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Lambda Sensors / Probes
By OE Match
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
The OE MATCH Lambda Oxygen Sensor is a replacement exhaust-gas sensor designed for installation after the catalytic converter. Also known as an oxygen sensor, O2 sensor or post-cat lambda sensor, it monitors the oxygen content of the exhaust gases downstream of the catalytic converter.
Fits:
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
The information produced by the sensor allows the vehicle's engine management and emissions-control systems to monitor catalytic converter efficiency and identify abnormal exhaust or emissions conditions.
What This Product Does:
The lambda sensor measures the oxygen content in the exhaust gases and sends an electrical signal to the vehicle's engine control unit (ECU).
This particular sensor is positioned after the catalytic converter, meaning its primary role differs from an oxygen sensor installed before the catalyst.
The upstream sensor is generally more directly involved in monitoring combustion and fuel mixture, while the post-catalytic-converter sensor monitors the exhaust after it has passed through the catalyst.
This allows the ECU to compare exhaust-gas information and assess whether the catalytic converter is operating effectively.
The post-cat lambda sensor helps:
- Monitor catalytic converter performance
- Measure oxygen levels after the catalyst
- Support emissions-system diagnostics
- Detect abnormal catalyst operation
- Provide feedback to the engine management system
- Identify emissions-related faults
- Help maintain correct onboard diagnostic monitoring
Symptoms Of Wear Or Failure:
Lambda sensors operate in an extremely demanding environment and are continually exposed to high exhaust temperatures, combustion gases and contaminants.
Over time, the sensing element can become contaminated or respond more slowly, while wiring and electrical connections can also deteriorate.
Common symptoms of a failing post-cat oxygen sensor include:
- Check Engine Light / engine-management warning light
- Emissions-related fault codes
- Oxygen sensor fault codes
- Catalyst-efficiency fault codes
- Failed emissions testIncorrect or inconsistent sensor readings
- Slow sensor responseIntermittent engine-management warnings
- Increased emissionsAbnormal diagnostic readings
- Wiring or connector faults
- Physical damage to the sensor or cable
Depending on the vehicle's engine-management strategy, additional drivability or efficiency symptoms may also occur.
Why Replacement Matters:
The vehicle relies on accurate sensor information to monitor its engine and emissions-control systems.
If the post-cat lambda sensor becomes slow, inaccurate or completely inoperative, the ECU may no longer receive reliable information about exhaust conditions downstream of the catalytic converter.
Replacing a confirmed faulty sensor can help restore:
- Accurate exhaust oxygen measurement
- Correct catalytic converter monitoring
- Reliable emissions-system diagnostics
- Proper ECU feedback
- Reduced risk of recurring oxygen-sensor fault codes
- Correct operation of the vehicle's onboard emissions monitoring system
A functioning lambda sensor is particularly important when diagnosing emissions-related warning lights or preparing a vehicle to meet applicable emissions requirements.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95860617201
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Restore accurate air-fuel mixture monitoring and dependable engine-management performance with this OE Match Lambda Oxygen Sensor. Designed for compatible Porsche applications, this sensor is positioned before the catalytic converter, where it measures oxygen levels in the exhaust gases immediately after combustion.
Fits:
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Diagram Ref No 7
Also known as an upstream, pre-cat or O2 sensor, the lambda sensor provides essential feedback to the engine control unit (ECU). By measuring residual oxygen in the exhaust stream, it enables the ECU to determine whether the engine is operating with a rich or lean air-fuel mixture and make continuous corrections to fuel delivery.
As a pre-catalytic converter sensor, it has an important role in closed-loop fuel control. Accurate readings help maintain efficient combustion, responsive performance, appropriate fuel consumption and controlled exhaust emissions.
Lambda sensors operate under demanding conditions and are continually exposed to extreme exhaust temperatures, vibration and combustion deposits. With age, the sensing element can become contaminated or slow to respond, while the internal heater, wiring or electrical connections may also deteriorate.
This OE Match Lambda Oxygen Sensor provides a high-quality replacement for a slow, contaminated, damaged or failed original sensor.
What This Product Does:
- Measures oxygen content within the exhaust gases.
- Is designed for installation before the catalytic converter.
