Air mass/flow sensor. This part number is no longer available. Genuine Porsche part 99360612301

Lambda oxygen sensor



Fits:
Porsche 993 Turbo (AFTER catalytic converter)

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Related, superseded, cross reference or alternative numbers for comparison.

99360612701

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Lambda oxygen sensor.



Fits:
Porsche 996 2000-02 (AFTER catalytic converter)
*Cars with M661 stricter emission control concept

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.

99360611801

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Lambda oxygen sensor



Fits:
Porsche 993 C2 / C4 1994-97 (Not turbo)

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.

99360612601

The product you are viewing cross references to these numbers

Lambda oxygen sensor



Fits:
Porsche 993 Turbo (BEFORE catalytic converter)
Porsche 996 C2/4 >>01 (BEFORE catalytic converter)
Porsche 996 GT3 >>03 (BEFORE catalytic converter)

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.

99360612801

The product you are viewing cross references to these numbers

Air mass / flow sensor.



Fits:
Porsche 993 Turbo

A mass airflow sensor is used to determine the mass of air entering an electronically fuel-injected engine. The air mass information is necessary for the engine control unit (ECU) to calculate and deliver the correct fuel mass to the engine. Air changes its density as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the ambient temperature and altitude, and this is an ideal application for a mass sensor.

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

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99360612401

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Air mass / flow sensors
This sensor measures the amount of air entering the engine’s intake system and sends this data to the engine control unit (ECU) so the correct amount of fuel can be injected. The OE Match sensor is designed to replace the factory-installed component used on Porsche 993 engines. It uses modern sensing technology to accurately detect airflow and transmit the information to the engine control system. This part is commonly replaced during engine troubleshooting or maintenance when airflow readings become inaccurate due to contamination or internal sensor wear.

Fits:
Porsche 993 C2 / C4 1994 - 1998

The sensor monitors the amount and density of air entering the engine and sends this information to the ECU. The ECU uses the signal to calculate the optimal air-fuel mixture required for efficient combustion, engine performance and fuel economy.

If the sensor fails or sends incorrect data, the engine may run too rich or too lean, leading to poor performance or increased fuel consumption.

Function
•  Airflow Measurement: Detects the mass of air entering the engine intake
•  Fuel Control: Helps the ECU determine the correct fuel injection quantity
•  Engine Efficiency: Supports optimal combustion and fuel economy
•  Performance Stability: Maintains smooth engine operation and throttle response

MAF sensors are exposed to intake airflow, contaminants and heat, which can gradually affect sensor accuracy. When the sensor begins to fail, the engine control unit may receive incorrect airflow data, causing rough running, poor fuel economy or reduced engine performance. Replacing the sensor restores correct air-fuel mixture control and ensures the engine operates smoothly.

Consider replacing the air mass flow sensor if you notice:
•   Check engine light related to airflow or fuel mixture
•   Rough idle or engine hesitation
•   Poor fuel economy
•   Engine running excessively rich or lean

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99360612301

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Fuel injector.
6 per car. Price is for each.

Fits:
Porsche 993 C2 / C4 1994 - 1998
Porsche 993 RS 1995 - 1996 M64.20

Bosch Ref number: 0280150786

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99360612001

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Fuel injector.
6 per car. Price is for each.



Fits:
Porsche 993 3.6L Turbo 1995-98

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Idle control valve. 



Fits:
Porsche 993 C2 / C4 / RS 1994-98
Porsche 993 Turbo 1994-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 11.

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