What is the function and operation of an oxygen sensor on Mercedes-Benz C230?

An oxygen sensor is essentially a galvanic battery, with the internal elements reacting to the unburned oxygen in the exhaust to produce a voltage output ranging between 0.1 volt (meaning the mixture is lean with lots of oxygen) and 0.9 volt (meaning the mixture is rich with near absent oxygen). Sixty-eight antibodies, mounted on the exhaust manifolds in front of the catalytic converters, provide feedback to the PCM about the amount of residual oxygen remaining, which the PCM uses to adjust the pulse width opened to the fuel injector to achieve maximum power, preferably that of an 14.7:1 air-fuel ratio to ensure ease of power and low levels of emissions. Sensors in array down the catalytic converters monitor catalytic efficiency, rather than attempt to control the air-fuel ratio, and generate a slow vibring voltage that measures the proportion of oxygen in the exhaust gases. Four sensors are used in V6 models, two in four-cylinder models and they are placed differently depending on the model year. Oxygen sensors need appropriate electrical connections, proper operating temperature (approximately 600-degrees F), unleaded fuel to perform best. The PCM is capable of detecting a wide range of sensor faults and enabling Diagnostic Trouble Codes to indicate a fault and shuts off open-loop fuel control when needed. To replace, it would be recommended to heat the engine so that the sensor is Warmed easy to remove electrical connector, be an appropriate tool which is the screwdriver and unscrew sensor, clean the thread and apply an anti-seize compound when re-using the old sensor. The reverse order is a good idea after installation, the torque should also be applied.

Genuine Mercedes-Benz Oxygen Sensor

Oxygen O2 Sensor

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117 Oxygen Sensors found

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Mercedes-Benz Rear Oxygen Sensor Part Number: 000-542-81-04
$124.80 MSRP: $174.00
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Rear
Fits the following Mercedes-Benz Models:
- A220 | 2019-2022 | 4Matic, Base | 4 Cyl 2.0 L GAS
- A35 AMG | 2020-2021 | 4Matic | 4 Cyl 2.0 L GAS
- C300 | 2019-2023 | 4Matic, Base | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- C43 AMG | 2023-2025 | 4Matic | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- C63 AMG S E Performance | 2024-2025 | 4Matic+ | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- CLA250 | 2020-2023 | 4Matic, Base | 4 Cyl 2.0 L GAS
- CLA35 AMG | 2020-2023 | 4Matic | 4 Cyl 2.0 L GAS
- GLA250 | 2021-2023 | 4Matic, Base | 4 Cyl 2.0 L GAS
- GLA35 AMG | 2021-2023 | 4Matic | 4 Cyl 2.0 L GAS
- GLB250 | 2020-2023 | 4Matic, Base | 4 Cyl 2.0 L GAS
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Mercedes-Benz Front Oxygen Sensor Part Number: 009-542-55-18-64
$206.40 MSRP: $288.00
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Front
- Replaces: 009-542-55-18
Fits the following Mercedes-Benz Models:
- AMG GT 63 | 2023-2025, 2019-2021 | 4Matic+, Base | 8 Cyl 4.0 L GAS
- AMG GT 63 S | 2023, 2019-2021 | Base | 8 Cyl 4.0 L GAS
- CLS400 | 2017 | 4Matic | 6 Cyl 3.0 L GAS
- E400 | 2013-2016 | 4Matic, Base, Hybrid | 6 Cyl 3.0 L GAS, 6 Cyl 3.5 L FULL HYBRID EV-GAS (FHEV)
- E63 AMG S | 2018-2021 | 4Matic, 4Matic+ | 8 Cyl 4.0 L GAS
- G63 AMG | 2013-2018 | Base | 8 Cyl 5.5 L GAS
- GL450 | 2013-2016 | 4Matic, Base | 6 Cyl 3.0 L GAS, 8 Cyl 4.7 L GAS
- GL550 | 2013-2016 | 4Matic | 8 Cyl 4.7 L GAS
- GL63 AMG | 2014-2016 | Base | 8 Cyl 5.5 L GAS
- GLC43 AMG | 2017-2023 | 4Matic | 6 Cyl 3.0 L GAS
