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Engine Block Hoses

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DISPLAYING 1 to 6 (of 6 products)
Special Order item
971122109E
Product Information
Product Information
Coolant Hose For Reservoir, Lower.
The Coolant Hose for Reservoir, Lower is a genuine Porsche OEM coolant hose designed to connect the lower section of the coolant expansion tank to the engine cooling system. This hose plays an important role in maintaining proper coolant circulation and pressure balance by routing overflow and return coolant through the closed-loop cooling circuit. Manufactured to Porsche specifications, it provides precise fitment, excellent resistance to heat and coolant exposure, and long-term durability for Porsche Panamera (971 / 976) 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 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 971.2 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 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 10

What This Product Does:

  • Routes coolant between the reservoir and cooling system, allowing coolant to move in and out as temperatures change.
  • Returns overflow coolant back into the closed-loop cooling circuit during normal operation.
  • Helps maintain proper coolant level and system pressure balance as the engine heats up and cools down.
  • Provides a flexible, heat-resistant connection that accommodates engine movement and thermal expansion.

Symptoms Of Wear Or Failure:
  • Coolant may drip or seep from the hose body or connections, often leaving dried residue around the reservoir.
  • A leaking reservoir hose can cause gradual coolant loss, leading to frequent topping up.
  • Modern Porsche models will often warn you quickly if coolant level drops.
  • A coolant smell in the engine bay is a common sign of leakage.
  • Signs include cracking or splitting, swelling or bulging, hardened or brittle rubber, coolant staining on the hose surface.
  • Coolant loss or air entering the system can reduce cooling efficiency and cause temperature issues.
  • A failing reservoir hose may lead to improper pressure control, sometimes causing coolant to escape under pressure.

Why Replacement Matters:
  • Prevents coolant leaks that can lead to low coolant levels and reduced cooling efficiency.
  • Maintains proper pressure control, allowing the cooling system to expand and contract safely during temperature changes.
  • Helps avoid engine overheating, since coolant loss or air intrusion can disrupt circulation.
  • Protects nearby components, as leaking coolant can damage hoses, wiring, sensors, and surrounding engine parts.
  • Restores reliable cooling system operation, ensuring overflow coolant is properly routed within the closed-loop system.



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

971122109E
971122109E

The product you are viewing cross references to these numbers
971122109E/1
Product Information
Product Information
Coolant Hose For Reservoir, Lower.
The Coolant Hose for Reservoir, Lower is a OE MATCH coolant hose designed to connect the lower section of the coolant expansion tank to the engine cooling system. This hose plays an important role in maintaining proper coolant circulation and pressure balance by routing overflow and return coolant through the closed-loop cooling circuit. It provides precise fitment, excellent resistance to heat and coolant exposure, and long-term durability for Porsche Panamera (971 / 976) 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 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 971.2 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 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 10

What This Product Does:

  • Routes coolant between the reservoir and cooling system, allowing coolant to move in and out as temperatures change.
  • Returns overflow coolant back into the closed-loop cooling circuit during normal operation.
  • Helps maintain proper coolant level and system pressure balance as the engine heats up and cools down.
  • Provides a flexible, heat-resistant connection that accommodates engine movement and thermal expansion.

Symptoms Of Wear Or Failure:
  • Coolant may drip or seep from the hose body or connections, often leaving dried residue around the reservoir.
  • A leaking reservoir hose can cause gradual coolant loss, leading to frequent topping up.
  • Modern Porsche models will often warn you quickly if coolant level drops.
  • A coolant smell in the engine bay is a common sign of leakage.
  • Signs include cracking or splitting, swelling or bulging, hardened or brittle rubber, coolant staining on the hose surface.
  • Coolant loss or air entering the system can reduce cooling efficiency and cause temperature issues.
  • A failing reservoir hose may lead to improper pressure control, sometimes causing coolant to escape under pressure.

Why Replacement Matters:
  • Prevents coolant leaks that can lead to low coolant levels and reduced cooling efficiency.
  • Maintains proper pressure control, allowing the cooling system to expand and contract safely during temperature changes.
  • Helps avoid engine overheating, since coolant loss or air intrusion can disrupt circulation.
  • Protects nearby components, as leaking coolant can damage hoses, wiring, sensors, and surrounding engine parts.
  • Restores reliable cooling system operation, ensuring overflow coolant is properly routed within the closed-loop system.



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

971122109E
971122109E

The product you are viewing cross references to these numbers
Special Order item
9A712210110
Product Information
Product Information
Coolant Pipe.
The Coolant Pipe is a genuine Porsche OEM cooling system component designed to transport engine coolant between key cooling circuit components. This coolant pipe forms part of the radiator-to-engine routing, ensuring consistent coolant circulation for efficient heat dissipation and stable engine operating temperatures. Manufactured to Porsche specifications, it provides precise fitment, secure sealing, and high resistance to heat and pressure. Designed for Porsche Panamera (971 and 976) models, this coolant pipe helps maintain reliable cooling system performance and long-term durability.

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 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 971.2 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 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 18

What This Product Does:

  • Transports engine coolant through the cooling circuit to help remove heat from the engine.
  • Connects major components such as the radiator and engine cooling lines, ensuring consistent coolant circulation.
  • Supports stable engine temperature control by allowing coolant to flow efficiently for heat dissipation.
  • Provides a durable, sealed connection designed to withstand high pressure, heat, and vibration.

Symptoms Of Wear Or Failure:
  • Coolant may seep or drip from cracks in the pipe or from the connection points, often leaving wet staining or dried coolant residue.
  • A leaking coolant pipe can cause gradual coolant loss, requiring frequent topping up.
  • Coolant loss or restricted coolant flow can reduce cooling efficiency and lead to overheating.
  • A sweet odor in the engine bay is a common sign of a coolant leak.
  • Signs may include cracks or splits, worn sealing surfaces, damaged connection ends, coolant staining along the pipe.
  • Low coolant warnings may appear if the leak becomes significant.
  • A failing pipe or seal can reduce system pressure, affecting overall cooling performance.

