Bosch 16438 oxygen sensor for the 2006-2009 Mercedes-Benz E350 V6 3.5L and other vehicles reads the exhaust and sends air-fuel-ratio readings to the ECU. This Bosch oxygen sensor is a heated, narrow-band switching-type unit that helps the ECU keep combustion stable and emissions down.
A check engine light, higher fuel use or rough running can mean this oxygen sensor is worn. The spark plugs or the mass airflow sensor can also be behind those signs, so find the cause before you replace the sensor.
Vehicles it fits include the 2006-2009 Mercedes-Benz E350 V6 3.5L, the 2008-2009 Mercedes-Benz E300 V6 3.0L and the 2007-2009 Mercedes-Benz E550 V8 5.5L. This listing is one sensor, and most of these vehicles take two.
Fit and size
Build and materials
One oxygen sensor with its wiring harness. A mounting bracket is not included.
Will this Mercedes E350 oxygen sensor fit a 2006-2009 E350 with the V6 3.5L engine?
Yes. Bosch 16438 is listed for the 2006-2009 Mercedes-Benz E350 V6 3.5L. If your car is not named on this page, look it up on the Buyer's Guide tab.
Does the Bosch 16438 oxygen sensor come with its wiring harness?
Yes. Bosch 16438 includes the wiring harness, which is 14.8 in long. A mounting bracket is not included.
What thread size and hex size does this Bosch oxygen sensor have?
Bosch 16438 has an M18 - 1.5 thread and a 22 mm hex. It has a round, female connector with 4 terminals.
What signs can point to a worn narrow-band oxygen sensor like this one?
A check engine light, higher fuel use or rough running can mean the sensor is worn. A shop can test the signal with the engine running.
Do I need to add anti-seize to this oxygen sensor's threads?
No. Conductive anti-seize is already applied to the threads of this oxygen sensor, and its connectors are direct-fit.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