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Mercedes-Benz Rear Oxygen Sensor Part Number: 006-542-20-18
$156.00 MSRP: $218.00
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Rear
Fits the following Mercedes-Benz Models:
- C300 | 2013-2014 | 4Matic, 4Matic Luxury, 4Matic Sport | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- C350 | 2012-2015 | 4Matic, Base, Sport | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- CL63 AMG | 2011-2014 | Base | 8 Cyl 5.5 L GAS
- CLS400 | 2015-2017 | 4Matic, Base | 6 Cyl 3.0 L GAS
- CLS550 | 2012-2018 | 4Matic, Base | 8 Cyl 4.7 L GAS
- CLS63 AMG | 2012-2014 | 4Matic, Base | 8 Cyl 5.5 L GAS
- CLS63 AMG S | 2014-2018 | 4Matic | 8 Cyl 5.5 L GAS
- E350 | 2012-2016 | 4Matic, Base, Bluetec | 6 Cyl 3.0 L DIESEL, 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- E400 | 2015-2016 | 4Matic, Base | 6 Cyl 3.0 L GAS
- E550 | 2012-2017 | 4Matic, Base | 8 Cyl 4.7 L GAS
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Mercedes-Benz Front Oxygen Sensor Part Number: 009-542-63-18-64
$265.20 MSRP: $370.00
You Save: $104.80 (29%)
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Front
- Replaces: 009-542-63-18
Fits the following Mercedes-Benz Models:
- CLS400 | 2015-2017 | 4Matic, Base | 6 Cyl 3.0 L GAS
- CLS550 | 2012-2018 | 4Matic, Base | 8 Cyl 4.7 L GAS
- CLS63 AMG | 2012-2014 | 4Matic, Base | 8 Cyl 5.5 L GAS
- CLS63 AMG S | 2014-2018 | 4Matic | 8 Cyl 5.5 L GAS
- E400 | 2015-2017 | 4Matic | 6 Cyl 3.0 L GAS
- E550 | 2012-2017 | 4Matic, Base | 8 Cyl 4.7 L GAS
- E63 AMG | 2014-2015 | 4Matic | 8 Cyl 5.5 L GAS
- E63 AMG S | 2014-2016 | 4Matic | 8 Cyl 5.5 L GAS
- GLE550e | 2016-2018 | 4Matic | 6 Cyl 3.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- S550 | 2017 | 4Matic | 8 Cyl 4.7 L GAS
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Mercedes-Benz Front Oxygen Sensor Part Number: 009-542-59-18
$158.40 MSRP: $220.00
You Save: $61.60 (28%)
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Front
Fits the following Mercedes-Benz Models:
- C300 | 2013-2014 | 4Matic, 4Matic Luxury, 4Matic Sport | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- C350 | 2012-2015 | 4Matic, Base, Sport | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- E350 | 2012-2016 | 4Matic, Base, Bluetec | 6 Cyl 3.0 L DIESEL, 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- GLK350 | 2013-2015 | 4Matic, Base | 6 Cyl 3.5 L GAS
- SL550 | 2013-2020 | Base | 8 Cyl 4.7 L GAS
- SL63 AMG | 2014-2019 | Base | 8 Cyl 5.5 L GAS
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Mercedes-Benz Rear Oxygen Sensor Part Number: 008-542-39-18
$163.20 MSRP: $228.00
You Save: $64.80 (29%)
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Rear
Fits the following Mercedes-Benz Models:
- CLS550 | 2015-2018 | 4Matic, Base | 8 Cyl 4.7 L GAS
- GLE350 | 2016-2018 | 4Matic, Base | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- ML350 | 2012-2015 | 4Matic, Base | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- ML400 | 2015 | 4Matic | 6 Cyl 3.0 L GAS
- R350 | 2012 | Bluetec 4Matic | 6 Cyl 3.0 L DIESEL
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Mercedes-Benz Rear Oxygen Sensor Part Number: 000-542-80-04
$150.00 MSRP: $210.00
You Save: $60.00 (29%)
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Rear
Fits the following Mercedes-Benz Models:
- C300 | 2018-2021 | 4Matic, Base | 4 Cyl 2.0 L GAS
- E350 | 2020-2023 | 4Matic, Base | 4 Cyl 2.0 L GAS
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Mercedes-Benz Front Oxygen Sensor Part Number: 000-542-18-00
$109.20 MSRP: $152.00
You Save: $42.80 (29%)
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor, Rear Oxygen Sensor
