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Porsche > Panamera 971 MK2 (2021-2023) > 971.2 Panamera GTS 4.0L V8 2021-23 > Engine Cooling > Coolant Hoses and Pipes >

Engine Block Hoses

Engine Block Hoses

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DISPLAYING 1 to 5 (of 5 products)
Breather Line For Coolant Expansion Tank. Porsche 971.1 / 971.2 / 976 Panamera 2017>> - 9A712244700
2
Breather Line For Coolant Expansion Tank. Porsche 971.1 / 971.2 / 976 Panamera 2017>>
Special Order item
9A712244700
Product Information
Product Information
Breather Line For Coolant Expansion Tank.
The Breather Line for Coolant Expansion Tank is a genuine Porsche OEM cooling system hose designed to connect the coolant expansion tank to the engine’s cooling circuit. This breather line allows the system to manage air and pressure changes while routing overflow coolant within the closed-loop cooling system. By supporting proper ventilation and coolant return flow, it helps maintain stable engine operating temperatures and reliable cooling performance. Manufactured to Porsche specifications, it ensures precise fitment, durability, and resistance to heat and coolant exposure for Porsche Panamera models.

Fits:
  • Porsche 971.1 Panamera V6 3.0L 2WD (330 Hp) 2017-20
  • Porsche 971.1 Panamera 4 V6 3.0L 4WD (330 Hp) 2017-20
  • Porsche 971.1 Panamera 4 V6 3.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera 4 3.0L Turbocharged V6 Sport Turismo 2017-20
  • Porsche 971.1 Panamera 4S V6 3.0L 4WD (440 Hp) 2017-20
  • Porsche 971.1 Panamera 4S V6 3.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera 4S 2.9L Twin-Turbo V6 Sport Turismo 2017-20
  • Porsche 971.1 Panamera 4S Diesel V8 4.0L 4WD (422 Hp) 2017-18
  • Porsche 971.1 Panamera 4S Diesel 4.0L Twin-Turbo V8 Sport Turismo 2017-18
  • Porsche 971.1 Panamera 4 E-Hybrid V6 2.9L 4WD 2017-20
  • Porsche 971.1 Panamera 4 E-Hybrid V6 2.9L 4WD Executive 2017-20
  • Porsche 971.1 Panamera 4 E-Hybrid 2.9L Twin-Turbo V6 Sport Turismo 2017-20
  • Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
  • Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
  • Porsche 971.1 Panamera Turbo S E-Hybrid V8 4.0L 4WD 2017-20
  • Porsche 971.1 Panamera Turbo S E-Hybrid V8 4.0L 4WD Executive 2017-20
  • Porsche 971.2 Panamera 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 E-Hybrid 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 E-Hybrid Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S E-Hybrid 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S E-Hybrid Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera GTS 4.0L V8 2021-23
  • Porsche 971.2 Panamera GTS Sport Turismo 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S Sport Turismo 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S E-Hybrid 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S E-Hybrid Sport Turismo 4.0L V8 2021-23
  • Porsche 976 Panamera V6 2.9L 2023>>
  • Porsche 976 Panamera 4 V6 2.9L 2023>>
  • Porsche 976 Panamera 4 E-Hybrid V6 2.9L 2023>>
  • Porsche 976 Panamera 4S E-Hybrid V6 2.9L 2023>>  

Diagram Ref No 8

What This Product Does:

  • Vents trapped air and vapours from the cooling system into the expansion tank.
  • Routes overflow coolant between the reservoir and the cooling circuit as temperatures rise and fall.
  • Helps maintain proper system pressure balance, preventing over-pressurisation.
  • Supports stable coolant circulation by reducing air pockets within the cooling loop.

