Coolant Bottles / Expansion Tanks

Engine coolant expansion tank kit with sensor.
This is a comprehensive OE Match-quality service kit designed to refresh and restore the engine coolant expansion system for Porsche vehicles. It includes the expansion tank, pressure cap, long-life antifreeze, and a coolant level sensor - giving you all major components needed for a proper coolant system service. 

Fits:
Porsche 996 C2 / C4 1997 - 2000
Porsche 996 GT3 MKI 1997 - 2000

Diagram ref no 1, 2, 3, 4, 5, 9, 11, 12.

This engine coolant expansion tank kit brings together all the essential components that ensure your Porsche’s coolant system works efficiently and reliably:

• 1x 99610614756/1 –  OE Match Coolant Expansion Tank Bottle: A high-quality OE Match reservoir that captures overflow and maintains appropriate coolant volume.

• 1x 99610644704/1 – OE Match Expansion Tank Cap: Maintains correct cooling system pressure to optimize thermal performance.

• 5x 00004330194 – Comma 1 L Antifreeze Concentrate (Red, 5-Year): Long-life coolant concentrate to mix with distilled water, offering corrosion protection and thermal stability.

• 1x 99764150300/1 – OE Match Coolant Level Sensor: Monitors coolant level inside the expansion tank and alerts the driver if the level drops too low.

Together, these items create a complete cooling system refill and monitoring kit.

This kit refurbishes the coolant expansion side of the cooling system. The expansion tank stores excess coolant when the engine heats up and returns it as it cools. The pressure cap ensures the system operates at the correct pressure, which increases coolant boiling point and improves efficiency. The included coolant provides balanced antifreeze protection and corrosion resistance for years, while the sensor keeps track of coolant level and triggers warnings if levels fall below safe thresholds.

Over time, plastic coolant expansion tanks can become brittle, cracked, or distorted, leading to leaks and loss of coolant. A weak pressure cap can fail to maintain proper system pressure, reducing cooling effectiveness. Old coolant can lose its protective qualities, leading to corrosion and overheating. Without a functioning coolant level sensor, you may not be alerted to low coolant levels, increasing risk of engine overheating or damage. This kit replaces all of these important parts at once, restoring correct operation and helping ensure the engine stays well-protected.

Replace any of these components if you observe the following:
•   Cracks, leaks, or deformation in the expansion tank.
•   A non-sealing or failing pressure cap.
•   Coolant looks discoloured, sludgy, or contaminated.
•   Dashboard warning light for coolant level.
•   Regular service interval for coolant change is due.
•   Unexplained engine temperature fluctuations.

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

COOLTANKKIT996.2

The product you are viewing cross references to these numbers

Engine coolant expansion tank kit with sensor.
A complete Genuine Porsche coolant expansion system service kit designed to replace key cooling system components including expansion tank, pressure cap, long-life Porsche coolant concentrate, and a coolant level sensor.

Fits:
Porsche 996 C2 / C4 1997 - 2000
Porsche 996 GT3 MKI 1997 - 2000

Diagram ref no 1, 2, 3, 4, 5, 9, 11, 12.

This is a Genuine Porsche parts kit comprising essential cooling system components for vehicles that use 99610614756 as the engine coolant expansion tank. Genuine parts ensure exact fit and preserved factory-engineered performance and durability.

Kit Includes:
• 99610614756 × 1 – Genuine Porsche Engine Coolant Expansion Tank: Factory reservoir that manages coolant overflow as temperatures change.
• 99610644704 × 1 – Genuine Porsche Expansion Tank Cap: Maintains correct cooling system pressure and seals the reservoir effectively.
• 00004330515 × 5 – Genuine Porsche Antifreeze/Coolant (1 L Bottles, Red, Long-Life): Porsche-approved coolant concentrate that delivers thermal protection and corrosion resistance when mixed correctly with distilled water.
• 99764150300/1 × 1 – Genuine Porsche Coolant Level Sensor: Factory-specified sensor that monitors coolant level inside the expansion tank and alerts the driver of low coolant.

Together, these parts refresh or restore the cooling system’s expansion reservoir side, ensuring proper coolant containment, pressure control, and system monitoring.

Over time, factory expansion tanks and caps can brittle, crack, or lose sealing integrity due to heat cycling and coolant chemistry, leading to leaks, pressure loss, and potential engine overheating. Old coolant may also degrade, losing its protective properties. The coolant level sensor may fail or give false readings if worn. Replacing all of these with Genuine Porsche components ensures continued cooling system integrity, accurate level monitoring, and reliable performance over time.

