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Air con condensers & desiccators

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99970743941/1
Product Information
Product Information
O-Ring for Radiator Air Conditioning (Air Con) and pipe,  23.8 x 2.4 mm
An OE Match O-ring seal designed for the air conditioning (A/C) system, used to create a leak-proof connection between the A/C radiator (condenser) and associated refrigerant pipes.
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Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 981 Boxster 2012 - 2016
Porsche 982 Boxster 2017>>
Porsche 987C.1 Cayman 2006 - 2008
Porsche 981C Cayman 2014 - 2016
Porsche 982C Cayman 2017>>
Porsche 996 1998 - 2005
Porsche 997.1 2005 - 2008
Porsche 997.2 2009 - 2012
Porsche 991.1 2012 - 2016
Porsche 991.2 2017 - 2019

Diagram ref no 17

This OE Match O-Ring Seal for Air Conditioning Systems is a precision-engineered sealing component developed to meet original Porsche specifications for fit, durability, and performance. This O-ring is used within the A/C system, specifically at the connections between the air conditioning condenser (radiator), dryer, and refrigerant lines, ensuring a secure and leak-free seal.

Despite its small size, this component plays a crucial role in maintaining the integrity of the A/C system. It prevents refrigerant gas from escaping and protects the system from air and moisture ingress, both of which can negatively affect cooling performance and system reliability.

Manufactured from high-quality, refrigerant- and temperature-resistant rubber, this O-ring is designed to withstand pressure, thermal cycling, and exposure to A/C gases and oils. It is typically required when replacing A/C components such as condensers, pipes, or dryers, and should always be renewed during system servicing.

With approximate dimensions of 23.8 x 2.4 mm, this OE Match O-ring is a direct replacement for original Porsche part numbers and ensures proper sealing performance across a wide range of models.

This O-ring creates a tight seal within the air conditioning system, preventing refrigerant leaks and ensuring efficient cooling performance.

Function
•  Seals A/C condenser and refrigerant line connections
•  Prevents refrigerant gas leaks
•  Protects against moisture and air ingress
•  Maintains system pressure and cooling efficiency
•  Ensures reliable long-term sealing under heat and pressure

O-rings in A/C systems degrade over time due to exposure to refrigerant, oil, and temperature fluctuations. A worn or hardened seal can lead to refrigerant leaks, reduced cooling performance, and potential system damage.

Replacing O-rings during servicing ensures proper sealing, maintains system efficiency, and prevents costly repairs caused by refrigerant loss or contamination.

When to replace
  During A/C condenser, pipe, or dryer replacement
  Visible signs of refrigerant leakage
  O-ring appears flattened, brittle, or cracked
  Loss of A/C cooling performance
  Preventative replacement during air conditioning service

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

99970743941
99970738240
99970743941

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About Air con condensers & desiccators

Porsche Air Conditioning Condensers & Desiccators | Efficient Cooling Performance & Climate Control Reliability

The air conditioning condenser and desiccator are essential components of your Porsche’s climate control system. The condenser cools and condenses refrigerant gas into liquid form, while the desiccator (or receiver-dryer) removes moisture and contaminants — ensuring efficient cooling and long-term A/C performance.

At Design911, we supply precision-engineered A/C condensers and desiccators designed to meet or exceed original performance standards. Built with high-efficiency cooling fins and corrosion-resistant materials, these components ensure dependable operation, consistent cabin comfort, and reliable refrigerant flow in all driving conditions.

Whether you’re repairing a leaking condenser or restoring a complete air conditioning system, our Porsche condensers and desiccators deliver the performance, durability, and efficiency expected from premium climate-control components.

What Do Air Conditioning Condensers & Desiccators Do?

Together, these components regulate temperature and protect the A/C system from moisture and contaminants.

Core Functions:

  • Condenser: Converts high-pressure refrigerant gas into liquid by dissipating heat.
  • Desiccator (Receiver-Dryer): Filters refrigerant and removes moisture to prevent internal corrosion or ice formation.
  • Maintains optimal refrigerant pressure and temperature balance.
  • Ensures cold, efficient air output inside the cabin. Protects the compressor and A/C valves from contamination damage.

Without proper cooling and moisture control, the air conditioning system can lose efficiency, leading to poor cooling, corrosion, or compressor failure.

Why Do Condensers & Desiccators Fail or Degrade?

Constant exposure to heat, vibration, and road debris makes condensers and desiccators prone to wear and corrosion. Over time, they can lose effectiveness or develop leaks.

Common Causes of Failure Include:

  • Physical damage from road debris or stone impact.
  • Corrosion from moisture or road salt.
  • Clogged fins or tubes reducing airflow and cooling efficiency.
  • Moisture saturation in the desiccator leading to internal freezing.
  • Age-related wear causing refrigerant leaks or reduced pressure.

When these parts fail, symptoms include reduced cooling performance, A/C warning lights, foggy windows, or compressor noise — clear signs that replacement is required.

Why Replace Your Porsche A/C Condenser & Desiccator?

Replacing worn or leaking A/C components restores efficient cooling, improves air quality, and protects the compressor from costly damage. Upgraded units provide enhanced thermal transfer and durability for consistent year-round comfort.

Key Benefits:

  • Restores full air conditioning performance and reliability.
  • Prevents refrigerant leaks and system contamination.
  • Protects compressor and valves from moisture-related wear.
  • Improves heat dissipation and cabin cooling efficiency.
  • Precision-fit replacements for Porsche 911, Cayman, Boxster, Panamera, Macan, and more.
  • Ideal for system servicing, rebuilds, and preventative maintenance.

It’s recommended to replace the desiccator whenever the A/C system is opened or recharged to maintain long-term system protection.

Highlights

  • Premium Porsche A/C condensers and desiccators.
  • High-efficiency aluminium cores for superior cooling.
  • Corrosion-resistant coatings for long service life.
  • Filters moisture and debris for compressor protection.
  • Direct-fit designs for Porsche road and performance models.
  • Essential for restoring optimal air conditioning performance.       

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