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Lambda Sensors / Probes
By OE Match
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
The OE MATCH Lambda Oxygen Sensor is an exhaust-gas sensor designed for installation before the catalytic converter, also known as the pre-cat or upstream position.
Fits:
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Diagram Ref No 7
The sensor measures the oxygen content of the exhaust gases leaving the engine and sends this information to the engine control unit (ECU). The ECU uses this feedback as part of its engine-management strategy to maintain the correct air/fuel mixture and efficient combustion.
What This Product Does:
The lambda sensor continuously measures the amount of oxygen remaining in the exhaust gases.
This information allows the ECU to determine whether the engine is operating with a mixture that is relatively rich or lean. The ECU can then make appropriate adjustments to fuel delivery to maintain efficient combustion under applicable operating conditions.
A correctly functioning pre-cat oxygen sensor helps:
- Monitor the engine's air/fuel mixture
- Provide exhaust oxygen information to the ECU
- Support accurate fuel-control adjustments
- Promote efficient combustion
- Maintain responsive engine operation
- Support good fuel economy
- Reduce unnecessary exhaust emissions
- Help protect catalytic converter performance
Symptoms Of Wear Or Failure:
Lambda sensors operate in an extremely demanding environment and are continually exposed to hot exhaust gases, combustion deposits and repeated temperature cycles.
As a sensor ages, its response can become slower or its readings can become inaccurate.
Common symptoms of a worn or failing pre-cat oxygen sensor can include:
- Check Engine Light / engine-management warning
- Lambda or oxygen-sensor fault codes
- Rich or lean mixture fault codes
- Increased fuel consumption
- Poor fuel economy
- Rough or inconsistent idle
- Hesitation during acceleration
- Reduced engine response
- Increased exhaust emissions
- Failed emissions test
- Irregular engine operation
- Incorrect or slow sensor readings during diagnostics
- Damaged wiring or electrical connectors
The exact symptoms depend on the nature of the failure and the vehicle's engine-management strategy.
Why Replacement Matters:
The ECU depends on accurate information from the pre-cat lambda sensor to help manage combustion effectively.
If the sensor becomes slow or inaccurate, the ECU may receive incorrect information about the oxygen content of the exhaust gases. This can affect fuel control and potentially lead to poor engine operation, increased fuel consumption and higher emissions.
Replacing a confirmed defective sensor can help restore:
- Accurate air/fuel mixture feedback
- Correct engine-management operation
- Efficient fuel delivery
- Smoother engine performance
- Improved fuel economy where the failed sensor was causing excessive consumption
- Correct emissions monitoring
- Reduced risk of recurring lambda-related fault codes
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95560616802
The product you are viewing cross references to these numbers
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
Restore accurate air-fuel mixture monitoring and dependable engine-management operation with this OE Match Lambda Oxygen Sensor. Designed for compatible Porsche applications, this sensor is installed before the catalytic converter, where it measures the oxygen content of the exhaust gases leaving the engine.
Fits:
- Porsche 957 Cayenne S 4.8L 2007-10
Diagram Ref No 6
Also known as an upstream, pre-cat or O2 sensor, the lambda sensor provides critical feedback to the engine control unit (ECU). By monitoring residual oxygen in the exhaust stream, it allows the ECU to determine whether the engine is running richer or leaner than intended and make continuous adjustments to fuel delivery.
Accurate pre-catalyst lambda sensor information is important for maintaining efficient combustion, responsive performance, fuel economy and emissions control. Unlike a downstream sensor, which is commonly used to monitor catalytic converter performance, the before-catalytic-converter sensor has a direct role in fuel-mixture regulation.
Lambda sensors operate in an extremely demanding environment and are continually exposed to high exhaust temperatures and combustion by-products. Age, contamination, wiring damage or deterioration of the sensing element can eventually cause slow, inaccurate or failed readings.
This OE Match Lambda Oxygen Sensor provides a high-quality replacement for a worn or defective pre-cat sensor, helping restore accurate mixture feedback and correct engine-management operation.
What This Product Does:
- Measures oxygen content in the exhaust gases.
