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Part Number BS503L
Manufactured to OE specifications for reliable fit and function
8 TSI VW PASSAT B7 (362) 2010–2013 2
0L4 BMW 340i GT xDrive 2017–2019 3
If it doesn't vent properly
Denso Upstream Air/Fuel Ratio Sensor for VW Jetta, Passat, Beetle and Audi A8 Auxiliary Cooling Fan Assembly Part Number BS503LDenso Air Fuel Ratio Sensor (Part 234 5145) is a direct replacement upstream oxygen sensor designed for select Volkswagen and Audi models. It measures the oxygen content in exhaust gases to help the ECU adjust the air fuel mixture for optimal combustion. Denso's OE quality sensor improves fuel economy, reduces emissions, and restores engine performance. Key Features & Benefits Advanced Technology: Wide range air fuel ratio detection for precise fuel
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