What is the construction and purpose of lambda sensors and O2 sensors?

Lambda sensors and O2 sensors are measuring elements mounted in the exhaust system, most often in the manifold, exhaust pipe, or near the catalytic converter. A typical sensor consists of a body with a thread, a measuring part, a cable, and an electrical connector. Their purpose is to read the oxygen content in exhaust gases and transmit data to the engine control unit. Depending on the version, they can operate as control or diagnostic sensors.

What are lambda sensors and O2 sensors used for?

Lambda sensors and O2 sensors are used to control exhaust gas composition and correct the air-fuel mixture. Thanks to them, the control unit can maintain proper combustion, reduce fuel consumption, and support the effective operation of the catalytic converter. Their operation also affects idle stability and engine response to load. Incorrect readings can cause emission errors, poorer dynamics, and problems with exhaust system diagnostics.

What role does the lambda sensor socket play?

The lambda sensor socket is a threaded mounting point made in an exhaust system component. It serves to stably seat the sensor in a place where exhaust flow allows for accurate oxygen content measurement. Its condition is important for connection tightness, proper tightening, and the safety of the sensor cable. A damaged thread or improper cable positioning can hinder installation and subsequent service.

How to choose the right lambda sensor for a specific car?

It is best to compare the OEM part number, interchangeable numbers, fuel type, and mounting location before or after the catalytic converter. It is also worth checking the plug type, number of wires, and compatibility with the engine version. If the car has several equipment variants, verification by VIN will be helpful.

What symptoms indicate a problem with a lambda sensor or O2 sensor?

Most often, rough engine operation, higher fuel consumption, poorer throttle response, and a "check engine" light appear. There may also be an increase in exhaust emissions and errors related to mixture correction or catalytic converter efficiency. Symptoms should be confirmed by computer diagnostics and live parameter monitoring.

What should be paid attention to when installing a used lambda sensor?

Before installation, you must check the condition of the thread, cable, shield, and electrical connector. It is also important to route the harness correctly away from very hot components and match the part to the specific mounting position. If necessary, it is also worth checking the cooperating exhaust system gaskets: tightness and engine efficiency.

Lambda probes and O2 sensors

At Global Parts, we offer a wide selection of original used car parts, including lambda sensors and O2 sensors for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Our lambda sensors and O2 sensors undergo quality control to ensure you receive a top-quality product.

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Mercedes W907 OM654 Diesel NOX Lambda Sensor A0009054814

€70.95

Part no. A0009057809-1

Exhaust Pressure Sensor Mercedes W177 W246 M260 Petrol DPF A0009057809

€23.95

Part no. A0035428518

Mercedes W204 C207 W212 Lambda Probe Oxygen Sensor M271 Petrol A0035428518

€23.95

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Mercedes W176 W242 Lambda Sensor Oxygen Probe Diesel A220 CDI A0105422618

€108.95

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Mercedes W177 W247 Exhaust Pressure Sensor DPF Exhaust Hoses A0009055307

€23.95

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Mercedes C205 Diesel Exhaust Gas Temperature Sensor EGT A0009059705

€23.95

Part no. A0085426118

Mercedes W204 W212 Lambda Oxygen Sensor M276 A0085426118

€146.95

Part no. A0065424918

Mercedes W204 W212 Diesel Lambda Sensor Oxygen Probe A0065424918

€23.95

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Mercedes W176 W447 Exhaust Pressure Sensor DPF OM626 Diesel 227701177R

€56.95

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Mercedes Sprinter W906 OM651 Diesel Gas Exhaust Temperature Sensor A0009059205

€32.95

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NOX Sensor Mercedes W204 W212 C253 Lambda Oxygen Probe A0095425518

€23.95

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NOX Sensor Mercedes W205 W213 W906 W247 Lambda Oxygen Probe A0009057803

€123.95

Part no. AG9112B591BB

Ford Mondeo MK4 S-MAX Galaxy MK3 Exhaust Gas Temperature Sensor AG9112B591BB

€23.95

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Mercedes R172 Gas Exhaust Temperature Sensor A0009059405

€113.95

Part no. A0085427018

Mercedes W204 W212 Lambda Sensor Exhaust Probe Left N/S M276 Petrol A0085427018

€23.95

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Lambda Probe Mercedes W204 W205 W213 M278 Petrol Oxygen Sensor A0075426418

€23.95

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Mercedes W164 Exhaust Gas Temperature Sensor Pipe Line A0051539028

€23.95

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Mercedes W176 W246 OM651 Diesel Exhaust Pressure Sensor DPF A0071536028

€23.95

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Mercedes R172 OM651 Diesel Exhaust Gas Temperature Sensor A0009051132

€32.95

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Exhaust Pressure Sensor Mercedes W177 W246 M260 Petrol DPF A0009057809

€23.95

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Mercedes W204 OM646 Diesel Engine Exhaust Gas Temperature Sensor A0019053000

€32.95

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Lambda Oxygen Sensor Mercedes ML W166 C207 W212 C218 M276 Turbo A0005421000

€37.95

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Lambda Sensor Mercedes W204 W212 Oxygen Sensor Lambda Probe A0065422018

€42.95

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Mercedes W221 Exhaust Catalytic Converter Oxygen Sensor A0009058800

€23.95

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NOX Sensor Mercedes W213 X253 M274 Lambda Oxygen Probe A0005423100

€23.95

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Mercedes W220 Oxygen Sensor Lambda Probe A0015405117

€23.95

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Mercedes W447 Lambda Oxygen NOX Sensor A0009052709

€70.95

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Lambda Probe Mercedes C216 W204 W221 OM274 Catalytic Converter Lambda Sensor

€47.95

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Mercedes W906 Gas Exhaust Temperature Sensor A0009053705

€23.95

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Temperature Sensor Mercedes W205 W223 C253 Exhaust Gas Control A0009050713

€37.95

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Mercedes W204 C207 W212 M271 Lambda Sensor Oxygen Probe A0065422718

€23.95

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Mercedes W177 W247 M260 Diesel Exhaust Gas Temperature Sensor A2601500400

€23.95

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Mercedes W177 W247 DPF Exhaust Pressure Sensor Bracket Mount Holder A1774902502

€23.95

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Mercedes W204 S204 W212 S212 NOX Lambda Probe Oxygen Sensor Control A0075420018

€56.95

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Door Pressure Sensor Mercedes W205 W213 C253 Unit Front Left N/S A2139051115

€32.95

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Lambda Sensor Mercedes C118 W177 W247 M260 Oxygen Probe A0005422404

€23.95

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Lambda Sensor Mercedes C118 W177 W247 M282 Oxygen Probe A0005424404

€23.95

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Mercedes W206 Sonde Lambda Oxygen Sensor 4 Pin A0005421312

€51.95

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Mercedes W212 W218 W906 OM651 Diesel Exhaust Pressure Sensor DPF A6429050200

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Mercedes W205 C205 S205 Exhaust Temperature Gas Sensor Control Unit A2055400094

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Mercedes W176 W246 Lambda Oxygen Sensor Probe Exhaust Wiring A0075426318

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