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    BMW E46 Oxygen Sensor - O2 Sensors

    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.
    You're currently viewing parts for your (E46) 3-Series 1999-2005. Reset your chassis
    For accurate results, specify your year and model below.
    Bosch Oxygen Sensor for BMW E46, E60, E83 with M54 or M56 engine. This is the post catalytic converter oxygen sensor for cylinders 1-3.

    This item fits the following BMWs:
    3/2003-2005 E46 BMW 325i 325ci 330i 330ci - Bank 1
    2004-2005 E60 BMW 525i 530i - Bank 1
    2004-2006 E83 BMW X3 3.0i - only for automatic transmission - Bank 1
    Part #: 11787514926
    Price: $139.95 (USD) 
    Quantity:   
    This is the pre-cat oxygen sensor for cylinders 1-3 for BMW E46 M3. Bosch # 13 949.

    This item fits the following BMWs:
    2001-2006 E46 BMW M3 M3 convertible
    2001-2002 Z3 BMW M Roadster M Coupe
    Part #: 11781743994
    Price: $149.95 (USD) 
    Quantity:   
    This is the pre-cat oxygen sensor for bank 1 - cylinders 1-3 for BMW E46 E60 E83 X3 Bosch # 17 215.

    This item fits the following BMWs:
    3/2003-2005 E46 BMW 325i 325ci 325xi with M54 engine.
    3/2003-2005 E46 BMW 330i 330ci 330xi
    2004-2005 E60 BMW 525i 530i
    2004-2006 E83 BMW X3 3.0i - Automatic Transmission Only
    Part #: 11787523434
    Price: $149.95 (USD) 
    Quantity:   
    Bosch Oxygen Sensor for BMW E46, E60, E83 with M54 or M56 engine. This is the post catalytic converter oxygen sensor for cylinders 4-6.

    This item fits the following BMWs:
    3/2003-2005 E46 BMW 325i 325ci 330i 330ci - Bank 2
    2004-2005 E60 BMW 525i 530i - Bank 2
    2004-2006 E83 BMW X3 3.0i - only for automatic transmission - Bank 2
    Part #: 11787514927
    Price: $119.95 (USD) 
    Quantity:   
    This is the pre-cat oxygen sensor for bank 2 - cylinders 4-6 for BMW E46 E60 E83 X3 Bosch # 17 216.

    This item fits the following BMWs:
    3/2003-2005 E46 BMW 325i 325ci 325xi with M54 engine.
    3/2003-2005 E46 BMW 330i 330ci 330xi
    2004-2005 E60 BMW 525i 530i
    2004-2006 E83 BMW X3 3.0i - Automatic Transmission Only
    Part #: 11787523435
    Price: $159.95 (USD) 
    Quantity:   
    This is the pre-cat oxygen sensor for cylinders 4-6 for BMW E46 M3.Bosch # 13 952.

    This item fits the following BMWs:
    2001-2006 E46 BMW M3 M3 convertible
    2001-2002 Z3 BMW M Roadster M Coupe
    Part #: 11781405324
    Price: $149.95 (USD) 
    Quantity:   
    This is the post-cat oxygen sensor for cylinders 4-6 for BMW E46 E39 X3 X5 Z3 Z4. Bosch # 15 109.

    This item fits the following BMWs:
    1999-3/2003 E46 BMW 323i 323ci 325xi 328i 328ci 330i 330ci 330xi
    2001-3/2003 E46 BMW 325i 325ci only for cars with M54 engine
    1999-2003 E39 BMW 528i 525i 530i
    2004-2006 E83 BMW X3 2.5 - Bank 1 Only
    2004-2006 E83 BMW X3 3.0i - Bank 1 - Automatic Transmission Only
    2000-2006 E53 BMW X5 3.0i
    1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
    2003-2006 E85 BMW Z4 2.5i Z4 3.0i
    Part #: 11781433940
    Price: $79.95 (USD) 
    Quantity:   
    This direct fit Bosch oxygen sensor plugs directly into your factory connector. It is the pre-cat sensor. No cutting or splicing required. A new oxygen sensor can improve driveability and lengthen engine life. It fits BMW E46 E39 E38 X3 X5 Z3 Z4. Bosch # 13 477.