- Position: Front
Fits the following Mercedes-Benz Models:
- GL450 | 2015-2016 | 4Matic | 6 Cyl 3.0 L GAS
- GLE400 | 2019, 2016-2017 | 4Matic | 6 Cyl 3.0 L GAS
- GLE43 AMG | 2017-2019 | 4Matic | 6 Cyl 3.0 L GAS
- GLE450 AMG | 2016 | 4Matic | 6 Cyl 3.0 L GAS
- GLE550e | 2016-2018 | 4Matic | 6 Cyl 3.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- GLS450 | 2017-2019 | 4Matic | 6 Cyl 3.0 L GAS
- S560e | 2019-2020 | Base | 6 Cyl 3.0 L PLUG-IN HYBRID EV-GAS (PHEV)
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Mercedes-Benz Rear Oxygen Sensor Part Number: 000-542-44-00
$136.80 MSRP: $190.00
You Save: $53.20 (28%)
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Rear
Fits the following Mercedes-Benz Models:
- CLS450 | 2019-2020 | 4Matic, Base | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- CLS53 AMG | 2019-2020 | 4Matic | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- E53 AMG | 2019 | 4Matic | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
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Mercedes-Benz Front Oxygen Sensor Part Number: 000-542-31-00-64
$139.20 MSRP: $194.00
You Save: $54.80 (29%)
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Front
- Replaces: 000-542-31-00
Fits the following Mercedes-Benz Models:
- C300 | 2015-2018 | 4Matic, Base | 4 Cyl 2.0 L GAS
- C350e | 2016-2018 | Base | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- E300 | 2017-2019 | 4Matic, Base | 4 Cyl 2.0 L GAS
- GLC300 | 2016-2019 | 4Matic, Base | 4 Cyl 2.0 L GAS
- GLC350e | 2018-2020 | 4Matic | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- SLC300 | 2017-2020 | Base, Final Edition | 4 Cyl 2.0 L GAS
- SLK300 | 2016 | Base | 4 Cyl 2.0 L GAS
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Mercedes-Benz Rear Oxygen Sensor Part Number: 007-542-63-18-65
$187.20 MSRP: $260.00
You Save: $72.80 (28%)
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Rear
- Replaced by: 007-542-63-18
Fits the following Mercedes-Benz Models:
- CLA250 | 2014-2019 | 4Matic, Base | 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS
- CLA45 AMG | 2014-2019 | 4Matic | 4 Cyl 2.0 L GAS
- GLA250 | 2015-2020 | 4Matic, Base | 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS
- GLA45 AMG | 2015-2019 | 4Matic | 4 Cyl 2.0 L GAS
- Metris | 2016-2023 | Base | 4 Cyl 2.0 L GAS
- S600 | 2015-2017 | Base | 12 Cyl 6.0 L GAS
- S65 AMG | 2015-2020 | Base | 12 Cyl 6.0 L GAS
- SL65 AMG | 2013-2018 | Base | 12 Cyl 6.0 L GAS
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Mercedes-Benz Rear Oxygen Sensor Part Number: 000-542-76-11
$127.20 MSRP: $177.00
You Save: $49.80 (29%)
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Product Specifications
- Other Name: Lambda Sensor; Oxygen Sensor
- Position: Rear
Fits the following Mercedes-Benz Models:
- AMG GT 43 | 2021-2024 | Base | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- AMG GT 53 | 2019-2024 | Base | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- CLS450 | 2019-2023 | 4Matic, Base | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- CLS53 AMG | 2019-2021 | 4Matic | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- E450 | 2021-2023 | 4Matic, Base | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- E53 AMG | 2019-2023 | 4Matic | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- GLE450 | 2020-2023 | 4Matic | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- GLE450 SUV | 2022 | 4Matic | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- GLE53 AMG | 2021-2023 | 4Matic, 4Matic+ | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- GLE53 AMG SUV | 2021-2023 | 4Matic+ | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
