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Porsche > 911 & 912 (1965-1989) > 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F) > Engine Rebuild Parts > Air Intake & Injection >

Switches / Regulators / Sensors

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Intake Flapper Valve Lever. Porsche 911 72-75 - 91110806101
3
Intake Flapper Valve Lever. Porsche 911 72-75
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91110806101
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Product Information
Intake Flapper Valve Lever. Controls the intake pre-heater valve.

porsche

Fits:
Porsche 911 1972-75

Click 'Zoom in' for large parts diagram.
Diagram ref no 17

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91110806101

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Microswitch for intake manifold. Porsche 911 with MFI Mechanical Fuel Injection - 90161310600
3
Microswitch for intake manifold. Porsche 911 with MFI Mechanical Fuel Injection
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90161310600
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Microswitch for intake manifold.
Genuine Porsche Original Equipment (OE) intake manifold microswitch, designed specifically for Porsche 911 models equipped with Mechanical Fuel Injection (MFI). This factory-engineered switch provides a critical electrical signal within the MFI system, supporting correct fuel metering and drivability. Located on the intake manifold, below the throttle linkage.

Fits:
Porsche 911 1969 - 1973
with MFI Mechanical Fuel Injection

Diagram ref no 24

The microswitch detects mechanical movement or position within the intake manifold or throttle linkage and provides an electrical contact signal to the MFI system, helping regulate fuel delivery and idle characteristics.

With age and use, microswitches can suffer from contact wear, internal corrosion, or inconsistent actuation, leading to poor idle quality, hesitation, or incorrect fuel delivery on MFI engines. Replacing a faulty switch with a Genuine Porsche OE unit restores factory-correct switching behaviour and helps preserve the precise mechanical fuel injection characteristics that define classic MFI-equipped 911s.

When to replace:
•  Unstable or inconsistent idle on MFI engines
•  Hesitation during throttle transitions
•  Intermittent electrical contact or failed switch testing
•  During MFI system overhaul or intake servicing
•  As part of a factory-correct restoration

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

90161310600
90161310600

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Microswitch for intake manifold. Porsche 911 with MFI Mechanical Fuel Injection - 90161310600
3
Microswitch for intake manifold. Porsche 911 with MFI Mechanical Fuel Injection
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90161310600/1
Product Information
Product Information
Microswitch for intake manifold. 
OE Match intake manifold microswitch engineered as a direct-fit replacement for the original Porsche factory microswitch used on Porsche 911 engines equipped with MFI (Mechanical Fuel Injection). Located on the intake manifold, below the throttle linkage. It detects specific intake airflow/position conditions and feeds that signal to the engine management/mechanical fuel injection system.

Fits:
Porsche 911 1969 - 1973
with MFI Mechanical Fuel Injection

Diagram ref no 24

This replacement is designed to operate reliably under high heat and vibration typical of the intake manifold area. It installs directly into the intake manifold or associated linkage mounting point using factory mounting hardware - no modification needed.

This OE Match microswitch is ideal when the original microswitch has worn, failed, or exhibits intermittent electrical contact, helping restore consistent fuel metering and smooth engine response.

The intake manifold microswitch detects the position or movement of a mechanical linkage (such as throttle or airflow sensor plate) and sends a contact signal to the engine’s mechanical fuel injection system. This information helps the MFI system manage fuel delivery and idle characteristics accurately.

Microswitches in mechanical fuel injection systems wear over time, leading to poor electrical contact, intermittent signals, or failed switch actuation. A compromised switch can result in rough idle, hesitation, inconsistent throttle response, or fuel metering issues. Installing an OE Match microswitch restores the correct mechanical-to-electrical signal interface, helping maintain MFI performance and drivability.

When to replace:
• Engine exhibits rough or unstable idle with MFI system
• Throttle response feels inconsistent
• Original switch shows poor contact or intermittent operation
• During intake manifold service or MFI system overhaul
• Preventive maintenance on high-mile MFI cars

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90161310600
90161310600

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Regulator Housing. Porsche 911 72-77 - 91110801500
4
Regulator Housing. Porsche 911 72-77
Special Order item
91110801500
Product Information
Product Information
Regulator Housing.

porsche

Fits:
Porsche 911 1972-73
Porsche 911/83 1974-77

Click 'Zoom in' for large parts diagram.
Diagram ref no 16

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91110801500
91110801500

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DISPLAYING 1 to 4 (of 4 products)
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About Switches / Regulators / Sensors

Air Intake Switches, Regulators & Sensors – Precision Control for Porsche Engine Efficiency

Air intake switches, regulators, and sensors are critical components in your Porsche’s engine management system, designed to monitor, control, and optimise the airflow entering the engine. These parts ensure precise fuel-air mixture regulation, allowing for efficient combustion, smooth performance, and compliance with modern emissions standards.

At Design911, we offer a complete range of genuine and high-quality air intake sensors, pressure regulators, and switches for numerous Porsche models, including 911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each component is engineered to deliver accuracy, reliability, and seamless integration with your vehicle’s electronic control systems.

What Do Air Intake Switches, Regulators & Sensors Do?

These components are essential for maintaining the correct balance between air and fuel delivery. They perform several vital functions, including:

  • Monitoring airflow and pressure to regulate combustion efficiency.
  • Sending data to the ECU (engine control unit) for precise timing and fueling adjustments.
  • Ensuring smooth throttle response and stable idling.
  • Maintaining emission control by optimising air-fuel ratios under all conditions.

Together, they help your Porsche achieve maximum performance, fuel economy, and emissions compliance — whether under everyday driving or high-performance conditions.

Why Do Air Intake Switches, Regulators & Sensors Fail?

Over time, these components can degrade due to heat, vibration, or contamination. Common causes of failure include:

  • Carbon or oil buildup on sensor tips affecting readings.
  • Electrical failures from wiring corrosion or connector damage.
  • Mechanical wear in regulators or valves.
  • Vacuum leaks causing inaccurate air pressure readings.
  • Exposure to moisture leading to corrosion or short circuits.

Symptoms of failure include erratic idling, reduced power, poor fuel economy, engine misfires, or a check engine light triggered by faulty airflow data.

Why Replace Faulty Air Intake Components?

A malfunctioning air intake sensor or regulator can lead to incorrect air-fuel mixtures, reduced performance, and increased emissions. Replacing these components ensures your Porsche runs smoothly, efficiently, and safely.

Benefits of replacement include:

  • Restored power and throttle responsiveness.
  • Improved combustion efficiency and reduced emissions.
  • Reliable ECU communication and consistent performance.
  • Long-term durability with manufacturer-quality precision.

Our selection of intake regulators, pressure sensors, and switches are built with advanced electronics, corrosion-resistant materials, and precision calibration, ensuring reliable performance in all Porsche models.

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