SCR catalyst
Helps reduce nitrogen oxides using a controlled reducing-agent system.
Within the exhaust after-treatment assembly on equipped diesels.
Injected urea solution produces ammonia used in the catalyst’s reduction reactions.
A chemical finishing station for diesel exhaust.
Emissions warnings can arise from dosing, fluid quality, sensors or catalyst performance.
Condition, contamination, operating pattern and the underlying engine matter more than a universal age limit.
Sensors and joints differ greatly from complete after-treatment assemblies. First repair the cause of contamination or abnormal combustion.
BMW BluePerformance equipment is engine- and market-dependent rather than universal to all diesels.
BMW diesel models fitted with SCR after-treatment; verify the specific engine and market.