Coolant Bottles / Expansion Tanks

Cap for coolant expansion tank. 

Fits:
Porsche 992-1 Carrera 2019-24
Porsche 992-1 Turbo 2020>>
Porsche 992-1 GT3 / GT3 RS 2021>>

Porsche 992-2 Carrera 2024>>

Diagram ref. 2.

Related reference numbers
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9P1121321A

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Water reservoir bleeder valve. 

Fits:
Porsche 95B.1 Macan S 3.0L / Turbo 3.6L 2014 - 2019
Porsche 970 Panamera / S / GTS / TURBO / HYBRID 2010 - 2016

Porsche 981 Boxster 2012 - 2016
Porsche 981C Cayman 2014 - 2016
Porsche 981C Cayman GT4 2016

Porsche 991.1 2012 - 2016 All models
Porsche 991.2 2017 - 2019 All models
Porsche 992.1 2019 - 2024 All models

Porsche 958 Cayenne 3.6L V6  2011 - 2018
Porsche 958 Cayenne 4.8L V8  2011 - 2018

Diagram ref no 3

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7P5121671A

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Water Reservoir Bleeder Valve
The water reservoir bleeder valve (7P5121671A / A1216152) is a key cooling system component that regulates pressure and allows trapped air to escape from the expansion tank. By ensuring consistent coolant circulation and correct pressure balance, it prevents overheating and maintains long-term engine reliability.

Fits: 

• Porsche Boxster 981 2.7L 2012-16
• Porsche Boxster S / GTS 981 3.4L 2012-16
• Porsche 991 Carrera C2 3.4L (350Bhp)
• Porsche 991 Carrera C2S 3.8L (400Bhp)
• Porsche 991 Carrera C4 3.4L (350Bhp)
• Porsche 991 Carrera C4S 3.8L (400Bhp)
• Porsche 991 Turbo 3.8L (520bhp
• Porsche 991 Turbo S 3.8L (560Bhp)
• Porsche 991 GT3 3.8L (475Bhp)
• Porsche 991 GT3 RS 4.0L (500Bhp)
• Porsche 991 Carrera 2 3.0L (370 Bhp)
• Porsche 991 Carrera 2S 3.0L (420 Bhp)
• Porsche 991 Carrera 4 3.0L (370 Bhp)
• Porsche 991 Carrera 4S 3.0L (420 Bhp)
• Porsche 991 Cabriolet 2 3.0L (370 Bhp)
• Porsche 991 Cabriolet 2S 3.0L (420 Bhp)
• Porsche 991 Cabriolet 4 3.0L (370 Bhp)
• Porsche 991 Cabriolet 4S 3.0L (420 Bhp)
• Porsche 991 Targa 4 3.0L (370 Bhp)
• Porsche 991 Targa 4S 3.0L (420 Bhp)
• Porsche 991 Turbo Coupe 3.8L (540 Bhp)
• Porsche 991 Turbo S Coupe 3.8L (580 Bhp)
• Porsche 991 Turbo Cabriolet 3.8L (540 Bhp)
• Porsche 991 Turbo S Cabriolet 3.8L (580 Bhp)
• Porsche 991 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp)
• Porsche 992 Carrera 2 3.0L
• Porsche 992 Carrera 4 3.0L
• Porsche 992 Carrera 2 Cabriolet 3.0L
• Porsche 992 Carrera 4 Cabriolet 3.0L
• Porsche 992 Carrera 2S 3.0L
• Porsche 992 Carrera 4S 3.0L
• Porsche 992 Carrera 2S Cabriolet 3.0L
• Porsche 992 Carrera 4S Cabriolet 3.0L
• Porsche 992 Targa 4 3.0L
• Porsche 992 Targa 4S 3.0L
• Porsche 992 Speedster 4.0L
• Porsche 992 Turbo 3.8L
• Porsche 992 Turbo S 3.8L
• Porsche 992 Turbo Cabriolet 3.8L
• Porsche 992 Turbo S Cabriolet 3.8L
• Porsche 992 GT3 4.0L / 992 S/T 4.0L
• Porsche 992 GT3 RS 4.0L
• Porsche 992 (911) Sport Classic 3.8L
• Porsche Cayman 2.7L 981 2013-16
• Porsche Cayman S / GTS 3.4L 981 2013-16
• Porsche Cayman GT4 3.8L 2015-16
• Porsche Cayenne V6 3.6L Petrol 300Hp
• Porsche Cayenne S V8 4.8L Petrol 400HP
• Porsche Cayenne GTS V8 4.8L Petrol 400HP
• Porsche Cayenne Turbo V8 4.8L Petrol 500HP
• Porsche Cayenne Turbo S V8 4.8L Petrol 550HP
• Porsche Panamera S V8 4.8L
• Porsche Panamera 4S V8 4.8L
• Porsche Panamera GTS V8 4.8L
• Porsche Panamera Turbo V8 4.8L
• Porsche Panamera Turbo S V8 4.8L
• Porsche Panamera S Hybrid V6 3.0L
• Porsche Panamera S V6 Turbo 3.0L 2WD (420Hp)
• Porsche Panamera S V6 Turbo 3.0L 2WD Executive
• Porsche Panamera 4S V6 Turbo 3.0L 4WD (420Hp)
• Porsche Panamera 4S V6 Turbo 3.0L 4WD Executive
• Porsche Panamera GTS V8 4.8L 4WD (440Hp)
• Porsche Panamera Turbo V8 4.8L (520Hp)
• Porsche Panamera Turbo V8 Executive
• Porsche Panamera Turbo S V8 4.8L
• Porsche Panamera S E-Hybrid V6 3.0L (416Hp)
• Porsche Macan S Petrol 3.0L V6 340Bhp
• Porsche Macan S Diesel 3.0L V6 258Bhp
• Porsche Macan Turbo 3.6L V6 400Bhp

Diagram ref no 3 

What the Product Does

• Maintains correct cooling system pressure.
• Releases trapped air bubbles for efficient coolant flow.
• Helps protect against overheating and coolant loss.
• Works with the reservoir and radiator to stabilise engine temperature.

Symptoms of a Failing Bleeder Valve

• Coolant leaks around the expansion tank area.
• Engine overheating or fluctuating temperature gauge.
• Gurgling or bubbling noises from the reservoir.
• Low coolant warnings despite no visible leaks.
• Pressure escaping or hissing sounds near the tank cap/valve area.

Common Reasons for Failure

• Seal Wear: Rubber seals inside the valve degrade with age and heat.
  
• Cracking: Plastic housings can crack from repeated heat cycles.
  
• Contamination: Dirt or poor coolant quality can cause valve sticking.
  
• High Mileage: Natural wear from years of pressure fluctuations.

Why Replace?

• Prevents airlocks and overheating that can damage the engine.
• Restores proper cooling system pressure balance.
• Eliminates coolant leaks and protects against costly repairs.
• Ensures long-term system reliability when paired with fresh coolant.       

Why Buy from Design 911?

• Porsche Specialists: We focus exclusively on Porsche, ensuring accurate fitment.
  
• OEM Quality: All parts meet or exceed factory specifications.
  
• Trusted Worldwide: Relied upon by Porsche owners, restorers, and workshops.
  
• Expert Advice: Backed by a knowledgeable support team to guide your purchase.
  
• Fast & Reliable Shipping: Ensuring you get the parts you need quickly.
  

Ideal For: Cooling system servicing, solving pressure loss issues, or preventive replacement to keep your Porsche running cool and reliable.

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

7P5121671A

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