Features & Specifications:
Compatibility:
2001-2006 BMW M3 3.2L
2001-2002 BMW Z3 3.2L
2004-2008 Chrysler Crossfire 3.2L
1997-2000 2002 Mercedes-Benz C230 2.3L
2001-2005 Mercedes-Benz C240 2.6L
1996-2000 Mercedes-Benz C280 2.8L
2002-2004 Mercedes-Benz C32 AMG 3.2L
2001-2005 Mercedes-Benz C320 3.2L
1996-1997 Mercedes-Benz C36 AMG 3.6L
1998-2000 Mercedes-Benz C43 AMG 4.3L
2005-2006 Mercedes-Benz C55 AMG 5.5L
1998-2001 Mercedes-Benz CL500 5.0L
2003-2006 Mercedes-Benz CL600 5.5L
2001-2002 Mercedes-Benz CL600 5.8L
1998-1999 Mercedes-Benz CL600 6.0L
2005-2006 Mercedes-Benz CL65 AMG 6.0L
1998-2000 2003-2005 Mercedes-Benz CLK320 3.2L
1999-2000 Mercedes-Benz CLK430 4.3L
2003-2006 Mercedes-Benz CLK500 5.0L
2003-2006 Mercedes-Benz CLK55 AMG 5.5L
2006 Mercedes-Benz CLS500 5.0L
2006 Mercedes-Benz CLS55 AMG 5.5L
2007 Mercedes-Benz E280 3.0L
2008-2009 Mercedes-Benz E300 3.0L
1997-2000 2003-2005 Mercedes-Benz E320 3.2L
2006-2009 Mercedes-Benz E350 3.5L
1997 Mercedes-Benz E420 4.2L
1998-2000 Mercedes-Benz E430 4.3L
2003-2006 Mercedes-Benz E500 5.0L
1999-2001 2003-2006 Mercedes-Benz E55 AMG 5.5L
2007-2009 Mercedes-Benz E550 5.5L
2002-2008 Mercedes-Benz G500 5.0L
2003-2011 Mercedes-Benz G55 AMG 5.5L
1998-2003 Mercedes-Benz ML320 3.2L
2003-2005 Mercedes-Benz ML350 3.7L
1999-2001 Mercedes-Benz ML430 4.3L
2002-2007 Mercedes-Benz ML500 5.0L
2002 Mercedes-Benz ML55 AMG 5.4L
2000-2003 Mercedes-Benz ML55 AMG 5.5L
2006-2007 Mercedes-Benz R500 5.0L
1997-1999 Mercedes-Benz S320 3.2L
1996-1999 Mercedes-Benz S420 4.2L
2000 Mercedes-Benz S430 4.3L
1996-2000 Mercedes-Benz S500 5.0L
2003-2006 Mercedes-Benz S600 5.5L
2001-2002 Mercedes-Benz S600 5.8L
1996-1999 Mercedes-Benz S600 6.0L
2006 Mercedes-Benz S65 AMG 6.0L
1997 Mercedes-Benz SL320 3.2L
1996-2006 Mercedes-Benz SL500 5.0L
2003-2008 Mercedes-Benz SL55 AMG 5.5L
2004 Mercedes-Benz SL600 5.5L
1996-2002 Mercedes-Benz SL600 6.0L
1998-2004 Mercedes-Benz SLK230 2.3L
2002-2004 Mercedes-Benz SLK32 AMG 3.2L
2001-2004 Mercedes-Benz SLK320 3.2L
2005-2009 Mercedes-Benz SLK55 AMG 5.5L
location:Upstream: location is between the catalytic converter and the engine
Downstream: location is between the catalytic converter and the tailpipe
Oxygen Sensor Q & A
1.How are the oxygen sensors identified on a scan tool?
When displayed on a scan tool, the right and left upstream oxygen sensors are typically labeled Bank 1, Sensor 1 and Bank 2, Sensor 1. The Bank 1 sensor will always be on the same side of a V6 or V8 engine as cylinder number one.
On a scan tool, the downstream sensor on a four or straight six cylinder engine with single exhaust is typically labeled Bank 1, Sensor 2. On a V6, V8 or V10 engine, the downstream O2 sensor might be labeled Bank 1 or Bank 2, Sensor 2. If a V6, V8 or V10 engine has dual exhausts with dual converters, the downstream O2 sensors would be labeled Bank 1, Sensor 2 and Bank 2, Sensor 2. Or, the downstream oxygen sensor might be labeled Bank 1 Sensor 3 if the engine has two upstream oxygen sensors in the exhaust manifold (some do to more accurately monitor emissions).
It's important to know how the O2 sensors are identified because a diagnostic trouble code that indicates a faulty O2 sensor requires a specific sensor to be replaced. Bank 1 Sensor 1 might be the back O2 sensor on a transverse V6, or it might be the one on the front exhaust manifold. What's more, the O2 sensors on a transverse engine might be labeled differently than those on a rear-wheel drive application. There is not a lot of consistency as from one vehicle manufacturer to another as to how O2 sensors are labeled, so always refer to the OEM service literature to find out which sensor is Bank 1 Sensor 1 and which one is Bank 2 Sensor 1. This information can be difficult to find. Some OEMs clearly identify which O2 sensor is which but others do not. If in doubt, call a dealer and ask somebody in the service department.
2.What's the difference between a "heated" and "unheated" oxygen sensor?
Heated oxygen sensors have an internal heater circuit that brings the sensor up to operating temperature more quickly than an unheated sensor. An oxygen sensor must be hot (about 600 to 650 degrees F) before it will generate a voltage signal. The hot exhaust from the engine will provide enough heat to bring an O2 sensor up to operating temperature, but it make take several minutes depending on ambient temperature, engine load and speed. During this time, the fuel feedback control system remains in "open loop" and does not use the O2 sensor signal to adjust the fuel mixture. This typically results in a rich fuel mixture, wasted fuel and higher emissions.
By adding an internal heater circuit to the oxygen sensor, voltage can be routed through the heater as soon as the engine starts to warm up the sensor. The heater element is a resistor that glows red hot when current passes through it. The heater will bring the sensor up to operating temperature within 20 to 60 seconds depending on the sensor, and also keep the oxygen sensor hot even when the engine is idling for a long period of time.
Heated O2 sensors typically have two-three or four wires (the extra wires are for the heater circuit). Note: Replacement O2 sensors must have the same number of wires as the original, and have the same internal resistance.
The OBD II system also monitors the heater circuit and will set a trouble code if the heater circuit inside the O2 sensor is defective. The heater is part of the sensor and cannot be replaced separately, so if the heater circuit is open or shorted and the problem is not in the external wiring or sensor connector, the O2 sensor must be replaced.
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