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Porsche > Macan (95B) MK3 2022>> > Engine Cooling > Coolant Hoses and Pipes >

Engine Block Hoses

Engine Block Hoses

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DISPLAYING 1 to 6 (of 6 products)
Coolant pipe. Porsche 95B Macan / 9YA Cayenne / 971 Panamera
4
Coolant pipe. Porsche 95B Macan / 9YA Cayenne / 971 Panamera
Special Order item
9A712108301
Product Information
Product Information
Coolant pipe.

porsche

Fits:
Porsche 95B.2 Macan 2.9L / 3.0L 2019-21
Porsche 95B.3 Macan 2.9L 2022>>
Porsche 9YA Cayenne 2.9L / 3.0L 2018>>
Porsche 971.1 Panamera 2.9L / 3.0L 2017-20
Porsche 971.2 Panamera 2.9L 2021>>

Click 'Zoom in' for large parts diagram.
Diagram ref no 14
Engine Coolant Breather Line. Porsche 95B.2 / 95B.3 Macan 2.9L / 3.0L 2019>> - 95B122909D
2
Engine Coolant Breather Line. Porsche 95B.2 / 95B.3 Macan 2.9L / 3.0L 2019>>
Special Order item
95B122909D
Product Information
Product Information
Engine Coolant Breather Line.

The Engine Coolant Breather Line is a genuine Porsche cooling system component designed to vent trapped air and regulate pressure within the engine’s coolant circuit. This breather hose allows air and vapour to escape safely, helping maintain proper coolant circulation and consistent system pressure.

Fits:

  • Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
  • Porsche 95B.2 Macan GTS Petrol 2.9L V6 (380Bhp) 2019-21
  • Porsche 95B.2 Macan Turbo 2.9L V6 (440Bhp) 2019-21
  • Porsche 95B.3 Macan S Petrol 2.9L V6 (380Bhp) 2022>>
  • Porsche 95B.3 Macan GTS Petrol 2.9L V6 (440Bhp) 2022>>
  
Diagram Ref No 1

What This Product Does:

  • Allowing trapped air to vent from the coolant circuit
  • Preventing airlocks that can reduce cooling performance
  • Maintaining stable cooling system pressure
  • Supporting efficient coolant flow
  • Helping regulate engine operating temperature

Symptoms Of Wear Or Failure:
  • Coolant leaks near the hose or connection points
  • Cracked, brittle, or split hose material
  • Coolant smell from the engine bay
  • Low coolant warning light
  • Difficulty bleeding the cooling system
  • Fluctuating engine temperature readings
  • Coolant residue around hose fittings

Why Replacement Matters:
  • Maintain correct cooling system pressure
  • Prevent airlocks and coolant circulation issues
  • Protect the engine from overheating damage
  • Restore reliable cooling system performance
  • Avoid costly repairs caused by cooling system failure



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

95B122909D
95B122909D

The product you are viewing cross references to these numbers
Engine Coolant Breather Line. Porsche 95B.2 / 95B.3 Macan 2.9L / 3.0L 2019>> - 95B122909D
2
Engine Coolant Breather Line. Porsche 95B.2 / 95B.3 Macan 2.9L / 3.0L 2019>>
95B122909D/1
Product Information
Product Information
Engine Coolant Breather Line.

The Engine Coolant Breather Line is a OE MATCH cooling system component designed to vent trapped air and regulate pressure within the engine’s coolant circuit. This breather hose allows air and vapour to escape safely, helping maintain proper coolant circulation and consistent system pressure.

Fits:

  • Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
  • Porsche 95B.2 Macan GTS Petrol 2.9L V6 (380Bhp) 2019-21
  • Porsche 95B.2 Macan Turbo 2.9L V6 (440Bhp) 2019-21
  • Porsche 95B.3 Macan S Petrol 2.9L V6 (380Bhp) 2022>>
  • Porsche 95B.3 Macan GTS Petrol 2.9L V6 (440Bhp) 2022>>
  
Diagram Ref No 1

What This Product Does:

  • Allowing trapped air to vent from the coolant circuit
  • Preventing airlocks that can reduce cooling performance
  • Maintaining stable cooling system pressure
  • Supporting efficient coolant flow
  • Helping regulate engine operating temperature