- Is positioned before the catalytic converter.
- Provides air-fuel mixture feedback to the ECU.
- Helps the ECU determine whether combustion is rich or lean.
- Allows continuous adjustment of fuel delivery.
- Supports accurate closed-loop fuel control.
- Helps maintain efficient combustion.
- Contributes to consistent engine performance and throttle response.
- Helps optimise fuel consumption.
- Supports correct operation of the emissions-control system.
- Helps protect the catalytic converter from problems associated with incorrect fuelling.
- Replaces a slow, contaminated, damaged or failed oxygen sensor.
- Provides an OE Match replacement for compatible Porsche applications.
Symptoms Of Wear Or Failure:
- Check engine or engine-management warning light.
- Oxygen sensor or mixture-related diagnostic fault codes.
- Increased fuel consumption.
- Rough or unstable idle.
- Engine hesitation. Poor throttle response.
- Reduced engine performance.
- Engine running excessively rich.
- Engine running excessively lean.
- Increased exhaust emissions.
- Strong fuel smell from the exhaust.
- Failed emissions testing where applicable.
- Intermittent engine-management faults.
- Slow or implausible lambda sensor readings during diagnostic testing.
- Damaged sensor wiring or electrical connector.
- Heater circuit-related sensor faults where applicable.
Why Replacement Matters:
- The pre-catalytic converter lambda sensor is a key feedback device for the engine's fuel-management system. When operating correctly, it allows the ECU to continually fine-tune the air-fuel mixture as driving conditions change.
- As a lambda sensor ages, its response can become slower even before it fails completely. Delayed or inaccurate feedback may cause the ECU to make less precise fuelling corrections, potentially resulting in increased fuel consumption, reduced performance and higher emissions.
- Incorrect fuelling can also affect the catalytic converter. An excessively rich mixture may allow unburned fuel to enter the exhaust, potentially causing the catalyst to operate at abnormally high temperatures. Persistent lean-running conditions can also contribute to poor engine operation and increased combustion temperatures.
- A failed sensor may cause the ECU to rely on substitute values or an alternative control strategy. While the vehicle may continue to operate, performance, efficiency and emissions can be compromised.
- Replacing a defective component with this OE Match Pre-Catalytic Converter 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.
94860613102
The product you are viewing cross references to these numbers
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
The OE MATCH Lambda Sensor, After Catalytic Converter is a critical emissions control and engine management component designed to monitor the oxygen content of exhaust gases after they have passed through the catalytic converter. Also known as a post-catalyst oxygen sensor, it provides feedback to the engine control unit (ECU) regarding catalytic converter efficiency and overall emissions system performance.
Sold Each.
x2 Required Per Car.
Fits:
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Diagram Ref No 21
This OE MATCH lambda sensor helps ensure the vehicle meets emissions standards while allowing the ECU to continuously monitor and optimise engine operation. By accurately measuring oxygen levels in the exhaust stream, it supports efficient emissions control and helps identify catalytic converter performance issues before they become more serious.
What This Product Does:
- Monitors oxygen levels in exhaust gases after the catalytic converter
- Measures catalytic converter efficiency and performance
- Provides real-time feedback to the engine control unit (ECU)
- Supports emissions control system monitoring
- Helps maintain compliance with emissions regulations
- Assists the ECU in diagnosing exhaust and catalyst-related faults
Symptoms Of Wear Or Failure:
- Check engine light illumination
- Catalytic converter efficiency fault codes
- Failed emissions or MOT tests
- Increased exhaust emissions
- Reduced fuel economy in some cases
- Engine management warning messages
- Oxygen sensor-related fault codes
- Incorrect catalytic converter monitoring data
Why Replacement Matters:
- Restores accurate exhaust oxygen monitoring
- Ensures proper catalytic converter efficiency monitoring
- Helps maintain emissions compliance and MOT readiness
- Prevents persistent engine management warning lights
- Supports efficient engine management system operation
- Allows accurate diagnosis of catalyst and exhaust system performance
- Reduces the risk of increased emissions and environmental impact
- Maintains long-term reliability of the emissions control system
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
958906262Q
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
