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Lambda Sensors / Probes
.jpg?width=197&height=148&format=webp "Lambda Oxygen Sensor, BEFORE Catalytic Converter. Porsche 957 Cayenne 4.8L 2007-10 - 95560616802, 95560616801")
The Genuine Porsche Lambda Oxygen Sensor 95560616802 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
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Shop Securely
12 Month Warranty
Worldwide Delivery
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
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Shop Securely
12 Month Warranty
Worldwide Delivery
The 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
Manufactured to OEM specifications, this 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
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Shop Securely
12 Month Warranty
Worldwide Delivery
The BOSCH 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 BOSCH 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
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Shop Securely
12 Month Warranty
Worldwide Delivery
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
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Shop Securely
12 Month Warranty
Worldwide Delivery
Sold individually; x2 per vehicle.
Fits:
Porsche 957 Cayenne S 4.8L V8 2007-10
Porsche 957 Cayenne GTS 4.8L V8 2007-10
Porsche 958-1 Cayenne S 4.8L V8 2011-14
Porsche 958-1 Cayenne GTS 4.8L V8 2011-14
Porsche 958-1 Cayenne Turbo / S 4.8L V8 2011-14
Porsche 958-1 Cayenne Diesel 3.0L V6 2011-14
Porsche 958-2 Cayenne Turbo 4.8L V8 2011-18
Porsche 958-2 Cayenne Diesel 3.0L V6 2011-18
Diagram ref. 26.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95560611420
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
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
- 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
Shop Securely
12 Month Warranty
Worldwide Delivery
Lambda Sensors / Oxygen Probes | Precision Fuel Control & Emissions Performance
Lambda sensors (also known as oxygen sensors or O2 probes) are vital components in your Porsche’s exhaust and fuel management system. These precision sensors monitor the level of oxygen in the exhaust gases and send feedback to the engine control unit (ECU) to maintain the ideal air-fuel ratio. This ensures maximum performance, fuel efficiency, and reduced emissions — essential for both road and track use.
At Design911, we supply a wide range of high-quality replacement lambda sensors specifically designed for Porsche models, including 911, Cayman, Boxster, Panamera, and Macan. Each sensor is built to manufacturer-level standards, ensuring accurate data, fast response times, and long service life even under extreme exhaust temperatures.
Whether you’re performing a maintenance service or troubleshooting an emissions issue, our lambda sensors provide reliable performance and precise air-fuel monitoring to keep your Porsche running at its best.
What Do Lambda Sensors Do?
The lambda sensor continuously measures oxygen content in the exhaust gases, allowing the ECU to adjust the fuel injection and ignition timing. This feedback loop helps the engine maintain an optimal stoichiometric mixture (14.7:1 air to fuel), which is critical for performance, economy, and emissions control.
Core Functions:
- Monitors
exhaust oxygen levels to fine-tune combustion.
- Supports
optimal air-fuel ratio for maximum efficiency.
- Ensures proper catalytic converter operation.
- Reduces
emissions and maintains environmental compliance.
- Improves throttle response and fuel economy.
Without a functioning lambda sensor, your engine can run rich or lean — leading to poor performance, excessive fuel use, and potential catalytic converter damage.
Why Do Lambda Sensors Fail?
Lambda sensors operate in one of the harshest environments of the vehicle — exposed to extreme heat, soot, and contaminants. Over time, they wear out and lose accuracy.
Common Causes of Failure Include:
- Carbon
or oil contamination on the sensor element.
- Thermal shock or excessive heat exposure.
- Wiring or connector corrosion. Silicone or fuel additive residue buildup.
- Normal sensor aging and loss of sensitivity.
When a lambda sensor fails, you may notice increased fuel
consumption, rough idle, loss of power, or a check engine light — all
indicators that replacement is needed.
Why Replace Your Lambda Sensor?
Replacing a worn or faulty lambda sensor restores proper fuel-air mixture control, protects the catalytic converter, and ensures compliance with emission standards.
Key Benefits:
- Restores fuel efficiency and power delivery. Improves engine responsiveness and idle stability.
- Reduces harmful emissions and prevents MOT failure.
- Protects expensive exhaust components like catalytic converters.
- Direct-fit compatibility for Porsche models.
- Built from high-grade materials for extended lifespan.
Replacing your lambda sensor is an easy, cost-effective way to revive performance and reliability in your Porsche’s engine system.
Highlights:
- High-quality oxygen probes and lambda sensors for Porsche.
- Ensures accurate air-fuel ratio and clean combustion.
- Compatible with Porsche 911, Cayman, Boxster, Macan, Panamera and others.
- Corrosion-resistant housings and fast-reacting elements.
- Essential for performance, emissions control, and fuel economy.
- Direct-fit design ensures easy installation and reliable connection.
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