Coolant bottle. Porsche Boxster 986 / Boxster 987 1997-06

Coolant bottle / Reservoir tank, Comes with black bleeder valve.
Coolant expansion (overflow) tank for the Boxster cooling system. It serves as the reservoir for excess coolant from the radiator, allowing coolant to expand when hot and contract when cooled - keeping the system at correct pressure and preventing overflow or coolant loss.

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2006

Diagram ref no 7

Replace the coolant expansion tank when you notice coolant leaks, hairline cracks, or white residue forming around the tank seams. If the tank becomes discoloured, brittle, or begins to deform from heat, it can no longer maintain proper pressure. Any signs of coolant smell in the rear trunk area, fluctuating coolant levels, or overheating symptoms also indicate the tank should be replaced.

Why replacement matters:
• Prevents coolant leaks that can cause overheating or engine damage
• Restores proper cooling-system pressure and fluid volume
• Stops air from entering the cooling system, which can lead to hot spots and poor circulation
• Prevents unexpected tank failures caused by old, brittle plastic
• Ensures clean, stable coolant flow for long-term engine reliability

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Related, superseded, cross reference or alternative numbers for comparison.

99610614708

The product you are viewing cross references to these numbers