eMotors.ca and author of the article below cannot in any way be held responsible nor liable for any of the content or for any use or misuse of the information provided in the article. eMotors.ca and the author of the article cannot guarantee the accuracy or correctness of the information provided in the article, therefore, the information provided by the article can only be used at your own risk.
The content and the photos of this article are copyrighted and provided as a courtesy by

O2 Sensor

Author : bmwe34.net Posted on : 03/12/2004
Model : BMW, 5 - Series (E34) 1989-96 Category : Exhaust - Oxygen Sensor
Source : http://www.bmwe34.net
 

The Bmw Oxygen sensor measures the amount of oxygen in the exhaust after combustion and signals the computer to adjust the air/fuel mixture.

Poor performance, poor fuel economy and high emissions are the failure syndromes.

Check this great O2 sensor FAQ.



Procedure
-02 sensor socket (can be purchased at Autozone)
-Lot's of WD 40
-Rachet, extensions and u-joints
-Anti seize compound

Place the front of the car on jacks or use a ramp, then spray the old sensor with a lot of WD40 (with cold exhaust). Let it sit for awhile then you can remove the sensor with the sensor socket some extensions and u-joints. Don't forget to apply a coat of anti-seize compound on the new sensor threads. NOT on the tip!!!

In any model, you don't have to remove any part of the exhaust line.



525i

M20 : The O2 sensor is located below the #6 cylinder on the front of the exhaust pipe. The connector is located on the right-hand rear of the engine, near the electronics box.

M50 : The O2 sensor is located at the front of the catalytic converter. The connector is located on the left-hand side of the engine, below the starter.




530i - 540i
The M60 engine uses two O2 sensors located at the front of the catalytic converters.

The connector is located beneath the car under the transmission.



535i


The 535i uses a single O2 sensor located at the front of the catalytic converter under the car. The connector is located at the rear of the engine compartment, lower left-hand side.
 

Pictures

Picture 1
Picture 2

Click on the thumbnails to see larger images.

 

References

  • http://www.bmwe34.net
    •  


    Oxygen Sensor Replacement
    Model : BMW, 3 - Series (E36) 1991-99 Category : Exhaust - Oxygen Sensor
    ... reading these fuel injection codes, see the the Pelican Technical Article: Reading Fuel Injection Fault Codes. If you disconnect the oxygen sensor and ground it to the chassis, the ECU will think that the car is running really lean, and will try to richen the mixture. At the other extreme, if you disconnect the oxygen sensor, and replace it with a small AA battery that supplies 1.5 volts, the ... (more)
    Posted : 18 May 2005  
     
    O2 (Oxygen) Sensor Change (How-To)
    Model : BMW, 3 - Series (E36) 1991-99 Category : Exhaust - Oxygen Sensor
    ... me :-) 3. Look at your Exhaust. Backtrack it from the muffler, past the CAT and you will see a plug screwed into the side of exhaust. 4. Track the wire from that plug to the plastic connector (right beside the ATF fluid pans). 5. That plastic connector rests in the bracket. The bracket is being held by a bolt. To get easier access to the plug, undo that bolt and the bracket will sag down ... (more)
    Posted : 18 May 2005  
     
    Oxygen Sensor Replacement
    Model : BMW, 3 - Series (E36) 1991-99 Category : Exhaust - Oxygen Sensor
    ... reading these fuel injection codes, see the the Pelican Technical Article: Reading Fuel Injection Fault Codes. If you disconnect the oxygen sensor and ground it to the chassis, the ECU will think that the car is running really lean, and will try to richen the mixture. At the other extreme, if you disconnect the oxygen sensor, and replace it with a small AA battery that supplies 1.5 volts, the ... (more)
    Posted : 18 May 2005  
     
    About Oxygen Sensors
    Model : BMW, 3 - Series (E36) 1991-99 Category : Exhaust - Oxygen Sensor
    ... too lean, all the fuel is burned, and the extra oxygen remaining flows out into the exhaust manifold. The oxygen sensor detects the extra oxygen and the voltage signal will drop to below 0.45 volts.. 0.45 volts is usually the voltage where the car is neither running rich nor lean, this is when the cars mixture is usually perfect. Oxygen sensors usually generate an output voltage between 0.2 ... (more)
    Posted : 18 May 2005  
     
    E30 3-Series Oxygen Sensor Replacement
    Model : BMW, 3 - Series (E30) 1983-93 Category : Exhaust - Oxygen Sensor
    ... the connector free, you will want to remove the wire harness from the two clips shown in this picture (Figure 4) Once you have the connector free, you will notice it has a screw-type collar, as shown here in Figure 5. Unscrew this collar, and pull the O2 sensor plug out of the connector (Figure 6). Next, you will want to remove the small heat shield around the O2 sensor, this simply pulls off ... (more)
    Posted : 24 May 2005  
     
    Browse by title :
    # | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
    Browse by make :
    A | B | C | D | E | F | G | H | I | J | M | N | P | S | T | V