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Air Mass/Flow Sensors
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
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.
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Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99360612401
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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.
