Original Porsche Part Genuine Porsche part 982121036B

Coolant Hose, Radiator.
Maintain efficient engine cooling with the Coolant Hose, Radiator. This OEM-quality radiator hose is designed to carry coolant between the engine and radiator, ensuring proper heat dissipation and stable operating temperatures.

Fits:

• Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
• Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
• Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
• Porsche Cayman 718 2.0L Manual (300 Bhp)
• Porsche Cayman 718 2.0L PDK (300 Bhp)
• Porsche Cayman S 718 2.5L Manual (350 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman T 718 2.0L Manual (300 Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
• Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp)

  
Diagram Ref No 17

What This Product Does:

• Carries hot coolant from the engine to the radiator
• Returns cooled coolant back to the engine for continuous circulation
• Helps prevent overheating and maintain stable engine temperature
• Supports overall cooling system efficiency and performance

Symptoms Of Wear Or Failure:

• Coolant leaks under the vehicle or near the radiator
  
• Engine overheating or rising temperature gauge
  
• Low coolant warning light
• Frequent need to top off coolant
• Steam from under the hood
• Sweet coolant smell from the engine bay
  
• Cracks, splits, or visible wear along the hose
  
• Bulging or swelling due to internal weakening
  
• Soft, spongy, or brittle hose texture
• Coolant residue or dampness around hose clamps or fittings
  
  

Why Replacement Matters:

• Replacing a worn radiator coolant hose is essential because it plays a critical role in maintaining proper coolant circulation between the engine and radiator. Over time, heat, pressure, and constant coolant exposure can cause the hose to weaken, crack, or leak.
• If the hose fails, it can lead to rapid coolant loss and engine overheating, which may result in serious damage such as warped components or head gasket failure. A new hose helps restore reliable cooling system performance, prevents leaks, and protects the engine from costly overheating-related repairs.
• Timely replacement ensures safe operation and long-term engine reliability.

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

982121030

The product you are viewing cross references to these numbers

Coolant Hose, Radiator.
Maintain efficient engine cooling with the Coolant Hose, Radiator. This OE MATCH radiator hose is designed to carry coolant between the engine and radiator, ensuring proper heat dissipation and stable operating temperatures.

Fits:

• Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
• Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
• Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
• Porsche Cayman 718 2.0L Manual (300 Bhp)
• Porsche Cayman 718 2.0L PDK (300 Bhp)
• Porsche Cayman S 718 2.5L Manual (350 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman T 718 2.0L Manual (300 Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
• Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp)

  
Diagram Ref No 17

What This Product Does:

• Carries hot coolant from the engine to the radiator
• Returns cooled coolant back to the engine for continuous circulation
• Helps prevent overheating and maintain stable engine temperature
• Supports overall cooling system efficiency and performance

Symptoms Of Wear Or Failure:

• Coolant leaks under the vehicle or near the radiator
  
• Engine overheating or rising temperature gauge
  
• Low coolant warning light
• Frequent need to top off coolant
• Steam from under the hood
• Sweet coolant smell from the engine bay
  
• Cracks, splits, or visible wear along the hose
  
• Bulging or swelling due to internal weakening
  
• Soft, spongy, or brittle hose texture
• Coolant residue or dampness around hose clamps or fittings
  
  

Why Replacement Matters:

• Replacing a worn radiator coolant hose is essential because it plays a critical role in maintaining proper coolant circulation between the engine and radiator. Over time, heat, pressure, and constant coolant exposure can cause the hose to weaken, crack, or leak.
• If the hose fails, it can lead to rapid coolant loss and engine overheating, which may result in serious damage such as warped components or head gasket failure. A new hose helps restore reliable cooling system performance, prevents leaks, and protects the engine from costly overheating-related repairs.
• Timely replacement ensures safe operation and long-term engine reliability.

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

982121030

The product you are viewing cross references to these numbers

Coolant Hose, Lower.
Ensure dependable cooling system performance with the Coolant Hose, Lower. This OEM-quality lower radiator hose is designed to carry coolant between the radiator and engine, supporting proper heat exchange and stable operating temperatures.

Fits:

• Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
• Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
• Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
• Porsche Cayman 718 2.0L Manual (300 Bhp)
• Porsche Cayman 718 2.0L PDK (300 Bhp)
• Porsche Cayman S 718 2.5L Manual (350 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman T 718 2.0L Manual (300 Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
• Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp)

  
Diagram Ref No 18

What This Product Does:

• Returns cooled coolant from the radiator to the engine
• Maintains continuous coolant circulation
• Helps regulate engine operating temperature
• Prevents overheating by supporting efficient heat exchange

Symptoms Of Wear Or Failure:

• Coolant leaking beneath the vehicle
• Engine overheating or fluctuating temperature gauge
  
• Low coolant warning light
• Frequent coolant top-offs
• Steam from under the hood
• Sweet coolant odor from the engine bay
  
• Cracks, splits, or visible deterioration in the hose
  
• Bulging or swelling, indicating internal weakening
  
• Soft, mushy, or brittle rubber texture
• Coolant residue around hose clamps or connection points

Why Replacement Matters:

• The lower coolant hose plays a critical role in returning cooled coolant from the radiator back to the engine. If this hose becomes worn, cracked, or weakened, it can lead to coolant leaks and reduced circulation.
• Failure to replace a damaged hose may result in overheating, engine performance issues, or costly repairs caused by coolant loss. Because the lower hose operates under constant heat and pressure, deterioration over time is normal.
• Replacing it at the first signs of wear helps maintain proper coolant flow, protects the engine from overheating, and ensures reliable long-term cooling system performance.