Symptoms Of Wear Or Failure:
  • Cracks or loose connections can cause coolant seepage around the reservoir area.
  • A leaking breather line can lead to gradual coolant loss, requiring frequent top-ups.
  • If the hose cannot vent properly, the system may experience excess pressure or improper pressure regulation.
  • Low coolant or temperature warnings may appear if coolant loss occurs.
  • A coolant odor in the engine bay is a common sign of leakage from the vent line.
  • Common signs include cracking or splitting, hardened or brittle rubber, swollen sections, degraded connectors or fittings, coolant residue buildup.
  • Air entering the system or coolant loss can reduce cooling efficiency.

Why Replacement Matters:
  • Prevents coolant leaks that can lead to low coolant levels and reduced cooling efficiency.
  • Maintains correct pressure regulation, allowing the cooling system to expand and contract safely as temperatures change.
  • Helps avoid engine overheating, since coolant loss or trapped air can disrupt circulation.
  • Prevents air pockets in the cooling system, which can reduce heat transfer efficiency.
  • Protects surrounding components, as leaking coolant can damage sensors, wiring, and nearby engine parts.



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

9A712244700
9A712244700

The product you are viewing cross references to these numbers
Breather Line For Coolant Expansion Tank. Porsche 971.1 / 971.2 / 976 Panamera 2017>> - 9A712244700
2
Breather Line For Coolant Expansion Tank. Porsche 971.1 / 971.2 / 976 Panamera 2017>>
9A712244700/1
Product Information
Product Information
Breather Line For Coolant Expansion Tank.
The Breather Line for Coolant Expansion Tank is a OE MATCH cooling system hose designed to connect the coolant expansion tank to the engine’s cooling circuit. This breather line allows the system to manage air and pressure changes while routing overflow coolant within the closed-loop cooling system. By supporting proper ventilation and coolant return flow, it helps maintain stable engine operating temperatures and reliable cooling performance. It ensures precise fitment, durability, and resistance to heat and coolant exposure for Porsche Panamera models.

Fits:
  • Porsche 971.1 Panamera V6 3.0L 2WD (330 Hp) 2017-20
  • Porsche 971.1 Panamera 4 V6 3.0L 4WD (330 Hp) 2017-20
  • Porsche 971.1 Panamera 4 V6 3.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera 4 3.0L Turbocharged V6 Sport Turismo 2017-20
  • Porsche 971.1 Panamera 4S V6 3.0L 4WD (440 Hp) 2017-20
  • Porsche 971.1 Panamera 4S V6 3.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera 4S 2.9L Twin-Turbo V6 Sport Turismo 2017-20
  • Porsche 971.1 Panamera 4S Diesel V8 4.0L 4WD (422 Hp) 2017-18
  • Porsche 971.1 Panamera 4S Diesel 4.0L Twin-Turbo V8 Sport Turismo 2017-18
  • Porsche 971.1 Panamera 4 E-Hybrid V6 2.9L 4WD 2017-20
  • Porsche 971.1 Panamera 4 E-Hybrid V6 2.9L 4WD Executive 2017-20
  • Porsche 971.1 Panamera 4 E-Hybrid 2.9L Twin-Turbo V6 Sport Turismo 2017-20
  • Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
  • Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
  • Porsche 971.1 Panamera Turbo S E-Hybrid V8 4.0L 4WD 2017-20
  • Porsche 971.1 Panamera Turbo S E-Hybrid V8 4.0L 4WD Executive 2017-20
  • Porsche 971.2 Panamera 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 E-Hybrid 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 E-Hybrid Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S E-Hybrid 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S E-Hybrid Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera GTS 4.0L V8 2021-23
  • Porsche 971.2 Panamera GTS Sport Turismo 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S Sport Turismo 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S E-Hybrid 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S E-Hybrid Sport Turismo 4.0L V8 2021-23
  • Porsche 976 Panamera V6 2.9L 2023>>
  • Porsche 976 Panamera 4 V6 2.9L 2023>>
  • Porsche 976 Panamera 4 E-Hybrid V6 2.9L 2023>>
  • Porsche 976 Panamera 4S E-Hybrid V6 2.9L 2023>>  

Diagram Ref No 8

What This Product Does:

  • Vents trapped air and vapours from the cooling system into the expansion tank.
  • Routes overflow coolant between the reservoir and the cooling circuit as temperatures rise and fall.
  • Helps maintain proper system pressure balance, preventing over-pressurisation.
  • Supports stable coolant circulation by reducing air pockets within the cooling loop.

