Fixing AdBlue Fault 80518D | AdBlue Leak, Line Replacement & SCR Repair /BMW G31 530D

A detailed step-by-step repair of an AdBlue system failure, from diagnosing multiple SCR errors to replacing a damaged AdBlue line. Watch how I clean the crystallized deposits, remove the old line, and install a new OEM one by following the correct routing. The system will reset only after proper AdBlue operation is restored.