but has a non-standard sized filling nozzle (i. e. gasoline nozzles have a smaller, 21mm diameter), or when using a larger diesel nozzle intended for use on commercial vehicles.
ULSD has a maximum sulfur content of 15 parts per million (ppm) and is labeled accordingly on the fuel pump.
