Keep your engine's exhaust feedback accurate with the Bosch Oxygen Sensor 16413, a downstream (downstream front) O2 sensor that installs as a direct-fit replacement for the listed applications, including the 2006 BMW 325I, 325XI, 330I and 330XI, the 2007-2013 BMW 328I, the 2008-2013 BMW 128I, the 2007-2010 BMW 335I, X3 and X5, and the 2009-2016 BMW Z4 — see the Buyer's Guide tab for the full list.
Mounted in the exhaust after the catalytic converter, this sensor measures the oxygen content of the exhaust stream and sends that signal to the engine control module, where it is used to monitor catalytic converter efficiency.
- Position: downstream (downstream front) exhaust location.
- Function: reports exhaust oxygen levels to the ECM for feedback control.
- Service: a common wear item — replacing an aged sensor helps restore accurate exhaust readings if the original sensor is the cause of the fault.
Signs the sensor may need replacing can include a check-engine light, slow sensor response, or an oxygen-sensor or converter-efficiency fault code. Diagnose the cause before replacing, since these symptoms can have other sources.
Manufacturer part number 16413.