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Mercedes-Benz LAMBDA SENSOR Part Number: 000-542-55-12-64
$129.60 MSRP: $180.00
You Save: $50.40 (28%)
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Product Specifications
- Other Name: Oxygen Sensor, Rear Oxygen Sensor
- Replaces: 000-542-55-12, 000-542-13-12
Fits the following Mercedes-Benz Models:
- C300 | 2022-2025 | 4Matic, Base | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- CLE300 | 2024-2025 | 4Matic | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- CLE450 | 2024-2025 | 4Matic | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- CLE53 AMG | 2024-2025 | 4Matic+ | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- E350 | 2024-2025 | 4Matic, Base | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- E450 | 2024-2025 | 4Matic | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- E53 AMG | 2025 | 4Matic+ | 6 Cyl 3.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- G550 | 2025 | Base | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- GLC300 | 2023-2025 | 4Matic, Base | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- GLC350e | 2025 | 4Matic | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
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Mercedes-Benz LAMBDA SENSOR Part Number: 000-542-52-12-64
$136.80 MSRP: $190.00
You Save: $53.20 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Front Oxygen Sensor, Oxygen Sensor
- Replaces: 000-542-43-00, 000-542-52-12
Fits the following Mercedes-Benz Models:
- AMG GT 43 | 2021-2024 | Base | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- AMG GT 53 | 2019-2024 | Base | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- C300 | 2018-2025 | 4Matic, Base | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- C43 AMG | 2023 | 4Matic | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- CLE300 | 2024-2025 | 4Matic | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- CLS450 | 2019-2023 | 4Matic, Base | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- CLS53 AMG | 2019-2021 | 4Matic | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- E350 | 2020-2025 | 4Matic, Base | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- E450 | 2021-2024 | 4Matic, Base | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- E53 AMG | 2019-2023 | 4Matic | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
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Mercedes-Benz Front NOx Sensor Part Number: 000-905-35-03-64
$454.26 MSRP: $635.00
You Save: $180.74 (29%)
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Product Specifications
- Other Name: Nox Sensor; Oxygen Sensor, Sensor
- Position: Front
- Replaces: 000-905-70-00, 000-905-30-00, 000-905-35-03, 003-542-88-18, 006-542-72-18
Fits the following Mercedes-Benz Models:
- E250 | 2014-2016 | Bluetec, Bluetec 4Matic | 4 Cyl 2.1 L DIESEL
- E350 | 2011 | 4Matic, Base, Bluetec | 6 Cyl 3.0 L DIESEL, 6 Cyl 3.5 L GAS
- GL320 | 2009 | Bluetec 4Matic | 6 Cyl 3.0 L DIESEL
- GL350 | 2010-2016 | Bluetec 4Matic | 6 Cyl 3.0 L DIESEL
- ML250 | 2015 | Bluetec 4Matic | 4 Cyl 2.1 L DIESEL
- ML350 | 2010-2014 | Bluetec 4Matic | 6 Cyl 3.0 L DIESEL
- R320 | 2009 | Bluetec | 6 Cyl 3.0 L DIESEL
- R350 | 2010-2012 | Bluetec 4Matic | 6 Cyl 3.0 L DIESEL
- Sprinter 2500 | 2010-2018 | Base | 4 Cyl 2.1 L DIESEL, 6 Cyl 3.0 L DIESEL
- Sprinter 3500 | 2010-2018 | Base | 4 Cyl 2.1 L DIESEL, 6 Cyl 3.0 L DIESEL
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Mercedes-Benz Front Oxygen Sensor Part Number: 009-542-62-18-64
$163.20 MSRP: $228.00
