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Porsche 911 & 912 (1965-1989) 911 1987-1989 3.2L G50 Engine Rebuild Parts Air Intake & Injection

Air Intake Boot

Air Intake Boot

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Air intake boot air flow meter. Porsche 911 1984-89 - 93011035602
2
Air intake boot air flow meter. Porsche 911 1984-89
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93011035602
Product Information
Product Information
Air intake boot air flow meter

Fits:
Porsche 911 Carrera 3.2L 1984-89

Click 'Zoom in' for large parts diagram.
Diagram ref no 21

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Related, superseded, cross reference or alternative numbers for comparison.

93011035602
93011035602

The product you are viewing cross references to these numbers
Air intake boot air flow meter. Porsche 911 1984-89 - 93011035602, 93011035601, 93011035600 - 1615300400, URO-012218
3
Air intake boot air flow meter. Porsche 911 1984-89
93011035602/1
Product Information
Product Information
Air Intake Boot Air Flow Meter.

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.
A new boot can also eliminate a difficult-to-diagnose source of false air on an ageing Carrera 3.2.



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Related, superseded, cross reference or alternative numbers for comparison.

93011035602
93011035602
93011035601
93011035600

The product you are viewing cross references to these numbers
DISPLAYING 1 to 2 (of 2 products)
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About Air Intake Boot

Air Intake Boots – Durable Airflow Connectors for Porsche Engines

Air intake boots are essential components of your Porsche’s intake system, connecting the air filter housing to the throttle body or intake manifold. These flexible connectors ensure that only clean, filtered air reaches the engine, maintaining efficient combustion and smooth performance. A high-quality air intake boot helps prevent unmetered air leaks that can lead to poor drivability, reduced performance, or increased emissions.

At Design911, we stock a comprehensive selection of genuine and high-quality air intake boots for numerous Porsche models like 911, Boxster, Cayman, Cayenne, Macan, and Panamera models. Each boot is built from durable, heat-resistant materials and designed for an exact fit to provide airtight sealing and long-lasting reliability.

What Do Air Intake Boots Do?

Air intake boots form a critical part of the engine’s air management system. They:

  • Deliver clean, filtered air from the intake system to the engine.
  • Maintain airtight sealing for accurate air-fuel ratio control.
  • Reduce turbulence to improve engine efficiency and throttle response.
  • Protect sensors like the MAF (Mass Air Flow) sensor from contaminants.

Properly functioning intake boots ensure stable idle, consistent power delivery, and efficient fuel combustion — key to maintaining Porsche’s renowned performance and responsiveness.

Why Do Air Intake Boots Fail?

Over time, air intake boots endure constant exposure to heat, pressure, and engine vibration. Common causes of failure include:

  • Cracking or splitting from heat and age.
  • Loose clamps or fittings leading to air leaks.
  • Oil contamination softening or degrading the rubber.
  • Vacuum leaks causing unmetered air to enter the system.
  • Improper installation or wear due to engine movement.

Symptoms of a failing air intake boot include rough idling, check engine light warnings, engine misfires, or loss of acceleration performance.

Why Replace a Damaged Air Intake Boot?

A cracked or leaking intake boot can allow unfiltered air into the engine, upsetting the air-fuel balance and potentially causing long-term engine damage. Replacing the boot restores correct airflow and maintains efficient engine operation.

Benefits of replacement include:

  • Restored air-fuel ratio for improved performance.
  • Reduced risk of engine misfires and stalling.
  • Enhanced throttle response and smooth acceleration.
  • Long-term reliability with manufacturer-quality construction.

All air intake boots available from Design911 are made from high-grade rubber or silicone compounds, ensuring superior resistance to heat, oil, and vibration for dependable performance in every driving condition.

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