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Air Intake Boot
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
OEMatch Air Intake Boot — Durability, Sealing, Performance
OEMatch air intake boots for Porsche models connect the air filter housing to the throttle body or intake manifold and preserve controlled airflow and sealing. Properly functioning boots help prevent unmetered air entering the engine, supporting stable idle, consistent power delivery and efficient combustion across many Porsche engine layouts.
Available Types
- Rubber bellows and corrugated inlet boots
- Silicone elbows and couplers
- Replacement inlet hoses with integrated mounting points
Understanding OEMatch Air Intake Boot
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original air intake boot.
OE (Original Equipment) refers to parts matching original specifications for the air intake boot and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM air intake boots engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Air intake boots form a flexible, heat-resistant link between the airbox and engine, sealing the pathway used by metered air. They protect sensors such as the MAF from contamination and help preserve the calibrated air-fuel mixture required for smooth idling and responsive throttle behaviour. Boots must withstand heat, oil exposure and vibration while retaining clamp locations and mounting points designed for Porsche engine bays.
Benefits Include
- Restores airtight sealing for accurate air-fuel ratio control
- Protects MAF and other intake sensors from dirt and oil
- Improves throttle response and reduces hesitation
Why Air Intake Boot Wear and Fail
- Heat and age cause cracking or hardening of rubber sections
- Oil contamination can soften and degrade the material
- Loose clamps, damaged fittings or excessive engine movement create leaks
The Importance of Replacing with OEMatch Air Intake Boot
A leaking or damaged boot allows unmetered air into the intake, upsetting the air-fuel balance and potentially triggering faults or drivability issues. Replacing a failed boot restores correct airflow, reduces the risk of misfires and helps maintain fuel efficiency and long-term engine reliability when components are installed to the correct orientation and securement.
Advantages
- Constructed from heat- and oil-resistant rubber or silicone compounds
- Designed for correct mounting positions and clamp interfaces
- Offered as an application-focused alternative to help maintain Porsche engine function
Support & Advice
These items affect engine air management and installation should be carried out by a qualified technician following model-specific procedures and torque settings. If you plan DIY work, use appropriate clamps, confirm correct routing and inspect adjacent sensors and housings for damage before final assembly.