Symptoms Of Wear Or Failure:
  • Cracks or loose connections can cause coolant seepage around the reservoir area.
  • A leaking breather line can lead to gradual coolant loss, requiring frequent top-ups.
  • If the hose cannot vent properly, the system may experience excess pressure or improper pressure regulation.
  • Low coolant or temperature warnings may appear if coolant loss occurs.
  • A coolant odor in the engine bay is a common sign of leakage from the vent line.
  • Common signs include cracking or splitting, hardened or brittle rubber, swollen sections, degraded connectors or fittings, coolant residue buildup.
  • Air entering the system or coolant loss can reduce cooling efficiency.

Why Replacement Matters:
  • Prevents coolant leaks that can lead to low coolant levels and reduced cooling efficiency.
  • Maintains correct pressure regulation, allowing the cooling system to expand and contract safely as temperatures change.
  • Helps avoid engine overheating, since coolant loss or trapped air can disrupt circulation.
  • Prevents air pockets in the cooling system, which can reduce heat transfer efficiency.
  • Protects surrounding components, as leaking coolant can damage sensors, wiring, and nearby engine parts.



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

9A712244700
9A712244700

The product you are viewing cross references to these numbers
Heating Hose. Porsche 971.1 / 971.2 Panamera 2017-24 - 9A781931600
2
Heating Hose. Porsche 971.1 / 971.2 Panamera 2017-24
Special Order item
9A781931600
Product Information
Product Information
Heating Hose.

Ensure consistent cabin warmth and efficient engine heat transfer with the Heating Hose. This OEM-quality hose is designed to transport heated coolant from the engine to the heater core, enabling proper HVAC performance and reliable interior heating.

Fits:

  • Porsche 971.1 Panamera V6 3.0L 2WD (330 Hp) 2017-20
  • Porsche 971.1 Panamera 4 V6 3.0L 4WD (330 Hp) 2017-20
  • Porsche 971.1 Panamera 4 V6 3.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera 4 3.0L Turbocharged V6 Sport Turismo 2017-20
  • Porsche 971.1 Panamera 4S V6 3.0L 4WD (440 Hp) 2017-20
  • Porsche 971.1 Panamera 4S V6 3.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera 4S 2.9L Twin-Turbo V6 Sport Turismo 2017-20
  • Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
  • Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
  • Porsche 971.1 Panamera Turbo S E-Hybrid V8 4.0L 4WD 2017-20
  • Porsche 971.1 Panamera Turbo S E-Hybrid V8 4.0L 4WD Executive 2017-20
  • Porsche 971.2 Panamera 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera GTS 4.0L V8 2021-23
  • Porsche 971.2 Panamera GTS Sport Turismo 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S Sport Turismo 4.0L V8 2021-23  

Diagram Ref No 1

What This Product Does:

  • Delivers heated coolant to the heater core
  • Returns coolant back to the engine for continuous circulation
  • Enables proper cabin heating performance
  • Supports overall cooling system efficiency

Symptoms Of Wear Or Failure:
  • Coolant leaks near the heater core or engine bay
  • Sweet coolant smell inside or outside the vehicle
  • Damp carpet or moisture inside the cabin (in some cases)
  • Heater blowing cold or inconsistent warm air
  • Low coolant warning light or frequent coolant top-offs
  • Engine running hotter than normal
  • Cracks, bulging, or swelling along the hose
  • Soft, brittle, or spongy rubber texture
  • Coolant residue around hose fittings or clamps

Why Replacement Matters:
  • Replacing a worn or damaged heating hose is important because it plays a critical role in both the cooling system and the cabin heating system. A failing hose can leak coolant, reducing circulation and causing the engine to run hotter than normal.
  • If the hose ruptures or leaks severely, it may lead to coolant loss, overheating, and costly engine damage. It can also cause poor heater performance and may even allow coolant to enter the cabin area.
  • Installing a new heating hose helps restore proper coolant flow, improves heating efficiency, prevents leaks, and protects the engine from overheating.



