Lambda Oxygen Sensor (BEFORE Catalyst) Cylinder 4-6. Porsche 958 Cayenne 3.6L Petrol 2010-17  ❭  958906262E

Lambda Oxygen Sensor (BEFORE Catalyst) Cylinder 4-6. 
Maintain optimum engine performance, fuel efficiency, and emissions control with this Valeo Lambda Oxygen Sensor (Before Catalyst) – Cylinders 4–6. As an Original Equipment (OE) manufacturer, Valeo produces high-quality engine management components that meet Porsche's demanding standards for precision, durability, and reliability. Installed upstream of the catalytic converter on the cylinder bank serving cylinders 4–6, this sensor continuously monitors the oxygen content of the exhaust gases and provides accurate real-time feedback to the engine control unit (ECU), enabling precise air-fuel mixture adjustments for efficient combustion and reduced emissions.

Fits:

Diagram Ref No 29

The pre-catalyst lambda sensor is a critical component of the engine management and emissions control system. By measuring the oxygen concentration in the exhaust stream before it reaches the catalytic converter, it enables the ECU to optimise fuel injection and ignition parameters under all driving conditions. Manufactured using advanced sensing technology, premium electronic components, and a robust heat-resistant housing, this Valeo sensor is engineered to withstand extreme exhaust temperatures, vibration, and harsh operating environments, making it ideal for routine servicing, diagnostics, repairs, and restoration projects.

What This Product Does:

• Monitors oxygen levels in the exhaust gases before the catalytic converter.
• Specifically monitors the exhaust from cylinders 4–6.
• Sends accurate air-fuel ratio data to the engine control unit.
• Optimises fuel injection and combustion efficiency.
• Improves engine performance and throttle response.
• Helps reduce fuel consumption and exhaust emissions.
• Protects the catalytic converter from incorrect fuel mixtures.
• Provides an OE-quality fit for straightforward installation.

Symptoms Of Wear Or Failure:

• Engine management warning light illuminated.
• Increased fuel consumption.
• Rough or unstable idle.
• Reduced engine performance or sluggish acceleration.
• Poor throttle response.
• Increased exhaust emissions.
• Failed emissions or MOT testing.
• Diagnostic fault codes relating to the oxygen sensor or air-fuel ratio on Bank 2 (cylinders 4–6).
• Premature catalytic converter deterioration caused by incorrect fuel mixtures.

Why Replacement Matters:

• The pre-catalyst lambda oxygen sensor for cylinders 4–6 is one of the primary inputs for the engine management system, allowing the ECU to maintain the ideal air-fuel ratio for that cylinder bank. A worn or faulty sensor can cause excessive fuel consumption, poor engine performance, rough running, increased emissions, and potential catalytic converter damage due to prolonged rich or lean fuel mixtures.
• Replacing a worn or faulty sensor with this Valeo Lambda Oxygen Sensor (Before Catalyst) – Cylinders 4–6 restores accurate exhaust gas monitoring, improves fuel efficiency, enhances engine performance, reduces harmful emissions, and helps protect expensive emissions system components. Manufactured by Valeo to Original Equipment standards, this lambda oxygen sensor delivers exceptional fit, precision, durability, and long-term reliability for Porsche maintenance, repairs, and restoration projects.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

958906262E

The product you are viewing cross references to these numbers