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Lambda oxygen sensor BEFORE cat. Porsche 981 Boxster / 981C Cayman ❭ 9A160618303
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
The Oxygen Sensor (also known as Lambda Sensor) is located in the exhaust manifold and measures the amount of unburned oxygen in your engine's exhaust. Based on the amount of oxygen, it sends a signal to your engine computer which then adjusts the air/fuel mixture for optimum engine performance and emission control.
Fits:
Porsche 981 Boxster 2012-16 (in front of catalytic converter)
Porsche 981C Cayman 2014-16 (in front of catalytic converter)
Failure Symptoms:
Excessive fuel consumption, a faulty oxygen sensor can waste 30% of your fuel.
Driveability problems, such as engine surging or hesitation.
High hydrocarbon emissions, failing an emissions inspection.
The engine warning light may be on or service flag displayed.
The ecu/computer stores a mixture-related fault code.
When the oxygen sensor has stopped functioning completely, the catalytic converter may overheat and fail
Maintenance/Service:
Test and/or replace every 30,000 miles.
Perform periodic emission checks.
Watch for service light.
Vehicle manufacturers recommend periodic inspection and replacement of oxygen sensor.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A160618303
The product you are viewing cross references to these numbers
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18

Fits:
Porsche 95B Macan 3.0L / 3.6L 2014-18
Click 'Zoom in' for large parts diagram.
Diagram ref no 29 (LEFT) / 28 (RIGHT)
Function:
The Oxygen Sensor (also known as Lambda Sensor) is located in the exhaust manifold and measures the amount of unburned oxygen in your engine's exhaust. Based on the amount of oxygen, it sends a signal to your engine computer which then adjusts the air/fuel mixture for optimum engine performance and emission control.
Failure Symptoms:
Excessive fuel consumption, a faulty oxygen sensor can waste 30% of your fuel.
Driveability problems, such as engine surging or hesitation.
High hydrocarbon emissions, failing an emissions inspection.
The engine warning light may be on or service flag displayed.
The ecu/computer stores a mixture-related fault code.
When the oxygen sensor has stopped functioning completely, the catalytic converter may overheat and fail
Maintenance/Service:
Test and/or replace every 30,000 miles.
Perform periodic emission checks.
Watch for service light.
Vehicle manufacturers recommend periodic inspection and replacement of oxygen sensor.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95B906203
The product you are viewing cross references to these numbers
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
The LEFT Lambda Sensor, After Catalytic Converter is an OEM-quality emissions control sensor designed to monitor oxygen levels in the exhaust gases after they have passed through the catalytic converter on the left-hand exhaust bank. Also known as a post-catalyst oxygen sensor, it provides critical feedback to the engine control unit (ECU) to evaluate catalytic converter efficiency and ensure the emissions system is functioning correctly.
Fits:
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
Diagram Ref No 31
Positioned downstream of the catalytic converter, this sensor continuously measures residual oxygen content in the exhaust stream, allowing the ECU to monitor catalyst performance, detect faults, and maintain compliance with emissions regulations. Manufactured to OEM specifications, it delivers accurate readings, reliable operation, and long service life.
What This Product Does:
- Monitors oxygen levels in exhaust gases after the catalytic converter
- Measures catalytic converter efficiency on the left exhaust bank
- Provides real-time emissions data to the engine control unit (ECU)
- Supports emissions control system monitoring and diagnostics
- Helps ensure compliance with environmental regulations
- Assists in identifying catalytic converter and exhaust system faults
Symptoms Of Wear Or Failure:
- Check engine light illumination
- Catalytic converter efficiency fault codes
- Failed emissions or MOT tests
- Oxygen sensor-related diagnostic trouble codes (DTCs)
- Increased exhaust emissions
- Engine management warning messages
- Incorrect catalytic converter monitoring data
- Potential reduction in fuel economy in some applications
Why Replacement Matters:
- Restores precise exhaust oxygen monitoring
- Ensures accurate catalytic converter efficiency assessment
- Helps maintain emissions compliance and MOT readiness
- Prevents persistent engine management warning lights
- Supports proper operation of the emissions control system
- Allows early detection of catalyst and exhaust-related issues
- Reduces harmful exhaust emissions
- Maintains long-term reliability and performance of the engine management system
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95B906203E
The product you are viewing cross references to these numbers
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
The BOSCH LEFT Lambda Sensor, After Catalytic Converter is an emissions control sensor designed to monitor oxygen levels in the exhaust gases after they have passed through the catalytic converter on the left-hand exhaust bank. Also known as a post-catalyst oxygen sensor, it provides critical feedback to the engine control unit (ECU) to evaluate catalytic converter efficiency and ensure the emissions system is functioning correctly.
Fits:
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
Diagram Ref No 31
Positioned downstream of the catalytic converter, this BOSCH sensor continuously measures residual oxygen content in the exhaust stream, allowing the ECU to monitor catalyst performance, detect faults, and maintain compliance with emissions regulations. It delivers accurate readings, reliable operation, and long service life.
What This Product Does:
- Monitors oxygen levels in exhaust gases after the catalytic converter
- Measures catalytic converter efficiency on the left exhaust bank
- Provides real-time emissions data to the engine control unit (ECU)
- Supports emissions control system monitoring and diagnostics
- Helps ensure compliance with environmental regulations
- Assists in identifying catalytic converter and exhaust system faults
Symptoms Of Wear Or Failure:
- Check engine light illumination
- Catalytic converter efficiency fault codes
- Failed emissions or MOT tests
- Oxygen sensor-related diagnostic trouble codes (DTCs)
- Increased exhaust emissions
- Engine management warning messages
- Incorrect catalytic converter monitoring data
- Potential reduction in fuel economy in some applications
Why Replacement Matters:
- Restores precise exhaust oxygen monitoring
- Ensures accurate catalytic converter efficiency assessment
- Helps maintain emissions compliance and MOT readiness
- Prevents persistent engine management warning lights
- Supports proper operation of the emissions control system
- Allows early detection of catalyst and exhaust-related issues
- Reduces harmful exhaust emissions
- Maintains long-term reliability and performance of the engine management system
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95B906203E
The product you are viewing cross references to these numbers
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