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

9A781931600
9A781931600

The product you are viewing cross references to these numbers
Heating Hose. Porsche 971.1 / 971.2 Panamera 2017-24 - 9A781931600
2
Heating Hose. Porsche 971.1 / 971.2 Panamera 2017-24
9A781931600/1
Product Information
Product Information
Heating Hose.

Ensure consistent cabin warmth and efficient engine heat transfer with the OE MATCH Heating Hose. This OE MATCH hose is designed to transport heated coolant from the engine to the heater core, enabling proper HVAC performance and reliable interior heating.

Fits:

  • Porsche 971.1 Panamera V6 3.0L 2WD (330 Hp) 2017-20
  • Porsche 971.1 Panamera 4 V6 3.0L 4WD (330 Hp) 2017-20
  • Porsche 971.1 Panamera 4 V6 3.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera 4 3.0L Turbocharged V6 Sport Turismo 2017-20
  • Porsche 971.1 Panamera 4S V6 3.0L 4WD (440 Hp) 2017-20
  • Porsche 971.1 Panamera 4S V6 3.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera 4S 2.9L Twin-Turbo V6 Sport Turismo 2017-20
  • Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
  • Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
  • Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
  • Porsche 971.1 Panamera Turbo S E-Hybrid V8 4.0L 4WD 2017-20
  • Porsche 971.1 Panamera Turbo S E-Hybrid V8 4.0L 4WD Executive 2017-20
  • Porsche 971.2 Panamera 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4 Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S 2.9L V6 2021-23
  • Porsche 971.2 Panamera 4S Sport Turismo 2.9L V6 2021-23
  • Porsche 971.2 Panamera GTS 4.0L V8 2021-23
  • Porsche 971.2 Panamera GTS Sport Turismo 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S 4.0L V8 2021-23
  • Porsche 971.2 Panamera Turbo S Sport Turismo 4.0L V8 2021-23  

Diagram Ref No 1

What This Product Does:

  • Delivers heated coolant to the heater core
  • Returns coolant back to the engine for continuous circulation
  • Enables proper cabin heating performance
  • Supports overall cooling system efficiency

Symptoms Of Wear Or Failure:
  • Coolant leaks near the heater core or engine bay
  • Sweet coolant smell inside or outside the vehicle
  • Damp carpet or moisture inside the cabin (in some cases)
  • Heater blowing cold or inconsistent warm air
  • Low coolant warning light or frequent coolant top-offs
  • Engine running hotter than normal
  • Cracks, bulging, or swelling along the hose
  • Soft, brittle, or spongy rubber texture
  • Coolant residue around hose fittings or clamps

Why Replacement Matters:
  • Replacing a worn or damaged heating hose is important because it plays a critical role in both the cooling system and the cabin heating system. A failing hose can leak coolant, reducing circulation and causing the engine to run hotter than normal.
  • If the hose ruptures or leaks severely, it may lead to coolant loss, overheating, and costly engine damage. It can also cause poor heater performance and may even allow coolant to enter the cabin area.
  • Installing a new heating hose helps restore proper coolant flow, improves heating efficiency, prevents leaks, and protects the engine from overheating.



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

9A781931600
9A781931600

The product you are viewing cross references to these numbers
O-Ring (17x3) for Turbo Coolant & Oil Lines for Porsche 971 & 976 Panamera V8 / 9YA Cayenne V8 - 9A700653700
2
O-Ring (17x3) for Turbo Coolant & Oil Lines for Porsche 971 & 976 Panamera V8 / 9YA Cayenne V8
Special Order item
9A700653700
Product Information
Product Information
O-ring - 17 x 3 - for the turbocharger coolant and oil lines. 