Why Replacement Matters:
  • Prevents coolant leaks that can lead to low coolant levels and loss of system pressure.
  • Helps avoid engine overheating, which can cause severe and costly engine damage.
  • Restores proper coolant circulation, ensuring efficient heat dissipation through the radiator and engine.
  • Maintains correct system pressure, which is critical for optimal cooling performance.
  • Protects nearby components, as leaking coolant can damage wiring, sensors, belts, and other engine bay parts.



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

9A712210110
9A712210110

The product you are viewing cross references to these numbers
9A712210110/1
Product Information
Product Information
Coolant Pipe.
The Coolant Pipe is a OE MATCH cooling system component designed to transport engine coolant between key cooling circuit components. This coolant pipe forms part of the radiator-to-engine routing, ensuring consistent coolant circulation for efficient heat dissipation and stable engine operating temperatures. It provides precise fitment, secure sealing, and high resistance to heat and pressure. Designed for Porsche Panamera (971 and 976) models, this coolant pipe helps maintain reliable cooling system performance and long-term durability.

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 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 971.2 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 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 18

What This Product Does:

  • Transports engine coolant through the cooling circuit to help remove heat from the engine.
  • Connects major components such as the radiator and engine cooling lines, ensuring consistent coolant circulation.
  • Supports stable engine temperature control by allowing coolant to flow efficiently for heat dissipation.
  • Provides a durable, sealed connection designed to withstand high pressure, heat, and vibration.

Symptoms Of Wear Or Failure:
  • Coolant may seep or drip from cracks in the pipe or from the connection points, often leaving wet staining or dried coolant residue.
  • A leaking coolant pipe can cause gradual coolant loss, requiring frequent topping up.
  • Coolant loss or restricted coolant flow can reduce cooling efficiency and lead to overheating.
  • A sweet odor in the engine bay is a common sign of a coolant leak.
  • Signs may include cracks or splits, worn sealing surfaces, damaged connection ends, coolant staining along the pipe.
  • Low coolant warnings may appear if the leak becomes significant.
  • A failing pipe or seal can reduce system pressure, affecting overall cooling performance.

Why Replacement Matters:
  • Prevents coolant leaks that can lead to low coolant levels and loss of system pressure.
  • Helps avoid engine overheating, which can cause severe and costly engine damage.
  • Restores proper coolant circulation, ensuring efficient heat dissipation through the radiator and engine.
  • Maintains correct system pressure, which is critical for optimal cooling performance.
  • Protects nearby components, as leaking coolant can damage wiring, sensors, belts, and other engine bay parts.



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

9A712210110
9A712210110

The product you are viewing cross references to these numbers
Special Order item
9A712117100
Product Information
Product Information
O-ring for thermo-pneumatic valve - sits between coolant pipe and the valve itself.

porsche

Fits:
Porsche 971.1 Panamera / Panamera 4 3.0L V6 2017-21
Porsche 971.1 Panamera 4S 2.9L V6 2017-21
Porsche 971.1 Panamera 4 E-Hybrid 2.9L V6 2017-21

--
Porsche 971.2 Panamera / Panamera 4 2.9L V6 2021-24
Porsche 971.2 Panamera 4S 2.9L V6 2021-24
Porsche 971.2 Panamera 4 E-Hybrid 2.9L V6 2021-24
Porsche 971.2 Panamera 4S E-Hybrid 2.9L V6 2021-24
--
Porsche 976 Panamera / Panamera 4 2.9L V6 2024>>
--
Porsche 9YA Cayenne 3.0L V6 2018-24
Porsche 9YA Cayenne S 2.9L V6 2018-24
--
Porsche 9YA-2 Cayenne 3.0L V6 2023>>
--
Porsche 95B-2 Macan S / GTS / Turbo 2.9L V6 2019-25

Click 'Zoom in' for large parts diagram.
Diagram ref no 15

Special Order item
9A712143713
Product Information
Product Information
Water Pipe O-Ring, 41.8x1.85. 

Fits:
Porsche 95B.2 Macan S 3.0L V6 Petrol MKII 2019>>2021
Porsche 95B.2 Macan GTS 2.9L V6 Petrol MKII 2019>>2021
Porsche 95B.2 Macan Turbo 2.9L V6 MKII 2019>>2021
Cars With Engine Codes:
DLZ / DLZB / DGR / DGRB / DGRC

Porsche 971.1 Panamera 3.0L V6 MKI 2017>>2020
Porsche 971.1 Panamera 2.9L / 2.9L E-Hybrid MKI 2017>>2020
Cars With Engine Codes:
CSZ / CSZA / CSZB / CXT / CXTA / DGP / DGPA

Porsche 971.2 Panamera 2.9L / 2.9L E-Hybrid MKII 2021>>2023
Cars With Option Codes:
0K0 - Without Alternative Drive System
0K3 - Hybrid Propulsion System PHEV

Porsche 976 Panamera 2.9L / 2.9L E-Hybrid 2023>>

Porsche 9YA Cayenne 3.0L / 3.0L E-Hybrid 2018>>2023
Porsche 9YA Cayenne 2.9L / 2.9L E-Hybrid 2018>>2023
Cars With Engine Codes:
DCAB / DCA / DCBE / DCB

Porsche 9YB Cayenne / Cayenne S 3.0L / 3.0L E-Hybrid 2023>>

Diagram Ref No 11

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

9A712143713
9A712143713
9A712143712

The product you are viewing cross references to these numbers
DISPLAYING 1 to 6 (of 6 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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