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gasket Genuine Porsche part 982121687

Code: 982121687

Genuine Porsche part

gasket

The product code 982121687 was also found on these diagrams

105-020 - seal end cap

Coolant cooling system / Coolant expansion tank 718 (982) Boxster 2017>>

105-020 - seal end cap

Coolant cooling system / Coolant expansion tank 718C (982C) Cayman 2017>>

Additional information:

• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.

Before purchasing thoroughly check part to confirm compatibility.

Related products

Reservoir Coolant Hose. Porsche 718 (982) Boxster & Cayman 2.0L / 2.5L 2017>>

982121625B/1

Product Information

Reservoir Coolant Hose.

Maintain reliable cooling system performance with the Reservoir Coolant Hose. This OE MATCH hose is designed to transfer coolant between the coolant reservoir (expansion tank) and the engine cooling system, helping ensure proper coolant circulation and stable system pressure.

Fits:

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Diagram Ref No 6

What This Product Does:

Moves coolant to and from the coolant reservoir
Helps maintain proper coolant level and circulation
Supports cooling system pressure balance during temperature changes
Prevents overheating by ensuring consistent coolant flow

Symptoms Of Wear Or Failure:

Coolant leaks near the reservoir or along the hose line
Low coolant warning light
Frequent coolant top-offs
Sweet coolant smell from the engine bay
Coolant residue or staining around hose connections
Cracks, splits, or swelling in the hose material
Soft, spongy, or brittle rubber texture
Pressure-related seepage around clamps or fittings
Engine running hotter than normal if coolant loss becomes severe

Why Replacement Matters:

Replacing a worn reservoir coolant hose is important because it helps maintain proper coolant circulation and supports stable cooling system pressure. Over time, heat and constant exposure to coolant can cause the hose to crack, weaken, or leak.
If the hose fails, it may lead to coolant loss, poor pressure regulation, and overheating. Even small leaks can gradually reduce coolant levels and put the engine at risk of serious damage.
Installing a new hose helps prevent leaks, restores reliable coolant flow, and protects the engine by keeping the cooling system operating efficiently.

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Related, superseded, cross reference or alternative numbers for comparison.

982121625B

982121625B

The product you are viewing cross references to these numbers

Coolant Hose - Expansion Tank To Bleeder Valve. Porsche 718 (982) Boxster & Cayman 2.0L / 2.5L 2017>>

982121637A/1

Product Information

Coolant Hose - Expansion Tank To Bleeder Valve.
Ensure proper cooling system ventilation and coolant circulation with the Coolant Hose – Expansion Tank to Bleeder Valve. This OE MATCH hose connects the expansion tank to the bleeder valve, allowing trapped air to escape and helping maintain correct system pressure during engine operation.

Fits:

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Diagram Ref No 5

What This Product Does:

Allows trapped air to escape during coolant circulation
Helps prevent air pockets in the cooling system
Supports stable coolant pressure regulation
Maintains consistent engine operating temperature
Promotes efficient coolant flow throughout the system

Symptoms Of Wear Or Failure:

Coolant leaks near the expansion tank or bleeder valve connection
Low coolant warning light or frequent coolant top-offs
Sweet coolant smell from the engine bay
Coolant residue or staining around hose fittings
Cracks, splits, or brittle hose material
Air trapped in the cooling system, causing gurgling sounds
Fluctuating engine temperature or inconsistent temperature gauge readings
Overheating, especially after coolant service or refilling
Steam from under the hood in severe cases

Why Replacement Matters:

This hose plays a key role in allowing the cooling system to properly vent air and maintain stable pressure. If it becomes cracked, brittle, or blocked, air can remain trapped in the system, leading to inconsistent coolant circulation and temperature fluctuations.
Failure to replace a worn hose may result in coolant leaks, pressure imbalance, overheating, and reduced cooling efficiency. Air pockets in the system can also place additional strain on other cooling components.
Replacing the hose helps ensure proper system bleeding, prevents leaks, and protects the engine by maintaining reliable temperature control and cooling system performance.

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

982121637A

982121637A

The product you are viewing cross references to these numbers

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gasket Genuine Porsche part 982121687