Air Mass/Flow Sensors

OE Match air mass / flow sensor for Porsche 993 Turbo and Turbo S applications. It measures incoming air mass and provides a signal used by the engine management system to calculate fuel delivery.

Fits

• Porsche 993 Turbo 1994–96
• Porsche 993 Turbo S 1994–97
  
  

Check fitment for your specific vehicle (model, year, engine) before ordering.

Diagram ref no: 6

What This Product Does

The mass airflow sensor supplies intake-air information to the engine control unit. This information helps the system determine how much fuel to inject as engine demand and air conditions change. Air density varies with temperature, atmospheric pressure and altitude, making air mass measurement relevant to fuelling calculations.

Functions

• Measures air mass passing through the intake.
• Provides airflow information for engine-management calculations.
• Supports adjustment of fuel delivery as operating conditions change.
  
  

Technical Details

• Brand: OE Match.
• Component identification: mass air flow meter, also called a MAF sensor.
• Internal diagram part reference: 993606124AX.
• Supplied Porsche references: 99360612401 and 99360612400.
• Assembly context: turbocharging 993 TURBO 1994-98. The specific applications above remain the fitment guide.
  
  

Symptoms of Fault

• Hesitation or uneven response to throttle input.
• Unsteady idle or engine stalling.
• Reduced engine output.
• Increased fuel consumption.
• Airflow-signal plausibility faults.
• Unexpected or inconsistent airflow values during live-data checks.
  
  

These symptoms are not unique to the sensor. Intake leaks, damaged wiring and poor connector contact can produce similar running problems, so diagnosis should establish the cause before replacement.

Why Replacement Matters

An inaccurate airflow signal can cause the engine control unit to calculate unsuitable fuel quantities. Replacing a confirmed faulty sensor addresses the measurement fault rather than unrelated ignition or intake problems. OE Match focuses on Porsche replacement applications, with reference matching and specification checks forming part of its component-selection process.

FAQs

Does an airflow fault code prove the sensor has failed?
No. Check the electrical connections, wiring and intake system, then assess the signal before condemning the sensor.

Could an intake leak cause similar symptoms?
Yes. Air entering without being measured can affect fuelling and resemble a sensor fault.

Will cleaning resolve the problem?
Light contamination may be relevant, but cleaning cannot correct every electronic or calibration fault.

What should be checked before choosing a replacement?
Compare the original references, connector and vehicle application. Similar appearance alone does not establish compatibility.

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

99360612401

The product you are viewing cross references to these numbers

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

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

99360612301

The product you are viewing cross references to these numbers

Reconditioned Air Mass / Flow Sensor.

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.

Fits:
Porsche 993 C2 / C4 / Carrera RS 1995-98

This item is sold on an exchange basis.

PLEASE NOTE:

• The surcharge for this reconditioned part will be refunded when the exchange unit is received and approved by us and the relevant manufacturer.
• Please note, surcharge refunds often take an average of 6 to 8 weeks to be approved by the manufacturer.
• Acceptance of the exchange part is at the manufacturer's discretion, based on the part being fit for reconditioning.
• All surcharges and exchanges are subject to our terms and conditions.

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

993606123AX

The product you are viewing cross references to these numbers
PLEASE NOTE:

• The surcharge for this reconditioned part will be refunded when the exchange unit is received and approved by us and the relevant manufacturer.
• Please note, surcharge refunds often take an average of 6 to 8 weeks to be approved by the manufacturer.
• Acceptance of the exchange part is at the manufacturer's discretion, based on the part being fit for reconditioning.
• All surcharges and exchanges are subject to our terms and conditions.