Original Porsche Part Genuine Porsche part 9Y0816729E

Air conditioning refrigerant pressure line.
The Genuine Porsche 9Y0816721C air conditioning refrigerant pressure line is an OE A/C refrigerant line for selected Porsche 9YA Cayenne 3.0L non-hybrid models. It helps route refrigerant through the pressure side of the air conditioning system, supporting correct system pressure and cooling performance. Ideal for replacing a leaking, damaged or corroded A/C refrigerant line during air conditioning repair work.
Fits:
Porsche 9YA Cayenne 3.0L petrol 2018 - 2024 (PR:DU6)
 * Refrigerant R1234yf (option code: KK3)
Diagram ref no 7
Part number 9Y0816721C is a Genuine Porsche air conditioning refrigerant pressure line, also described as an A/C refrigerant discharge hose, refrigerant line or return pipe. It is designed for Porsche Cayenne 9YA 3.0L petrol models without hybrid, and is listed for vehicles using R1234yf refrigerant.
Functions
•  Transfers A/C refrigerant through the air conditioning system
•  Forms part of the pressure side of the refrigerant circuit
•  Helps maintain correct refrigerant flow between A/C components
•  Supports efficient cabin cooling performance
•  Helps maintain correct A/C system pressure when properly sealed
•  Provides a factory-correct pipe/hose shape and connection fitment
•  Replaces a leaking, damaged or corroded original refrigerant line
•  Maintains OE Porsche air conditioning system reliability and fit.
Why Replace This Part?
A/C refrigerant lines can become damaged, corroded, cracked or leak at connection points over time. If the pressure line leaks, the air conditioning system may lose refrigerant, resulting in weak cooling, warm air from the vents or complete A/C failure. Replacing the line with a Genuine Porsche OE refrigerant pressure line helps restore the correct refrigerant circuit, pressure sealing and cooling performance. The system should be checked, evacuated and recharged by a qualified A/C technician after installation.
When to Replace This Part
•   If the A/C system is leaking refrigerant from the line or hose connection
•   If the air conditioning blows warm or does not cool correctly
•   If the pipe is cracked, damaged, corroded or kinked
•   During A/C compressor, condenser, evaporator or hose repairs
•   If the system fails a pressure or leak test
•   After accident damage or front-end repair affecting A/C pipework
•   When replacing old or damaged refrigerant pipework with OE Porsche parts.
Where It Fits on the Car
This part fits in the air conditioning refrigerant circuit of the Porsche Cayenne. It is used as part of the A/C pressure/discharge line system, routing refrigerant between air conditioning components in the engine bay/front vehicle area. Exact routing and connection points can vary by engine and model specification, so the part should be matched to the vehicle VIN before fitting.

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

9Y0816721C

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Air conditioning refrigerant pressure line.
This OE Match air conditioning refrigerant pressure line is a replacement A/C pipe for Porsche 9YA Cayenne 3.0L models. It is designed to match the original-style fitment and function, helping maintain correct refrigerant flow within the vehicle’s air conditioning system.
Fits:
Porsche 9YA Cayenne 3.0L petrol 2018 - 2024 (PR:DU6)
 * Refrigerant R1234yf (option code: KK3)
Diagram ref no 7
The refrigerant pressure line carries air conditioning refrigerant between A/C system components under pressure. It helps the system circulate refrigerant correctly so the air conditioning can cool the cabin efficiently and operate as intended.
Functions
•  Carries refrigerant through the air conditioning system
•  Helps maintain correct A/C system pressure and flow
•  Supports efficient cabin cooling performance
•  Connects designated air conditioning system components
•  Helps prevent refrigerant leaks when correctly installed
•  Replaces damaged, leaking, corroded, or worn original pressure lines
•  OE Match replacement for A/C system repair and service.
Why Replace This Part?
Air conditioning refrigerant pressure lines can become damaged by corrosion, vibration, impact, age, or seal failure. A leaking or damaged pressure line can cause refrigerant loss, poor cooling, A/C system pressure faults, or complete air conditioning failure. Replacing the line helps restore correct refrigerant circulation and supports reliable climate control operation.
When to Replace This Part
•   The A/C pressure line is leaking refrigerant
•   The pipe is corroded, cracked, bent, or physically damaged
•   The air conditioning system is not cooling correctly
•   Refrigerant pressure faults are present
•   Oil or dye residue is visible around the A/C line or joints
•   The line has been damaged during engine bay or front-end repairs
•   The A/C system is being serviced, repaired, or recommissioned.
Where it fits on the car
This refrigerant pressure line fits within the air conditioning pipework system on Porsche 9YA Cayenne 3.0L models. It connects between the specified A/C system components according to the vehicle’s factory diagram and refrigerant circuit layout.

