Every new BMW, and all BMW cars made from 1980 on, have an oxygen sensor, often called an "O2 sensor". The oxygen sensor is part of your BMW's emissions control system and feeds data to BMW engine management computer. The oxygen sensor is positioned in the exhaust pipe and can detect rich and lean mixtures. The goal of the oxygen sensor is to help the engine run as efficiently as possible and also to produce as few emissions as possible. When your BMW oxygen sensor fails, the computer can no longer sense the air/fuel ratio, so it ends up guessing -- resulting in poor performance, poor gas mileage, and increased pollution. Make sure your BMW engine performs as it should, and doesn't use more fuel than it needs to by simply changing your oxygen sensor today. We carry Bosch oxygen sensors, and in some cases Genuine BMW oxygen sensors or OEM oxygen sensors.
Available for the following BMWs: (click icon to change BMW)
Bosch Oxygen Sensor - E23 E24 E28 E30
(more info) This direct fit Bosch oxygen sensor plugs directly into your factory connector. No cutting or splicing required. A new oxygen sensor can improve driveability and lengthen engine life. Ultimately, you achieve a smoother running engine that is more fuel efficient. Feedback from the oxygen sensor provides closed-loop control of the injected quantity of fuel for optimum air-fuel mixture, enabling virtually complete combustion to take place. Contaminants in gas and certain atmospheric conditions can drastically shorten the life of any oxygen sensor, therefore they should be checked with every periodic maintenance and changed if necessary It fits BMW E23 E24 E28 E30. Bosch # 13 049.
This item fits the following BMWs:
1984-1988 E30 BMW 325e 325es
1985-1988 E28 BMW 535i 535is
1985-1987 E24 BMW 635csi
1985-1986 E23 BMW 735i
Part #: 11781716156
(11-78-1-716-156)
Price: $169.95 (USD)
Bosch Oxygen Sensor - E24 635csi E32 735i E34 535i M5
(more info) This direct fit Bosch oxygen sensor plugs directly into your factory connector. No cutting or splicing required. A new oxygen sensor can improve driveability and lengthen engine life. It fits BMW E24 E32 E34. Bosch # 13 052.
This item fits the following BMWs:
1988-1989 E24 BMW 635csi
1989-1993 E34 BMW 535i M5
1988-1992 E32 BMW 735i 735il
Part #: 11781720537
(11-78-1-720-537)
Price: $92.95 (USD)
O2 Sensor Bung and Plug
(more info) O2 Sensor Bung and plug. This weld-in bung allows an O2 sensor to be screwed into your exhaust system. It's required for custom exhaust systems, and is also useful for air/fuel ratio measurements when dyno testing. A threaded plug is included to cap off when not in use. Bung and cap/plug are both 100% stainless steel. The bung and plug are also available separately (in case you don't need both). Simply choose your option below.
TMS Oxygen Sensor Bung Specs:
Material 304 stainless steel
1.00" / 25.4mm OD
0.50" / 12.7mm Tall
Thread size and pitch M18x1.5
TMS O2 Sensor Plug & Crush Ring Specs
Material 304 stainless steel
10mm female hex for install and removal
Thread size and pitch M18x1.5
Copper Crush Ring for leak free installation
Install Tips
Locate bung as close to engine a possible, without exceeding the maximum operating temperature for the O2 sensor. The suggested location is just down-stream of the merge-collector on each bank of cylinders.
Sensors located after upstream exhaust system leaks or too close to exhaust outlets are susceptible to poor readings or influence of ambient air
O2 Sensors exposed to exhaust gasses with too high amount of un-burnt fuel can lead to misleading readings. A possible lean reading.
Locate sensor/bung 90° to exhaust gas stream.
Locate sensor/bung in tube with a minimum of 10° up angel to prevent liquid build up in sensor element.
Use stainless steel welding wire or rod when installing bung.
Do not have bung plug or a oxygen sensor installed when welding bung in place.
Welding can distort the bung so it is recommended you chase/tap the threads of the bung after welding.
When installing O2 sensor or plug, use an O2 sensor compatible high temperature resistant grease on the threads.
Use tightening torque suggested by O2 senor manufacturer.
Oxygen Sensors (O2 Sensors)
O2 Sensor Bung and plug. This weld-in bung allows an O2 sensor to be screwed into your exhaust system. It's required for custom exhaust systems, and is also useful for air/fuel ratio measurements when dyno testing. A threaded plug is included to cap off when not in use. Bung and cap/plug are both 100% stainless steel. The bung and plug are also available separately (in case you don't need both). Simply choose your option below.