Fits:

Porsche 971-1 Panamera GTS 4.0L V8 2017-21
Porsche 971-1 Panamera Turbo 4.0L V8 2017-21
Porsche 971-1 Panamera Turbo S E-Hybrid 4.0L V8 2017-21

Porsche 971-2 Panamera GTS 4.0L V8 2021-24
Porsche 971-2 Panamera Turbo S 4.0L V8 2021-24
Porsche 971-2 Panamera Turbo S E-Hybrid 4.0L V8 2021-24

Porsche 976 Panamera Turbo E-Hybrid 4.0L V8 2021-24

Porsche 9YA-1 Cayenne GTS 4.0L V8 2018-24
Porsche 9YA-1 Cayenne Turbo 4.0L V8 2018-24
Porsche 9YA-1 Cayenne Turbo S E-Hybrid 4.0L V8 2018-24
Porsche 9YA-1 Cayenne Turbo GT 4.0L V8 2018-24

Porsche 9YA-2 Cayenne S 4.0L V8 2023>>
Porsche 9YA-2 Cayenne GTS 4.0L V8 2023>>
Porsche 9YA-2 Cayenne Turbo E-Hybrid 4.0L V8 2023>>
Porsche 9YA-2 Cayenne Turbo GT 4.0L V8 2023>>

Diagram reference(s): 

No. 2 
No. 5
No. 10 
No. 13
No. 17



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

9A700653700
9A700653700

The product you are viewing cross references to these numbers
DISPLAYING 1 to 5 (of 5 products)
About Engine Block Hoses

Engine Block Coolant Hoses – Front Engine Porsche Models | Reliable Cooling for Peak Performance

Engine block coolant hoses are critical to maintaining stable engine temperatures and preventing overheating in your Porsche’s front-engine cooling system. These hoses circulate coolant between the engine block, radiator, and heater core, ensuring consistent temperature regulation and efficient heat dissipation — essential for performance, reliability, and longevity.

At Design911, we supply a complete selection of genuine and manufacturer-quality engine block coolant hoses for front-engine Porsche models, including the transaxle models, Cayenne, Panamera, and Macan. Each hose is precisely engineered for a perfect fit and superior heat resistance, offering the same durability, flexibility, and performance as factory-installed components.

What Do Engine Block Coolant Hoses Do?

Coolant hoses in the engine block are responsible for transferring coolant throughout the engine’s cooling circuit. Their main functions include:

  • Carrying coolant between the radiator, water pump, and engine block.
  • Regulating engine temperature for efficient performance.
  • Maintaining system pressure within the cooling system.
  • Preventing heat build-up that can lead to overheating or gasket failure.

Properly functioning coolant hoses are essential for ensuring your Porsche’s front-mounted engine operates within optimal temperature ranges — especially during heavy use or long drives.

Why Do Engine Block Coolant Hoses Fail?

Due to constant exposure to heat, pressure, and coolant chemicals, these hoses naturally degrade over time. Common causes of failure include:

  • Heat damage from prolonged exposure to high engine temperatures.
  • Rubber deterioration or cracking from age and coolant corrosion.
  • Leaks at joints or clamps due to pressure fluctuations.
  • Swelling or soft spots from internal chemical breakdown.
  • Mechanical abrasion from contact with nearby components.

Symptoms of failing hoses include visible coolant leaks, overheating, low coolant levels, or a strong coolant smell from the engine bay.

Why Replace Faulty Engine Block Coolant Hoses?

A leaking or weakened hose can cause serious cooling system failures, including overheating and engine damage. Replacing old or brittle hoses ensures reliable coolant circulation and safeguards your Porsche’s engine performance.

Benefits of replacement include:

  • Restored cooling efficiency and pressure control.
  • Prevention of leaks and overheating.
  • Improved long-term reliability and system safety.
  • Manufacturer-quality materials for perfect fit and heat resistance.

All replacement hoses in this range are constructed using reinforced, high-grade rubber compounds that meet or exceed factory standards, ensuring durability and dependability in all driving conditions.

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