Engine coolant expansion tank kit. Porsche 996 2001 >> / 997.1 / 997.2  ❭  COOLTANKKIT997.1.OE

Engine coolant expansion tank kit.
Genuine Porsche cooling system kit provides the genuine coolant expansion tank, correct sealing cap, and long-life antifreeze concentrate - everything needed to refresh and maintain your vehicle’s coolant reservoir system the way Porsche intended.

Fits:
Porsche 996 3.6L C2 / C4 / C4S 2001 - 2005
Porsche 996 Turbo 2001 - 2005
Porsche 996 GT2 2001 - 2005
Porsche 996 GT3 MKII / GT3 RS 2001 - 2005
Porsche 997.1  2005 - 2008 all models
Porsche 997.2 2009 - 2012 all models

Diagram ref no 1, 3, 4, 5, 13, 14, 17.

This Genuine Porsche kit is designed for Porsche models that use part 99610615704 as the coolant expansion reservoir, which includes various 911 (996 & early 997) vehicles (typically fitted to Porsche 911 2001–2012 models). Verify your specific year, model and engine to ensure compatibility.

This engine coolant expansion tank kit includes:

• 99610615704 × 1 – Genuine Porsche Coolant Expansion Tank: The OE-designed coolant reservoir, precision-molded and pressure-tested to factory specifications. It handles expanding coolant as your engine warms, keeping the cooling system stable and correctly balanced.

•  99610644704 × 1 – Genuine Porsche Expansion Tank Cap: A direct-fit factory cap engineered to maintain specified cooling system pressure and seal the reservoir tightly under thermal cycling.

•  00004330515 × 5 – Genuine Porsche Long-Life Antifreeze (1 L Red Concentrate, 5-Year Protection): Porsche-approved long-life coolant concentrate that, when mixed properly with distilled water, offers extended protection against freezing, boiling, and corrosion — critical for long term engine health.

Together, these parts form a complete, genuine Porsche cooling system refresh solution that maintains factory-engineered performance, durability and thermal stability.

Original coolant expansion tanks can become brittle, discoloured or cracked over time due to constant heat cycling and chemical exposure, leading to coolant leaks or pressure loss. A failing reservoir or cap can compromise cooling performance and increase the risk of engine overheating. Additionally, coolant degrades with age and loses protective qualities against rust and thermal stress. Replacing these components with Genuine Porsche products ensures restored system integrity, accurate fluid containment and long-lasting protection - helping preserve engine longevity and performance.

Replace this kit when you notice any of the following: 
•  Cracks, leaks or deformation in the expansion tank
•  Pressure cap no longer seals or maintains system pressure
•  Coolant appears contaminated, sludgy or past its service life
•  Frequent coolant top-ups are required without visible external leaks.

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