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Porsche > Engine Cooling > Coolant Hoses and Pipes > Engine Block Hoses >

Breather Line For Coolant Expansion Tank. Porsche 971.1 / 971.2 / 976 Panamera 2017>>  ❭  9A712244700

Breather Line For Coolant Expansion Tank. Porsche 971.1 / 971.2 / 976 Panamera 2017>> - 9A712244700
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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.



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