Symptoms Of Wear Or Failure:
  • Coolant leaks near the hose or connection points
  • Cracked, brittle, or split hose material
  • Coolant smell from the engine bay
  • Low coolant warning light
  • Difficulty bleeding the cooling system
  • Fluctuating engine temperature readings
  • Coolant residue around hose fittings

Why Replacement Matters:
  • Maintain correct cooling system pressure
  • Prevent airlocks and coolant circulation issues
  • Protect the engine from overheating damage
  • Restore reliable cooling system performance
  • Avoid costly repairs caused by cooling system failure



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

95B122909D
95B122909D

The product you are viewing cross references to these numbers
Engine Coolant Vent Hose, Upper Centre. Porsche 95B.2 / 95B.3 Macan 2.0L Petrol 2019>> - PAC121081A, PAC121081
2
Engine Coolant Vent Hose, Upper Centre. Porsche 95B.2 / 95B.3 Macan 2.0L Petrol 2019>>
Special Order item
PAC121081A
Product Information
Product Information
Engine Coolant Vent Hose, Upper Centre. 

The Engine Coolant Vent Hose – Upper Centreis a genuine Porsche cooling system component designed to vent trapped air and vapour from the upper section of the engine’s coolant circuit. Positioned centrally in the upper cooling layout, this hose plays a key role in maintaining proper coolant circulation and system pressure balance.

Fits:

  • Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
  • Porsche 95B.3 Macan Petrol 2.0L (265Bhp) 2022>>

Diagram Ref No 15

What This Product Does:
  • Allowing trapped air to escape from the coolant circuit
  • Preventing airlocks that reduce cooling efficiency
  • Maintaining stable cooling system pressure
  • Supporting consistent coolant flow
  • Helping regulate engine operating temperature

Symptoms Of Wear Or Failure:
  • Coolant leaks near the upper engine area
  • Cracked, split, or hardened hose material
  • Coolant smell from the engine bay
  • Low coolant warning light
  • Difficulty bleeding the cooling system
  • Fluctuating engine temperature readings
  • Coolant residue around hose fittings

Why Replacement Matters:
  • Maintain correct cooling system pressure
  • Prevent airlocks and circulation issues
  • Protect the engine from overheating damage
  • Restore reliable cooling system performance
  • Avoid costly repairs caused by cooling system failure



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

PAC121081A
PAC121081A
PAC121081

The product you are viewing cross references to these numbers
Engine Coolant Vent Hose, Upper Centre. Porsche 95B.2 / 95B.3 Macan 2.0L Petrol 2019>> - PAC121081A, PAC121081
2
Engine Coolant Vent Hose, Upper Centre. Porsche 95B.2 / 95B.3 Macan 2.0L Petrol 2019>>
PAC121081A/1
Product Information
Product Information
Engine Coolant Vent Hose, Upper Centre. 

The Engine Coolant Vent Hose – Upper Centre is a OE MATCH cooling system component designed to vent trapped air and vapour from the upper section of the engine’s coolant circuit. Positioned centrally in the upper cooling layout, this hose plays a key role in maintaining proper coolant circulation and system pressure balance.

Fits:

  • Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
  • Porsche 95B.3 Macan Petrol 2.0L (265Bhp) 2022>>

Diagram Ref No 15

What This Product Does:
  • Allowing trapped air to escape from the coolant circuit
  • Preventing airlocks that reduce cooling efficiency
  • Maintaining stable cooling system pressure
  • Supporting consistent coolant flow
  • Helping regulate engine operating temperature

Symptoms Of Wear Or Failure:
  • Coolant leaks near the upper engine area
  • Cracked, split, or hardened hose material
  • Coolant smell from the engine bay
  • Low coolant warning light
  • Difficulty bleeding the cooling system
  • Fluctuating engine temperature readings
  • Coolant residue around hose fittings

Why Replacement Matters:
  • Maintain correct cooling system pressure
  • Prevent airlocks and circulation issues
  • Protect the engine from overheating damage
  • Restore reliable cooling system performance
  • Avoid costly repairs caused by cooling system failure



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

PAC121081A
PAC121081A
PAC121081

The product you are viewing cross references to these numbers
O-Ring for Thermo-Pneumatic Valve. Porsche 971/976 Panamera / 9YA/9YA-2 Cayenne / 95B-2 Macan
4
O-Ring for Thermo-Pneumatic Valve. Porsche 971/976 Panamera / 9YA/9YA-2 Cayenne / 95B-2 Macan
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

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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