- Sends exhaust oxygen information to the ECU.
- Helps determine whether the engine is running rich or lean.
- Allows the ECU to make accurate fuel-delivery adjustments.
- Supports closed-loop air-fuel mixture control.
- Helps maintain efficient combustion.
- Contributes to smooth and responsive engine performance.
- Helps optimise fuel consumption.
- Supports correct exhaust emissions.
- Helps protect the catalytic converter from problems caused by incorrect fuelling.
- Replaces a worn, contaminated or failed oxygen sensor.
- Provides an OE Match alternative for compatible Porsche applications.
Symptoms Of Wear Or Failure:
- Check engine or engine-management warning light.
- Lambda or oxygen sensor-related diagnostic fault codes.
- Rich or lean mixture fault codes.
- Increased fuel consumption.
- Rough or unstable idle.
- Hesitation during acceleration.
- Poor throttle response.
- Reduced engine performance.
- Engine running excessively rich or lean.
- Strong fuel smell from the exhaust.
- Increased exhaust emissions.
- Failed emissions testing where applicable.
- Intermittent engine-management warnings.
- Slow sensor response shown by diagnostic equipment.
- Implausible or inconsistent lambda readings.
- Oxygen sensor heater circuit faults.
- Damaged wiring, insulation or electrical connectors.
Why Replacement Matters:
- The lambda sensor positioned before the catalytic converter is a key feedback component within the engine-management system. The ECU relies on its signal to continually fine-tune the amount of fuel delivered to the engine.
- As a lambda sensor ages, it may become slower to react to changes in exhaust oxygen content. A sensor does not necessarily have to fail completely to affect engine operation; delayed or inaccurate readings can result in less precise fuel corrections.
- Poor mixture control can contribute to increased fuel consumption, reduced performance, unstable running and higher exhaust emissions.
- Incorrect fuelling can also place additional stress on the catalytic converter. If the engine runs excessively rich, unburned fuel can enter the exhaust system and increase catalyst temperatures, potentially shortening catalytic converter service life.
- A failed sensor may cause the ECU to use substitute values or adopt a fallback strategy. Although the engine may continue to run, fuel efficiency, emissions and performance may be compromised.
- Replacing a defective sensor with this OE Match Lambda Oxygen Sensor helps restore accurate mixture feedback, efficient combustion and dependable engine-management operation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
958906262F
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
The OE MATCH LEFT Lambda Sensor, Before Catalytic Converter is a precision-engineered engine management and emissions control sensor designed to monitor oxygen levels in the exhaust gases before they enter the catalytic converter on the left-hand exhaust bank. Also known as an upstream oxygen sensor or pre-catalyst lambda sensor, it plays a crucial role in maintaining the correct air-fuel mixture for efficient combustion and optimal engine performance.
Fits:
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Diagram Ref No 7
The OE MATCH sensor continuously measures the oxygen content in the exhaust stream and sends real-time data to the engine control unit (ECU). Using this information, the ECU adjusts fuel injection and ignition parameters to maximise fuel efficiency, reduce emissions, and ensure smooth engine operation. This sensor delivers accurate readings, fast response times, and long-term reliability.
What This Product Does:
- Monitors oxygen levels in exhaust gases before the catalytic converter
- Provides real-time feedback to the engine control unit (ECU)
- Helps regulate the air-fuel mixture for efficient combustion
- Supports engine performance and throttle response
- Improves fuel economy and emissions control
- Ensures efficient catalytic converter operation
Symptoms Of Wear Or Failure:
- Check engine light illumination
- Poor fuel economy
- Rough idle or unstable engine operation
- Reduced engine power and acceleration
- Engine hesitation or sluggish throttle response
- Increased exhaust emissions
- Failed emissions or MOT tests
- Oxygen sensor-related fault codes stored in the ECU
Why Replacement Matters:
- Restores accurate air-fuel ratio monitoring
- Improves fuel economy and combustion efficiency
- Enhances engine performance and throttle response
- Reduces harmful exhaust emissions
- Supports proper catalytic converter function and longevity
- Prevents unnecessary engine management warning lights
- Helps maintain emissions compliance and MOT readiness
- Ensures reliable communication between the sensor and ECU for optimum engine operation
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94860613302
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
RIGHT Lambda Sensor, BEFORE Catalytic Converter.
