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Air Mass/Flow Sensors
By OE Match
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
The OE Match Air Intake Boot is a replacement flexible intake duct for the Porsche 911 Carrera 3.2L from 1984–1989.
Fits:- Porsche 911 Carrera 3.2L 1984-89
Diagram Ref No 21
Located between the engine's air flow meter and throttle body, the boot carries measured intake air towards the engine while maintaining an airtight connection between the two components.
This is an important part of the Carrera 3.2 engine-management system because the air passing through the boot has already been measured by the air flow meter. Any crack, split or loose connection in the boot can therefore allow additional air into the engine without that air being correctly accounted for by the engine-management system.
Over time, exposure to engine heat, ozone, oil vapour and repeated thermal cycling can cause the original rubber boot to harden and become brittle. Cracks can then develop, particularly around folds, hose connections and clamping areas.
Replacing a deteriorated boot helps restore a sealed intake tract, correct air metering, smooth idle quality and predictable engine response.
What This Product Does:
The Air Intake Boot provides the flexible connection between the air flow meter and throttle body.
Its main functions are to:
- Carry measured intake air towards the throttle body.
- Maintain an airtight intake path.
- Prevent unmetered air entering downstream of the air flow meter.
- Accommodate normal engine movement and vibration.
- Isolate the rigid intake components from excessive mechanical stress.
- Help maintain correct air/fuel mixture control.
- Support smooth idle and throttle response.
- Prevent dirt and contamination entering through damaged intake connections.
Symptoms Of Wear Or Failure:
Common symptoms can include:
- Rough idle.
- Unstable or hunting idle.
- High idle speed.
- Engine hesitation.
- Poor throttle response.
- Stalling at idle.
- Difficult starting.
- Reduced engine performance.
- Lean-running symptoms.
- Intake hissing noises.
- Visible cracks in the rubber.
- Splits around the folds.
- Cracks around hose connections.
- Loose fit around the air flow meter.
- Loose fit around the throttle body.
- Hardened or brittle rubber.
- Engine behaviour changing when the boot is moved during diagnosis.
Why Replacement Matters:
Replacing a cracked, hardened or leaking intake boot helps restore:
- Airtight intake sealing.
- Correct airflow measurement.
- Stable idle.
- Consistent throttle response.
- Predictable air/fuel mixture control.
- Smooth engine operation.
- Proper connection between the air flow meter and throttle body.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011035602
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Fits:
Porsche 911 3.2L 1984 - 1989
Porsche 964 1990 - 1994
Diagram ref no 1
The air mass / flow sensor measures the volume or flow of air entering the engine intake system. This information is used by the engine control system to calculate the correct fuel delivery, helping maintain smooth running, throttle response, fuel economy, and emissions performance.
Functions
• Measures incoming intake air flow
• Sends air flow information to the engine management system
• Supports correct fuel mixture calculation
• Helps maintain smooth idle and throttle response
• Supports reliable engine performance and drivability
• Replaces faulty, worn, contaminated, or failed original air flow sensors
• OE Match replacement for intake and fuel injection system repair.
Why Replace This Part?
Air mass / flow sensors can fail or become inaccurate due to age, contamination, electrical faults, worn internal components, intake leaks, or long-term use. A faulty sensor may cause rough idle, hesitation, poor throttle response, flat spots, increased fuel consumption, emissions faults, difficult starting, or poor running. Replacing the sensor helps restore accurate intake air measurement and correct engine management operation.
When to Replace This Part
• The engine has rough idle, hesitation, or poor throttle response
• Air flow sensor fault codes or mixture faults are present
• Fuel consumption has increased noticeably
• The engine runs too rich or too lean
• Starting or warm-running issues are present
• The sensor is contaminated, damaged, or electrically faulty
• The intake or fuel injection system is being serviced or repaired
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
930606123X
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928S 4.7L 1981-83
Air Mass Meter Sealing Frame
High-quality sealing frame for the air mass meter (air flow
meter), designed for a range of Porsche models including 928S US models), 911 3.2 Carrera, 944
S2 / turbo and 964.
Fits:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928S 4.7L 1981-83 (US models)
Diagram ref no 4
This sealing frame ensures a secure and airtight connection between the air mass meter and intake system, preventing unmetered air from entering the engine. Proper sealing is essential for maintaining accurate air-fuel mixture calculations and optimal engine performance.
Manufactured to OEM specifications, this component provides precise fitment and reliable sealing—ideal for both maintenance and engine restoration work.
Key Features
• Direct replacement sealing frame for air mass meter
• Ensures airtight seal within intake system
• OEM-style fit and performance
• Helps maintain correct air-fuel ratio
• Durable construction for long-term reliability
• Ideal for servicing, repair, or restoration
Function and Purpose
The sealing frame is a critical component of the intake system.
It helps to:
• Prevent unmetered air entering the engine
• Maintain accurate airflow readings
• Support optimal engine performance and efficiency
• Reduce risk of poor running or idle issues
Why Replace Your Air Mass Meter Seal
Over time, seals and frames can degrade or lose effectiveness.
Common issues include:
• Air leaks in the intake system
• Poor idle or running conditions
• Reduced engine efficiency
• Cracked or worn sealing components
Replacing the sealing frame restores proper intake system function.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92811020101
The product you are viewing cross references to these numbers
OEMatch Air Mass/Flow Sensors — Fit, Function, Confidence
Air mass and airflow sensors measure the volume and density of intake air and provide the engine control unit with data to set fuel delivery. OEMatch supplies replacement air mass/flow sensors for Porsche models, chosen for model compatibility to help restore accurate air measurement and reliable running.
Available Types
- Hot-wire mass air flow sensors
- Integrated air mass sensors with intake air temperature sensing
- Replacement modules compatible with common Porsche ECU connectors
Understanding OEMatch Air Mass/Flow Sensors
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original air mass/flow sensors. OE (Original Equipment) refers to parts matching original specifications for the air mass/flow sensors and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM air mass/flow sensors engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. Air mass sensors detect incoming airflow and density and send this information to the ECU so it can calculate the correct air–fuel mixture; accurate measurement supports smooth running across load and temperature ranges.
Benefits Include
- Restored throttle response and smoother acceleration
- Improved fuel metering for more consistent running
- Reduced risk of drivability issues linked to incorrect air readings
Why Air Mass/Flow Sensors Wear and Fail
- Contamination from dirt, oil vapour or filter residue coating sensing elements
- Electrical faults, corrosion or damaged wiring and connectors
- Heat-related degradation of sensor electronics over time
- Air leaks downstream of the sensor causing incorrect readings
The Importance of Replacing with OEMatch Air Mass/Flow Sensors
Replacing a faulty air mass sensor restores accurate airflow measurement, which helps maintain proper fuel delivery and engine response. Timely replacement can prevent secondary faults and reduce the risk of prolonged poor running that may affect other engine systems. Select parts that match connector type and mounting to ensure straightforward fitting.
Advantages
- Direct-fit replacements made to original-spec dimensions and tolerances
- Electrical and connector compatibility for common Porsche models
- A practical supply option to support maintenance and repairs
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified. If you are unsure about wiring or sensor calibration, seek professional installation.
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Alternator / Generator
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Batteries & Chargers
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Distributor
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Distributor Cap
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Rotor Arms / Point Sets
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Relays / Fuses
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Ignition Coil
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Ignition Control Units
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Ignition Lead Sets
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Injectors
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Starter Motors
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Fuel Pressure Regulator
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Idle Control Valve
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Fuel Pump
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Temperature Sensor
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Speed / Reference / Knock Sensors
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Wiring Harness / Cables
