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Porsche 993 (911) (1994-1998) 993 (911) TURBO S 1994-97 Engine Electrical

Air Mass/Flow Sensors

Air Mass/Flow Sensors

DISPLAYING 1 to 1 (of 1 products)
Air mass / flow sensor. Porsche 993 Turbo / 993 Turbo S - 99360612401, 0280217809, 99360612400, 993606124AX
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Air mass / flow sensor. Porsche 993 Turbo / 993 Turbo S
99360612401/2
Product Information
Product Information

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
99360612401
0280217809
99360612400
993606124AX

The product you are viewing cross references to these numbers
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About Air Mass/Flow Sensors

Air Mass Sensors – Precision Airflow Measurement for Porsche Performance

Air mass sensors (also known as mass air flow sensors or MAF sensors) are critical components in your Porsche’s engine management system. They measure the exact volume and density of air entering the engine, allowing the ECU to calculate the correct air-fuel mixture for efficient combustion, performance, and emissions control.

At Design911, we offer a comprehensive range of genuine and high-quality air mass sensors for Porsche models including 911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each sensor is designed for precision accuracy, responsive measurement, and long-term reliability — ensuring smooth power delivery, optimal fuel economy, and consistent engine performance.

What Do Air Mass Sensors Do?

The air mass sensor monitors the flow of incoming air to the engine and sends data to the vehicle’s ECU (Engine Control Unit). Its main functions include:

  • Measuring air intake to calculate the optimal air-fuel ratio.
  • Ensuring efficient combustion for performance and emissions compliance.
  • Supporting fuel economy by adjusting fuel delivery based on driving conditions.
  • Maintaining smooth engine operation under all loads and temperatures.

A properly functioning MAF sensor ensures your Porsche delivers the responsiveness, efficiency, and precision it was engineered for.

Why Do Air Mass Sensors Fail?

Air mass sensors are delicate electronic components and can degrade over time due to contamination, wear, or electrical issues. Common causes of failure include:

  • Contamination from dirt, oil vapour, or air filter residue coating the sensor wire.
  • Electrical faults or corrosion in the wiring harness or connectors.
  • Sensor burnout due to prolonged high temperatures.
  • Air leaks downstream of the sensor causing incorrect readings.
  • Use of low-quality air filters or poor servicing introducing debris into the intake.

Symptoms of a failing air mass sensor include rough idling, reduced power, poor acceleration, increased fuel consumption, or an illuminated engine warning light.

Why Replace a Faulty Air Mass Sensor?

A faulty or inaccurate MAF sensor can severely impact your Porsche’s performance, leading to poor drivability, high fuel use, and potential damage to other engine components. Replacing it restores proper airflow measurement and engine efficiency.

Benefits of replacement include:

  • Restored throttle response and smooth power delivery.
  • Optimised fuel economy and emissions control.
  • Prevention of stalling, hesitation, or misfires.
  • Reliable, manufacturer-quality sensor performance and lifespan.

All air mass sensors supplied are made to meet or exceed exacting engineering standards, using advanced materials and sensor technology for precision airflow measurement and long-lasting durability.

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