    This item fits the following BMWs:
    1999-3/2003 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330xi 330ci
    1999-2003 E39 BMW 525i 528i 530i M5
    1997-2003 E39 BMW 540i
    1995-2001 E38 BMW 750il
    2004-2006 E83 BMW X3 2.5i X3 3.0i
    2000-2006 E53 BMW X5 3.0i
    2000-2003 E53 BMW X5 4.4i 4.6is
    1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
    2003-2005 E85 BMW Z4 2.5i Z4 3.0i
    2000-2003 E52 BMW Z8
    Part #: 11781742050
    Price: $77.95 (USD) 
    Quantity:   
    This oxygen sensor fits the following BMWs:
    2001-2006 E46 3 Series M3 M3 Convertible
    2001-2002 Z3 M Z3 M Roadster Z3 M Coupe with S54 engine
    2006-2008 E85 E86 Z4 M Z4 M Roadster Z4 M Coupe
    Part #: 11781406621
    Price: $134.95 (USD) 
    Quantity:   
    This oxygen sensor fits the following BMWs:
    2001-2006 E46 3 Series M3 M3 Convertible
    2001-2002 Z3 M Z3 M Roadster Z3 M Coupe with S54 engine
    2006-2008 E85 E86 Z4 M Z4 M Roadster Z4 M Coupe
    Part #: 11781406622
    Price: $149.95 (USD) 
    Quantity:   
    This Genuine BMW exhaust gas temperature sensor (EGT) is mounted in the exhaust manifold on cars with the S54 6 cylinder engine including the E46 M3, MZ3 and MZ4.

    This item fits the following BMWs:
    2001-2006 E46 BMW M3
    2001-2002 Z3 BMW M Roadster M Coupe
    2006-2008 E85 BMW Z4 M Roadster M Coupe
    Part #: 11787831624
    Price: $181.95 (USD) 
    Quantity:   
    This Bosch Lambda sensor is used with aftermarket engine management systems around the world. It's a universal racing oxygen sensor but only works with specialized racing engine management, advanced air/fuel and Lambda gauges, and Bosch Motorsport ECUs and Lambda control boxes (LT4). This is not a universal sensor to work in any production BMW. This is a motorsport-only wideband O2 sensor.

    This sensor is designed to measure the oxygen content and Lambda value of exhaust gases in automotive gasoline engines. The wideband Lambda sensor LSU 4.9 is a planar ZrO2 dual cell limiting current sensor with integrated heater. Its monotonic output signal in the range of λ = 0.65 to air makes the LSU capable of being used as a universal sensor for λ = 1 measurement as well as for other Lambda ranges. The connector module contains a trimming resistor, which defines the characteristic of the sensor. The LSU4.9 operates only in combination with a special LSU-IC, used in most Bosch Motorsport ECUs and Lambda control boxes (LT4).

    The main benefit of the LSU is the robust design combined with the high Bosch production quality standard.

    Application Hints:
  • The Lambda sensor should be installed at a point which permits the measurement of a representative exhaust-gas mixture, which does not exceed the maximum permissible temperature.
  • As far as possible install the sensor vertically (cable upwards).
  • The sensor is not to be fitted near to the exhaust pipe outlet, so that the influence of the outside air can be ruled out.
  • The exhaust piping must be free of leaks in order to avoid the effects of leak-air.
  • Protect the sensor against condensation water.
  • The sensor is not to be coated or painted, nor is wax to be applied or any other forms of treatment.
  • Use only the recommended grease for lubricating the thread.

  • Application Data:
    Exhaust Gas Pressure < 4bar
    Exhaust Gas Temp Range (operating) < 930*C / 1,706*F
    Exhaust Gas Temp Range (max) < 1,030*C / 1,886*F
    Hexagon Temp < 600*C / 1,112*F
    Cable and Protective Sleeve Temp < 250*C / 482*F
    Connector Temp < 140*C / 284*F
    Max Vibration (Stochastic Peak Level) < 1,000 m/s2
    Mechanical Data:
    Weight (without cable) 120g
    Length (without cable) 84mm
    Cable Length 32.2cm
    Thread M18x1.5
    Wrench Size 22mm
    Tightening Torque 40...60Nm

    Price is per sensor.
    Part #: 0258017032
    Price: $110.00 (USD) 
    Quantity:   
    Made in the USAO2 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:
    1. Material 304 stainless steel
    2. 1.00" / 25.4mm OD
    3. 0.50" / 12.7mm Tall
    4. Thread size and pitch M18x1.5
      TMS O2 Sensor Plug & Crush Ring Specs
    1. Material 304 stainless steel
    2. 10mm female hex for install and removal
    3. Thread size and pitch M18x1.5
    4. 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.
    Part #: TEN9949O2S
    Price: $18.50 (USD)