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Lambda Sensors / Probes
By OE Match
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
Fits:
Porsche 958 Cayenne 3.6ltr V6
For cars with Option Code 7GB - Emission standard ULEV 2
Diagram ref no 31
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95860613710
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
Restore accurate emissions monitoring and dependable catalytic converter diagnostics with this OE Match Lambda Oxygen Sensor. Designed for compatible Porsche applications, this sensor is specified for the cylinders 1–3 exhaust bank and is positioned AFTER the catalytic converter.
Fits:
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
Cars With Option Codes:
7GB - Emission Standard ULEV 2
Diagram Ref No 32
Also known as a downstream, post-cat or O2 sensor, the lambda sensor measures the oxygen content of the exhaust gases after they have passed through the catalytic converter. This information is transmitted to the engine control unit (ECU), allowing it to assess catalytic converter performance and monitor the emissions-control system.
Unlike the lambda sensor located before the catalytic converter, which plays a primary role in air-fuel mixture control, the downstream sensor is principally responsible for monitoring catalyst efficiency. By comparing upstream and downstream oxygen sensor signals, the ECU can determine whether the catalytic converter is processing exhaust gases effectively.
Continuous exposure to high exhaust temperatures, vibration, moisture and combustion deposits can eventually cause the sensor to respond slowly, produce inaccurate readings or fail electrically.
This OE Match Lambda Oxygen Sensor provides a high-quality replacement for a worn, contaminated or failed downstream sensor, helping restore accurate post-catalyst monitoring.
What This Product Does:
- Is specified for the cylinders 1–3 exhaust bank.
- Is installed AFTER the catalytic converter.
- Measures oxygen content in exhaust gases leaving the catalyst.
- Sends post-catalyst oxygen information to the ECU.
- Helps monitor catalytic converter efficiency.
- Works in conjunction with the upstream lambda sensor.
- Supports onboard emissions diagnostics.
- Helps identify abnormal catalytic converter operation.
- Provides information used to monitor emissions-system performance.
- Helps distinguish sensor faults from genuine catalyst deterioration during diagnosis.
- Replaces a slow, contaminated, damaged or failed downstream sensor.
- Provides an OE Match alternative for compatible Porsche applications.
Symptoms Of Wear Or Failure:
- Check engine or engine-management warning light.
- Downstream oxygen sensor-related diagnostic fault codes.
- Cylinders 1–3 bank sensor faults.
- Post-catalytic converter oxygen sensor fault codes.
- Catalyst-efficiency-related diagnostic codes.
- Intermittent engine-management warnings.
- Implausible or inconsistent oxygen sensor readings.
- Sensor response that is unusually slow during diagnostic testing.
- Sensor output remaining at an abnormal or fixed value.
- Oxygen sensor heater circuit faults.
- Failed emissions testing where applicable.
- Damaged sensor wiring or insulation.
- Corroded or damaged electrical connectors.
- Physical sensor damage caused by heat, corrosion or road debris.
Why Replacement Matters:
- The downstream lambda sensor plays an important role in the vehicle's onboard emissions monitoring system. The ECU relies on its signal to assess how effectively the catalytic converter is processing exhaust gases.
- If the sensor becomes slow or inaccurate, it can provide misleading information about catalyst performance. This may trigger persistent engine-management warning lights or catalyst-efficiency fault codes even when the catalytic converter itself is still functioning correctly.
- A defective heater circuit can also prevent the sensor from reaching its intended operating temperature efficiently, potentially interfering with accurate emissions monitoring.
- Reliable downstream sensor operation is particularly important when diagnosing catalytic converter problems. If the ECU cannot trust the post-catalyst oxygen signal, determining whether the fault lies with the sensor, engine operation or catalytic converter becomes more difficult.
- Correct diagnosis and replacement of a confirmed faulty sensor can also help prevent unnecessary replacement of a significantly more expensive catalytic converter.
- Replacing a defective component with this OE Match Lambda Oxygen Sensor helps restore accurate catalyst monitoring, reliable emissions diagnostics and dependable engine-management operation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
958906262AB
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
Restore accurate fuel-mixture monitoring and dependable engine-management performance with this OE Match Right Lambda Oxygen Sensor. Designed for compatible Porsche applications, this sensor is specified for the RIGHT side, BEFORE the catalytic converter.
Fits:- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
Diagram Ref No 18
Also known as an upstream, pre-cat or O2 sensor, the lambda sensor measures the oxygen content remaining in the exhaust gases after combustion. This information is sent to the engine control unit (ECU), allowing it to determine whether the engine is operating with a rich or lean air-fuel mixture and make precise adjustments to fuel delivery.
Because this sensor operates before the catalytic converter, it plays an important role in closed-loop fuel control. Accurate readings help maintain efficient combustion, responsive engine performance, appropriate fuel consumption and controlled exhaust emissions.
Lambda sensors operate in a particularly demanding environment, exposed to extreme exhaust temperatures, vibration and combustion deposits. Over time, the sensing element can become contaminated or slow to respond, while the heater circuit, wiring or electrical connector can also deteriorate.
This OE Match Right Lambda Oxygen Sensor provides a high-quality replacement for a worn, contaminated, damaged or failed original sensor.
What This Product Does:
- Is designed for the RIGHT-side application.
- Is positioned BEFORE the catalytic converter.
- Measures oxygen content in the exhaust gases.
- Sends exhaust oxygen information to the ECU.
- Helps determine whether the air-fuel mixture is rich or lean.
- Allows the ECU to make continuous fuel-delivery corrections.
- Supports accurate closed-loop mixture control.
- Helps maintain efficient combustion.
- Supports smooth throttle response and engine performance.
- Helps optimise fuel consumption.
- Contributes to correct exhaust emissions.
- Helps protect the catalytic converter from problems associated with incorrect fuelling.
- Replaces a slow, contaminated, damaged or failed lambda 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.
- Bank-specific 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 during diagnostic testing.
- Implausible or inconsistent lambda readings.
- Oxygen sensor heater circuit faults.
- Damaged wiring, insulation or electrical connectors.
Why Replacement Matters:
- The pre-catalytic converter lambda sensor provides essential feedback for controlling the engine's air-fuel mixture. The ECU relies on this information to make continual fuel-delivery adjustments as engine speed, load and operating conditions change.
- As a lambda sensor ages, its response may become progressively slower or less accurate without immediately failing completely. This can result in less precise mixture control and contribute to increased fuel consumption, reduced performance, unstable running and higher emissions.
- Incorrect fuelling can also affect the catalytic converter. An excessively rich mixture may allow unburned fuel to enter the exhaust system, increasing catalyst temperatures and potentially shortening catalytic converter life.
- A completely failed sensor may cause the ECU to substitute calculated values or adopt a fallback operating strategy. The engine may remain driveable, but efficiency, emissions and performance can be compromised.
- Because it is specified for the right-side, pre-catalytic converter position, correct sensor location is particularly important on engines equipped with multiple exhaust banks and lambda sensors.
- Replacing a defective sensor with this OE Match Right Lambda Oxygen Sensor helps restore accurate mixture feedback, efficient combustion and dependable engine-management performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
958906262G
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
