Bosch Oxygen Sensor P/N:16531

Keep your engine-management system reading exhaust oxygen accurately with the Bosch Oxygen Sensor 16531, a downstream sensor that installs as a direct-fit replacement for the listed applications: the 2013-2018 Audi A8 Quattro, the 2014-2018 Audi RS7, and the 2013-2018 Audi S6, S7 and S8.

Positioned downstream (after the catalytic converter), it measures the oxygen content of the exhaust gas and reports that signal to the engine control module so the ECM can monitor catalyst efficiency.

• Downstream position: mounts after the catalytic converter to sample post-cat exhaust.
• Signal for the ECM: reports exhaust oxygen so the control module can monitor converter operation.
• Direct-fit replacement: intended to replace the original sensor on the listed applications.

Signs this sensor may need replacing include an illuminated check-engine light and catalyst- or O2-related trouble codes. Because these symptoms can have other causes, diagnose the fault first; if a failed downstream oxygen sensor is the cause, this replaces it.

Interchange: Manufacturer part number 16531.