The OE MATCH RIGHT Lambda Sensor, Before Catalytic Converter is a precision-engineered engine management and emissions control sensor designed to monitor oxygen levels in the exhaust gases before they enter the catalytic converter on the left-hand exhaust bank. Also known as an upstream oxygen sensor or pre-catalyst lambda sensor, it plays a crucial role in maintaining the correct air-fuel mixture for efficient combustion and optimal engine performance.
Fits:
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Diagram Ref No 7
The sensor continuously measures the oxygen content in the exhaust stream and sends real-time data to the engine control unit (ECU). Using this information, the ECU adjusts fuel injection and ignition parameters to maximise fuel efficiency, reduce emissions, and ensure smooth engine operation. This sensor delivers accurate readings, fast response times, and long-term reliability.
What This Product Does:
- Monitors oxygen levels in exhaust gases before the catalytic converter
- Provides real-time feedback to the engine control unit (ECU)
- Helps regulate the air-fuel mixture for efficient combustion
- Supports engine performance and throttle response
- Improves fuel economy and emissions control
- Ensures efficient catalytic converter operation
Symptoms Of Wear Or Failure:
- Check engine light illumination
- Poor fuel economy
- Rough idle or unstable engine operation
- Reduced engine power and acceleration
- Engine hesitation or sluggish throttle response
- Increased exhaust emissions
- Failed emissions or MOT tests
- Oxygen sensor-related fault codes stored in the ECU
Why Replacement Matters:
- Restores accurate air-fuel ratio monitoring
- Improves fuel economy and combustion efficiency
- Enhances engine performance and throttle response
- Reduces harmful exhaust emissions
- Supports proper catalytic converter function and longevity
- Prevents unnecessary engine management warning lights
- Helps maintain emissions compliance and MOT readiness
- Ensures reliable communication between the sensor and ECU for optimum engine operation
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94860613401
The product you are viewing cross references to these numbers
OEMatch Lambda Sensors / Probes — Fit, Function, Confidence
OEMatch Lambda Sensors / Probes components are compatible replacements engineered to original-spec dimensions and tolerances — a practical option when genuine or OEM parts are unavailable. Lambda sensors measure oxygen in exhaust gases and report to the engine control unit so fuel injection and ignition are adjusted for correct combustion in Porsche models, helping to maintain efficient running and emissions control.
Available Types
- Narrowband heated zirconia sensors for stoichiometric control
- Wideband (UEGO) sensors for precise air-fuel ratio feedback
- Pre-catalyst and post-catalyst probes for exhaust monitoring
Understanding OEMatch Lambda Sensors / Probes
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original lambda sensors / probes.
OE (Original Equipment) refers to parts matching original specifications for the lambda sensors / probes and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM lambda sensors / probes engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Lambda sensors detect oxygen content in exhaust gases and provide a feedback signal used by the ECU to regulate fuel delivery and maintain correct combustion. Sensor designs vary by application; heated elements assist rapid warm-up, while wideband units offer greater resolution for tuning and diagnostics. Correct sensor operation supports catalytic converter efficiency and engine management across a range of Porsche engines.
Benefits Include
- Restores accurate air-fuel control for stable idle and part-throttle response
- Helps reduce emissions and supports catalytic converter protection
- Improves fuel economy by enabling correct mixture control
Why Lambda Sensors / Probes Wear and Fail
- Contamination of the sensing element by oil, coolant or deposits
- Thermal cycling and element degradation from repeated extreme temperatures
- Wiring damage, connector corrosion or poor electrical contact
The Importance of Replacing with OEMatch Lambda Sensors / Probes
Replacing a degraded sensor restores reliable feedback to the ECU, reduces the risk of poor combustion or catalytic converter damage and helps keep emissions within expected limits for Porsche models. OEMatch supplies sensors chosen for compatibility with Porsche mounting and electrical interfaces to simplify replacement while supporting accurate air-fuel control.
Advantages
- Direct-fit options that match factory mounting points and electrical connections
- Available with heated elements or wideband sensing for specific applications
- Corrosion-resistant housings and common connector types for straightforward installation