Replace components in this kit when you observe any of the following:
•  Cracks, distortion, or coolant leaks around the tank
•  Expansion tank cap no longer seals or holds pressure
•  Coolant appears contaminated, discoloured, or degraded
•  Dashboard warning of low coolant level
•  Routine service interval for coolant system maintenance

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

COOLTANKKIT996.2.OE

The product you are viewing cross references to these numbers

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.
The kit combines a coolant expansion tank, a pressure cap, and long-life antifreeze concentrate to deliver a complete coolant system refresh.

Fits:
Porsche 996 C2 / C4 1997 - 2000
Porsche 996 GT3 MKI 1997 - 2000

Diagram ref no 1, 3, 4, 5, 9, 11, 12.

This comprehensive kit includes the essential parts needed when servicing or replacing the coolant expansion system on Porsche models that use part number 99610614756. An OE Match expansion tank provides a direct fit and correct performance:

• 1x 99610614756/1 – OE Match Coolant expansion tank - for correct fit & durability.

• 1x 99610644704/1 – OE Match Coolant expansion tank pressure cap - to hold system pressure and prevent boiling/overflow.

• 5x 00004330194  – Comma Concentrated Long-Life Red Antifreeze / Coolant - for optimal cooling & corrosion protection.

This kit refreshes the entire coolant expansion side of the cooling system. The expansion tank collects excess coolant and allows it to return to the system as temperatures change. The pressure cap controls system pressure, raising coolant boiling point and preventing air ingress. The antifreeze bottles supply corrosion protection, freezing/boiling point stability, and long-term fluid protection when mixed and filled.

A worn or failing expansion tank can crack, leak or lose pressure, leading to coolant loss, overheating, and potential engine damage over time. The pressure cap also plays a critical role: an old or weak cap can fail to hold sufficient system pressure, lowering coolant boiling point and reducing cooling efficiency. Fresh antifreeze not only prevents freezing/boiling extremes but also protects metal parts from corrosion, improving overall engine health and heat management.

Replace components when you notice any of the following:
•  Coolant reservoir shows cracks, swelling, brittleness or leaks.
•  Coolant fluid levels change unexpectedly without visible leaks.
•  Pressure cap no longer maintains correct system pressure.
•  Coolant appears contaminated, sludgy, or discoloured.
•  Recommended coolant change interval (e.g., every 2–5 years) is due.

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

COOLTANKKIT996.1

The product you are viewing cross references to these numbers

Engine coolant expansion tank kit.
This kit includes the expansion tank reservoir, pressure cap, and multiple bottles of genuine Porsche coolant/antifreeze - everything needed for a full coolant system refresh

Fits:
Porsche 996 C2 / C4 1997 - 2000
Porsche 996 GT3 MKI 1997 - 2000

Diagram ref no 1, 3, 4, 5, 9, 11, 12.

This kit is suitable for Porsche models that use part 99610614756 as the coolant expansion tank reservoir.

Kit Includes:
• 99610614756 × 1 - Genuine Porsche Coolant Expansion Tank Bottle: Factory-spec reservoir engineered to handle coolant expansion and contraction as engine temperatures fluctuate.
•  99610644704 × 1 - Genuine Porsche Expansion Tank Cap: Provides reliable system pressure control in the cooling system to maintain boiling point and prevent coolant loss.
•  00004330515 × 5 - Genuine Porsche Antifreeze Coolant 1 Litre (Red, Long Life, 5-Year Protection): High-quality coolant concentrate designed to be mixed 50/50 with distilled water for excellent heat transfer, freeze/boil protection, and corrosion resistance.

This kit restores key components of the engine’s coolant reservoir system. The expansion tank collects and stores excess coolant as it expands during heating, the pressure cap maintains proper system pressure to raise the coolant’s boiling point, and the antifreeze delivers long-lasting thermal protection and corrosion control. Using genuine Porsche coolant ensures fluid chemistry is matched to factory specifications.

With age and heat cycling, the original expansion tank and cap can become brittle, cracked, or unable to maintain proper pressure, leading to coolant loss, air ingress, and potential overheating issues. Using genuine Porsche coolant ensures the fluid meets manufacturer chemistry standards for corrosion protection and performance. Replacing these components with genuine parts helps restore the cooling system’s integrity and protects the engine from thermal stress and premature wear.

Replace these components if you notice any of the following:
•  Visible cracks, leaks, or discoloration on the expansion tank
•  Pressure cap that no longer seals properly
•  Coolant that looks contaminated or past its service life
•  Unexplained coolant loss or coolant level fluctuations
•  Scheduled cooling system maintenance interval reached

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

COOLTANKKIT996.1.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