Coolant Bottles / Expansion Tanks

Engine coolant expansion tank kit with sensor.
This kit includes a direct-fit coolant expansion tank, pressure cap, long-life red antifreeze, and a coolant level sensor, giving you the essential components needed to refresh the coolant reservoir side of the engine cooling system with parts that match the original equipment specifications.

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, 2, 3, 4, 5, 13, 14, 17.

The core expansion tank included - part 99610615704 - is designed for Porsche 911 models (996 & early-mid 997 generations) from roughly 2001 to 2012 family vehicles when equipped with the matching cooling setup. It is precision-moulded for proper hose and sensor connections.  Always double-check fitment with your vehicle’s year, model and engine before ordering.

The Engine Coolant Expansion Tank Kit brings together the key components responsible for reliable coolant overflow control, pressure sealing, fluid protection, and level monitoring:

• 99610615704/1 × 1 – OE Match Coolant Expansion Tank incl. Cap (99610644704): Precision-matched coolant reservoir engineered to replicate the original Porsche expansion tank for the 911 (996/997) cooling system. Correct pressure cap that seals the expansion tank and helps maintain proper system pressure to optimise coolant performance.

•  00004330194 × 5 – Comma Antifreeze 1 L Red Concentrate (5-Year Protection): High-quality coolant concentrate designed for long life protection against corrosion, freeze, and boil when mixed with distilled water.

•  99764150300/1 × 1 – OE Match Coolant Level Sensor: that fits into the expansion tank, monitoring coolant level and triggering alerts if it falls below safe thresholds.

Together, these parts provide a comprehensive OE Match solution for maintaining or overhauling your cooling system’s expansion reservoir assembly.

Coolant expansion tanks can become brittle and crack over time due to heat cycling, stringently affecting coolant containment and pressure regulation. Old or degraded antifreeze also loses protective properties against corrosion and thermal stress. A failing level sensor can result in inaccurate or missing low-coolant warnings, increasing risk of overheating and engine damage. By replacing all key components with OE Match quality parts, you help maintain proper cooling function, consistent performance, and long-term reliability.

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.

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

COOLTANKKIT997.2

The product you are viewing cross references to these numbers

Engine coolant expansion tank kit with sensor.
A complete OE Genuine Porsche cooling system service kit that includes all the factory-specified components perfect for routine maintenance or when replacing worn cooling system components to maintain precise temperature control and system integrity.

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, 2, 3, 4, 5, 13, 14, 17.

This OE Genuine Porsche kit is designed for Porsche models that use part number 99610615704 for the coolant expansion reservoir - commonly found on Porsche 911 (996 & early 997) vehicles from roughly 2001-2012. Always verify specific model and year compatibility before installation.

This service kit combines essential Genuine Porsche components engineered to work together for optimal cooling system performance:

• 99610615704 × 1 – Genuine Porsche Coolant Expansion Tank: Factory-designed coolant reservoir that collects expanding coolant as engine temperatures rise and returns it as the system cools. Built to exact Porsche OE specifications for perfect fit and long service life.

•  99610644704 × 1 – Genuine Porsche Expansion Tank Cap: Original equipment pressure cap that seals the reservoir and maintains correct cooling system pressure for efficient thermal control.

•  99764150300 × 1 – Genuine Porsche Coolant Level Sensor: Factory fluid level sensor ensures accurate monitoring of coolant level and integrates with the vehicle’s onboard warning system for enhanced safety.

•  00004330515 × 5 – Genuine Porsche Long-Life Antifreeze (1 L, Red, 5-Year Protection): Factory-approved coolant concentrate formulated to deliver extended thermal protection and corrosion resistance when mixed with distilled water.

Together, these parts create a comprehensive cooling system refresh kit designed to restore and maintain proper coolant management under all driving conditions.

Over time, the original coolant expansion tank can become brittle, discoloured, or cracked due to repeated heat cycling and chemical exposure, potentially leading to leaks, reduced pressure control, and poor cooling performance. Old or degraded coolant loses its protective properties, increasing the risk of corrosion and overheating. Failing to replace worn parts can result in costly engine damage. Using Genuine Porsche parts ensures factory-original fit, dependable performance, and long-term reliability - preserving engine health and cooling efficiency.

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.

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

COOLTANKKIT997.2.OE

The product you are viewing cross references to these numbers

Engine coolant expansion tank kit.
This kit includes a direct-fit coolant expansion tank, pressure cap, long-life red antifreeze, and a coolant level sensor, giving you the essential components needed to refresh the coolant reservoir side of the engine cooling system with parts that match the original equipment specifications.

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 OE Match kit is designed for Porsche vehicles that use part number 99610615704 for their coolant expansion reservoir, commonly fitting Porsche 911 models (996 & early 997 series). Always check your vehicle’s specific model year and engine to confirm fitment before purchasing.

This Engine Coolant Expansion Tank Kit combines the essential OE Match components needed for proper cooling system service:

• 99610615704/1 × 1 – OE Match Coolant Expansion Tank incl. Cap (99610644704): Precision-matched coolant reservoir engineered to replicate the original Porsche expansion tank for the 911 (996/997) cooling system. Correct pressure cap that seals the expansion tank and helps maintain proper system pressure to optimise coolant performance.

•  00004330194 × 5 – Comma Antifreeze 1 L Red Concentrate (5-Year Protection): High-quality coolant concentrate designed for long life protection against corrosion, freeze, and boil when mixed with distilled water.

Together, these components ensure your cooling system is refreshed with quality parts that closely match the original performance and characteristics.

This kit helps restore your cooling system’s ability to manage the expansion and contraction of engine coolant as temperature fluctuates. The expansion tank safely captures excess coolant, the pressure cap maintains system integrity and boiling point, and the long-life antifreeze protects internal components from corrosion, overheat or freeze damage.

Over time, the original coolant expansion tank and cap can become brittle, discoloured, cracked or weakened due to repeated heat cycles and coolant exposure. A failing tank may allow coolant loss or air entry into the system, while old or depleted coolant loses protective properties. An OE Match tank and cap restore proper coolant containment and pressure control - and replenishing the coolant with high-quality antifreeze extends protection against corrosion and temperature extremes for years.

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.

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

COOLTANKKIT997.1

The product you are viewing cross references to these numbers

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.

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

COOLTANKKIT997.1.OE

The product you are viewing cross references to these numbers