You Save: $64.80 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Front
- Replaces: 009-542-62-18
Fits the following Mercedes-Benz Models:
- AMG GT | 2017-2021 | Base | 8 Cyl 4.0 L GAS
- AMG GT Black Series | 2021 | Base | 8 Cyl 4.0 L GAS
- AMG GT C | 2018-2021 | Base | 8 Cyl 4.0 L GAS
- AMG GT R | 2018-2020 | Base | 8 Cyl 4.0 L GAS
- AMG GT R Pro | 2020 | Base | 8 Cyl 4.0 L GAS
- AMG GT S | 2016-2019 | Base | 8 Cyl 4.0 L GAS
- C400 | 2015 | 4Matic | 6 Cyl 3.0 L GAS
- C43 AMG | 2017-2023 | 4Matic | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.0 L GAS
- C450 AMG | 2016 | 4Matic | 6 Cyl 3.0 L GAS
- CLS400 | 2015-2017 | 4Matic, Base | 6 Cyl 3.0 L GAS
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Mercedes-Benz Rear Oxygen Sensor Part Number: 007-542-64-18-65
$112.80 MSRP: $157.00
You Save: $44.20 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Rear
- Replaces: 007-542-64-18, 007-542-64-18-64
Fits the following Mercedes-Benz Models:
- C300 | 2015-2018 | 4Matic, Base | 4 Cyl 2.0 L GAS
- C350e | 2016-2018 | Base | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- E300 | 2017-2019 | 4Matic, Base | 4 Cyl 2.0 L GAS
- GLC300 | 2016-2019 | 4Matic, Base | 4 Cyl 2.0 L GAS
- GLC350e | 2018-2020 | 4Matic | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- SLC300 | 2017-2020 | Base, Final Edition | 4 Cyl 2.0 L GAS
- SLK300 | 2016 | Base | 4 Cyl 2.0 L GAS
- Sprinter 1500 | 2019-2023 | Base | 4 Cyl 2.0 L GAS
- Sprinter 2500 | 2019-2023 | Base | 4 Cyl 2.0 L GAS
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Mercedes-Benz Rear Oxygen Sensor Part Number: 000-542-19-12
$123.60 MSRP: $172.00
You Save: $48.40 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Lambda Sensor; Oxygen Sensor
- Position: Rear
Fits the following Mercedes-Benz Models:
- CLA45 AMG | 2020-2023 | 4Matic | 4 Cyl 2.0 L GAS
- CLA45 AMG S | 2024-2025 | 4Matic+ | 4 Cyl 2.0 L GAS
- GLA45 AMG | 2022-2023 | 4Matic | 4 Cyl 2.0 L GAS
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Mercedes-Benz LAMBDA SENSOR Part Number: 000-542-58-12-64
$129.60 MSRP: $180.00
You Save: $50.40 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Front Oxygen Sensor, Oxygen Sensor
- Replaces: 000-542-58-12, 000-542-24-04
Fits the following Mercedes-Benz Models:
- A220 | 2019-2022 | 4Matic, Base | 4 Cyl 2.0 L GAS
- A35 AMG | 2020-2021 | 4Matic | 4 Cyl 2.0 L GAS
- C43 AMG | 2023-2025 | 4Matic | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- C63 AMG S E Performance | 2024-2025 | 4Matic+ | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- CLA250 | 2020-2023 | 4Matic, Base | 4 Cyl 2.0 L GAS
- CLA35 AMG | 2020-2023 | 4Matic | 4 Cyl 2.0 L GAS
- CLA45 AMG | 2020-2023 | 4Matic | 4 Cyl 2.0 L GAS
- CLA45 AMG S | 2024-2025 | 4Matic+ | 4 Cyl 2.0 L GAS
- GLA250 | 2021-2023 | 4Matic, Base | 4 Cyl 2.0 L GAS
- GLA35 AMG | 2021-2023 | 4Matic | 4 Cyl 2.0 L GAS
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Mercedes-Benz Front Oxygen Sensor Part Number: 009-542-56-18-64
$136.80 MSRP: $190.00
You Save: $53.20 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lambda Probe; Oxygen Sensor
- Position: Front
- Replaces: 009-542-56-18
Fits the following Mercedes-Benz Models:
- C300 | 2012 | 4Matic Luxury, 4Matic Sport | 6 Cyl 3.0 L GAS
- CLA250 | 2014-2019 | 4Matic, Base | 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS
- CLA45 AMG | 2014-2019 | 4Matic | 4 Cyl 2.0 L GAS
- G550 | 2019-2024 | Base | 8 Cyl 4.0 L GAS
- G63 AMG | 2019-2024 | Base | 8 Cyl 4.0 L GAS
- GLA250 | 2015-2020 | 4Matic, Base | 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS
- GLA45 AMG | 2015-2019 | 4Matic | 4 Cyl 2.0 L GAS
