Engine coolant expansion tank kit with sensor. Porsche 986 Boxster / 987.1 Boxster 1997-06  ❭  COOLTANKKIT986.2

Engine coolant expansion tank kit with sensor.
This complete cooling system refresh kit combines essential components - expansion tank, sealing cap, level sensor, and long-life antifreeze — to maintain proper engine cooling performance and fluid management over the long term.

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2.7L / 3.2L 2005 - 2006 (9625, 9626)

Diagram ref no 8, 11, 26, 27, 34

This OE Match kit is designed for Porsche models that use the 99610614708 expansion tank - such as Porsche Boxster 986 (1997–2004) and Boxster 987 (2005–2006). Always confirm compatibility with the exact model year and engine before purchase.

This engine coolant expansion tank kit includes four key OE Match components that work together to ensure efficient and reliable cooling system operation:
• 99610614708/1 × 1 – OE Match Coolant Expansion Tank: A precision-engineered coolant reservoir designed to replace the original plastic tank on Porsche models like the Boxster (986/987). It stores excess coolant as the engine heats and expands.
•  99610644704/1 × 1 – OE Match Expansion Tank Cap: A direct-fit pressure cap that seals the reservoir and maintains the proper cooling system pressure to optimise thermal performance.
•  00004330194 × 5 – Comma Antifreeze 1 L Red Coolant Concentrate (5-Year Long Life): High-quality antifreeze designed to be mixed with distilled water, offering excellent corrosion protection and extended service life (up to 5 years).
•  99764150300 × 1 – Coolant Level Sensor: OE Match coolant level sensor that monitors the reservoir’s fluid level and enables accurate dashboard warnings to help prevent low-coolant conditions.
This kit addresses both fluid containment and monitoring functions of the coolant system - essential for engine health and performance.

This engine cooling kit enables your vehicle’s cooling system to manage thermal expansion, maintain correct coolant levels, and monitor fluid status effectively. The expansion tank stores overflow coolant when the engine warms up and returns it to the system as it cools down. The pressure cap helps hold system pressure, which elevates boiling point and prevents boil-over. The level sensor ensures accurate monitoring, while the antifreeze helps protect against corrosion and temperature extremes.

Over time, coolant expansion tanks can crack, deform, or develop leaks due to heat cycling and material fatigue. A failing tank or cap can lead to loss of coolant, poor pressure control, and engine overheating. The level sensor can also fail or give inaccurate readings as it ages. Replacing these components with OE Match quality parts restores proper coolant containment, pressure regulation, and fluid level monitoring - helping protect the engine from thermal stress and potentially costly damage.

Replace these parts when you notice any of the following conditions:
•  Cracks or visible leaks around the expansion tank
•  Discolouration or brittleness of plastic components
•  Coolant level fluctuations without visible leaks
•  Overheating symptoms or reduced cooling performance
•  Routine coolant system maintenance interval is due

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