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Lambda oxygen sensor, After catalytic converter
Genuine Porsche lambda oxygen sensor for Porsche 971.1 Panamera V6 models, positioned after the catalytic converter.
This original Porsche oxygen sensor monitors exhaust gas oxygen content downstream of the catalytic converter, helping the engine management system assess catalyst efficiency and emissions performance.
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Fits:
Porsche 971.1 Panamera V6 2.9L >> 16/06/2019
* Engine Type: CSZA, CSZB,
CSZ
Porsche 971.1 Panamera V6 3.0L 2016 - 2020
* Engine Type: CXTA, CXT
Diagram ref no 18
What This Part Does / Functions
• Measures oxygen content in the exhaust gas after the catalytic converter
• Helps the ECU monitor catalytic converter efficiency
• Supports emissions control and diagnostic monitoring
• Helps detect catalyst performance issues
• Provides downstream exhaust feedback to the engine management system
• Replaces a failed, slow, contaminated or faulty original lambda sensor
• Helps clear oxygen sensor and catalyst monitoring fault codes when the sensor is the confirmed cause
• Provides correct Genuine Porsche fitment and electrical compatibility.
Why Replace This Part?
Lambda oxygen sensors operate in a harsh exhaust environment with high temperatures, fuel vapour, oil vapour, condensation and exhaust contaminants. Over time, the sensor can become slow to respond, contaminated, electrically faulty or damaged.
A failed downstream lambda sensor can trigger engine warning lights, emissions faults, catalyst efficiency codes or inaccurate exhaust monitoring.
Replacing it with a Genuine Porsche oxygen sensor helps restore correct catalyst monitoring and OE Porsche emissions-system performance.
Common Symptoms of a Faulty Lambda Sensor
• Check engine light
• Oxygen sensor fault codes
• Catalyst efficiency fault codes
• Emissions test failure
• Rough running or irregular idle in some cases
• Increased fuel consumption in some cases
• Slow sensor response shown on diagnostics
• Damaged wiring or connector
• Sensor contamination from oil, fuel or silicone residue.
When to Replace This Par
• If diagnostic testing confirms a faulty downstream oxygen sensor
• If fault codes relate to the post-catalyst lambda sensor
• If the sensor is slow, contaminated or electrically failed
• During exhaust or catalytic converter repair where the sensor is damaged
• If the sensor wiring or connector is damaged
• When resolving emissions monitoring faults
• If the sensor cannot be removed without damage during exhaust service
• When restoring the vehicle with Genuine Porsche emissions components.
Where It Fits on the Car
This lambda sensor fits in the exhaust system after the catalytic converter. It is a downstream oxygen sensor used for catalyst monitoring rather than primary mixture control.
Correct sensor position is important. It should not be confused with the pre-catalyst / upstream lambda sensor.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A7906265D
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