NOx Sensor Replacement Volkswagen Touareg 2014 3.0 TDI
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NOx sensor replacement on a 2014 Volkswagen Touareg 3.0 TDI. Photo shows the engine bay: the NOx sensor (silver) is threaded into part of the exhaust system under the heat shield, with black wiring from the sensor; on the right, the control unit and electrical connectors. The NOx sensor measures nitrogen oxide levels in the exhaust and is part of the diesel emission control system. Replacing the sensor ensures correct operation and compliance with emission standards.