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

9Y0816721C

The product you are viewing cross references to these numbers

Refrigerant Line, Condenser.
The Porsche Refrigerant Line, Condenser is a genuine air conditioning system component designed to transport refrigerant between the condenser and other critical climate control system components. Engineered to Porsche's exact specifications for fit, pressure resistance and durability, this refrigerant line plays a vital role in maintaining efficient refrigerant circulation and ensuring optimal air conditioning performance.  
Fits:

• Porsche 9YA Cayenne S V6 2.9L Petrol (440Hp) 2018-23
• Porsche 9YA Cayenne Coupe S V6 2.9L Petrol (440Hp) 2019-23
• Porsche 9YA.2 Cayenne V6 3.0L Petrol (353Hp) 2023>>
• Porsche 9YA.2 Cayenne Coupe V6 3.0L (353Hp) 2023>>

  
Diagram Ref No 6
Manufactured from high-quality aluminium tubing and reinforced hose sections where required, the line is designed to withstand the high pressures, temperature fluctuations and vibrations encountered within modern automotive climate control systems. Precision-formed to follow the original factory routing, it provides secure, leak-free connections that help maintain system efficiency and long-term reliability.  
What This Product Does:

• Transfers refrigerant between the condenser and associated A/C system components.
• Maintains correct refrigerant flow throughout the climate control system.
• Supports efficient heat exchange and cooling performance.
• Helps maintain correct operating pressures within the refrigerant circuit.
• Contributes to consistent cabin cooling and passenger comfort.
• Provides secure, sealed connections within the air conditioning system.
• Supports reliable operation of the climate control system.
• Helps maintain overall A/C system efficiency and performance.

Symptoms Of Wear Or Failure:

• Reduced air conditioning cooling performance.
• Warm air blowing from cabin vents.
• Refrigerant leaks from pipework or connection points.
• Oily residue around A/C fittings or hose connections.
• Frequent refrigerant recharge requirements.
• Air conditioning pressure-related fault codes.
• Hissing noises caused by escaping refrigerant.
• Excessive or irregular compressor cycling.
• Climate control warning messages.
• Visible corrosion, cracking or physical damage to the line.

Why Replacement Matters:

• Condenser refrigerant lines operate under significant pressure and are continuously exposed to vibration, heat, moisture, road debris and environmental contaminants. Over time, metal sections can corrode, hose sections may deteriorate and sealing surfaces can wear, resulting in refrigerant leaks and reduced system efficiency.
• A leaking refrigerant line can cause a loss of refrigerant, reducing cooling performance and increasing strain on the air conditioning compressor. If left unresolved, low refrigerant levels can accelerate wear of expensive climate control components and may eventually lead to compressor failure or complete A/C system malfunction.
• Replacing a worn or damaged refrigerant line restores proper refrigerant circulation, maintains system pressure and ensures efficient climate control operation. A genuine Porsche replacement guarantees factory-correct fitment, reliable sealing performance and long-term durability, helping preserve the comfort, refinement and performance expected from your Porsche.

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

9Y0816741T

The product you are viewing cross references to these numbers

Refrigerant Line, Condenser.
The OE MATCH Refrigerant Line, Condenser is a air conditioning system component designed to transport refrigerant between the condenser and other critical climate control system components. This refrigerant line plays a vital role in maintaining efficient refrigerant circulation and ensuring optimal air conditioning performance.  
Fits:

• Porsche 9YA Cayenne S V6 2.9L Petrol (440Hp) 2018-23
• Porsche 9YA Cayenne Coupe S V6 2.9L Petrol (440Hp) 2019-23
• Porsche 9YA.2 Cayenne V6 3.0L Petrol (353Hp) 2023>>
• Porsche 9YA.2 Cayenne Coupe V6 3.0L (353Hp) 2023>>

  
Diagram Ref No 6
Manufactured from quality aluminium tubing and reinforced hose sections where required, the line is designed to withstand the high pressures, temperature fluctuations and vibrations encountered within modern automotive climate control systems. It provides secure, leak-free connections that help maintain system efficiency and long-term reliability.  
What This Product Does:

• Transfers refrigerant between the condenser and associated A/C system components.
• Maintains correct refrigerant flow throughout the climate control system.
• Supports efficient heat exchange and cooling performance.
• Helps maintain correct operating pressures within the refrigerant circuit.
• Contributes to consistent cabin cooling and passenger comfort.
• Provides secure, sealed connections within the air conditioning system.
• Supports reliable operation of the climate control system.
• Helps maintain overall A/C system efficiency and performance.

Symptoms Of Wear Or Failure:

• Reduced air conditioning cooling performance.
• Warm air blowing from cabin vents.
• Refrigerant leaks from pipework or connection points.
• Oily residue around A/C fittings or hose connections.
• Frequent refrigerant recharge requirements.
• Air conditioning pressure-related fault codes.
• Hissing noises caused by escaping refrigerant.
• Excessive or irregular compressor cycling.
• Climate control warning messages.
• Visible corrosion, cracking or physical damage to the line.

Why Replacement Matters:

• Condenser refrigerant lines operate under significant pressure and are continuously exposed to vibration, heat, moisture, road debris and environmental contaminants. Over time, metal sections can corrode, hose sections may deteriorate and sealing surfaces can wear, resulting in refrigerant leaks and reduced system efficiency.
• A leaking refrigerant line can cause a loss of refrigerant, reducing cooling performance and increasing strain on the air conditioning compressor. If left unresolved, low refrigerant levels can accelerate wear of expensive climate control components and may eventually lead to compressor failure or complete A/C system malfunction.
• Replacing a worn or damaged refrigerant line restores proper refrigerant circulation, maintains system pressure and ensures efficient climate control operation.

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

9Y0816741T

The product you are viewing cross references to these numbers