- SL400 | 2015-2016 | Base | 6 Cyl 3.0 L GAS
- SL450 | 2017-2020 | Base | 6 Cyl 3.0 L GAS
- SL550 | 2013-2020 | Base | 8 Cyl 4.7 L GAS
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Mercedes-Benz Oxygen Sensor

Mercedes-Benz Oxygen Sensor helps balance fuel and air by reading the amount of oxygen in the exhaust, providing the engine computer with rapid voltage signals to ensure that every ignition stroke is delivered with clean power and minimal waste. Housed in a tough steel case and warmed quickly by an internal heater, the sensor reaches operating temperature seconds after startup allowing the control unit to switch to closed loop early for steady idle and prompt throttle response. Its zirconia element oscillates voltage several times a second to help guide injector timing, and units downstream confirm that the catalytic converter is removing pollutants effectively. A fresh Oxygen Sensor keeps the torque lively, prevents the fuel from burning unnecessarily, and helps the catalyst to last longer, making it a small component with big influence on efficiency and emissions across the entire lineup. Beyond this vital part, the second mention Mercedes-Benz name stands for a tradition of innovation stretching from the first automobile patent to today's sleek electric sedans and connected SUVs. The company pioneers digital cabins with MBUX voice control, integrates energy recuperation in hybrids, and is building a unified MB.OS platform that ties battery management, driver assist features, and infotainment into one smart network. Styled with precise lines and crafted with high-quality materials, the brand combines comfort, performance, and technology and is evidence of why its three-pointed star is still an emblem of progressive mobility.

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Mercedes-Benz Oxygen Sensor Parts and Q&A

Oxygen Sensor
001-540-05-17
Q: What is the function and operation of an oxygen sensor on Mercedes-Benz C230?
A:
An oxygen sensor is essentially a galvanic battery, with the internal elements reacting to the unburned oxygen in the exhaust to produce a voltage output ranging between 0.1 volt (meaning the mixture is lean with lots of oxygen) and 0.9 volt (meaning the mixture is rich with near absent oxygen). Sixty-eight antibodies, mounted on the exhaust manifolds in front of the catalytic converters, provide feedback to the PCM about the amount of residual oxygen remaining, which the PCM uses to adjust the pulse width opened to the fuel injector to achieve maximum power, preferably that of an 14.7:1 air-fuel ratio to ensure ease of power and low levels of emissions. Sensors in array down the catalytic converters monitor catalytic efficiency, rather than attempt to control the air-fuel ratio, and generate a slow vibring voltage that measures the proportion of oxygen in the exhaust gases. Four sensors are used in V6 models, two in four-cylinder models and they are placed differently depending on the model year. Oxygen sensors need appropriate electrical connections, proper operating temperature (approximately 600-degrees F), unleaded fuel to perform best. The PCM is capable of detecting a wide range of sensor faults and enabling Diagnostic Trouble Codes to indicate a fault and shuts off open-loop fuel control when needed. To replace, it would be recommended to heat the engine so that the sensor is Warmed easy to remove electrical connector, be an appropriate tool which is the screwdriver and unscrew sensor, clean the thread and apply an anti-seize compound when re-using the old sensor. The reverse order is a good idea after installation, the torque should also be applied.