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

982121049

The product you are viewing cross references to these numbers

Coolant Hose, Lower.
Ensure dependable cooling system performance with the Coolant Hose, Lower. This OE MATCH lower radiator hose is designed to carry coolant between the radiator and engine, supporting proper heat exchange and stable operating temperatures.

Fits:

• Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
• Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
• Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
• Porsche Cayman 718 2.0L Manual (300 Bhp)
• Porsche Cayman 718 2.0L PDK (300 Bhp)
• Porsche Cayman S 718 2.5L Manual (350 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman T 718 2.0L Manual (300 Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
• Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp)

  
Diagram Ref No 18

What This Product Does:

• Returns cooled coolant from the radiator to the engine
• Maintains continuous coolant circulation
• Helps regulate engine operating temperature
• Prevents overheating by supporting efficient heat exchange

Symptoms Of Wear Or Failure:

• Coolant leaking beneath the vehicle
• Engine overheating or fluctuating temperature gauge
  
• Low coolant warning light
• Frequent coolant top-offs
• Steam from under the hood
• Sweet coolant odor from the engine bay
  
• Cracks, splits, or visible deterioration in the hose
  
• Bulging or swelling, indicating internal weakening
  
• Soft, mushy, or brittle rubber texture
• Coolant residue around hose clamps or connection points

Why Replacement Matters:

• The lower coolant hose plays a critical role in returning cooled coolant from the radiator back to the engine. If this hose becomes worn, cracked, or weakened, it can lead to coolant leaks and reduced circulation.
• Failure to replace a damaged hose may result in overheating, engine performance issues, or costly repairs caused by coolant loss. Because the lower hose operates under constant heat and pressure, deterioration over time is normal.
• Replacing it at the first signs of wear helps maintain proper coolant flow, protects the engine from overheating, and ensures reliable long-term cooling system performance.

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

982121049

The product you are viewing cross references to these numbers

Coolant Hose, Upper.

Maintain optimal engine cooling performance with the Coolant Hose, Upper. This OEM-quality upper radiator hose is designed to transfer hot coolant from the engine to the radiator, where heat is dissipated to regulate operating temperature.

Fits:

• Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
• Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
• Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
• Porsche Cayman 718 2.0L Manual (300 Bhp)
• Porsche Cayman 718 2.0L PDK (300 Bhp)
• Porsche Cayman S 718 2.5L Manual (350 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman T 718 2.0L Manual (300 Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
• Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp)

  
Diagram Ref No 15 (Diagram Ref No 16 Included)

What This Product Does:

• Transfers hot coolant from the engine to the radiator
• Enables proper heat dissipation
• Maintains stable engine operating temperature
• Supports continuous coolant circulation

Symptoms Of Wear Or Failure:

• Coolant leaks near the radiator or engine bay
• Engine overheating or rising temperature gauge
  
• Low coolant warning light
• Frequent coolant loss requiring top-offs
  
• Steam from under the hood
• Sweet coolant smell from the engine compartment
  
• Cracks, splits, or dry rot on the hose surface
  
• Swelling or bulging due to internal weakening
  
• Soft, spongy, or brittle hose texture
• Coolant residue or wetness around hose clamps and fittings

Why Replacement Matters:

• The upper coolant hose is responsible for carrying hot coolant from the engine to the radiator for heat removal. If the hose becomes worn, cracked, or weakened, it can leak or fail under pressure, causing rapid coolant loss.
• A failed upper hose can quickly lead to engine overheating, which may result in serious damage such as warped components or head gasket failure. Because this hose operates under high heat and pressure, replacing it when signs of wear appear is essential for maintaining cooling system reliability.
• Replacing the hose helps restore proper coolant circulation, prevent leaks, and protect the engine from costly overheating-related repairs.

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

982121036C

The product you are viewing cross references to these numbers

Coolant Hose, Upper.

Maintain optimal engine cooling performance with the Coolant Hose, Upper. This OE MATCH upper radiator hose is designed to transfer hot coolant from the engine to the radiator, where heat is dissipated to regulate operating temperature.

Fits:

• Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
• Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
• Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
• Porsche Cayman 718 2.0L Manual (300 Bhp)
• Porsche Cayman 718 2.0L PDK (300 Bhp)
• Porsche Cayman S 718 2.5L Manual (350 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman T 718 2.0L Manual (300 Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
• Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp)

  
Diagram Ref No 15 (Diagram Ref No 16 Sold Separately)

What This Product Does:

• Transfers hot coolant from the engine to the radiator
• Enables proper heat dissipation
• Maintains stable engine operating temperature
• Supports continuous coolant circulation

Symptoms Of Wear Or Failure:

• Coolant leaks near the radiator or engine bay
• Engine overheating or rising temperature gauge
  
• Low coolant warning light
• Frequent coolant loss requiring top-offs
  
• Steam from under the hood
• Sweet coolant smell from the engine compartment
  
• Cracks, splits, or dry rot on the hose surface
  
• Swelling or bulging due to internal weakening
  
• Soft, spongy, or brittle hose texture
• Coolant residue or wetness around hose clamps and fittings

Why Replacement Matters:

• The upper coolant hose is responsible for carrying hot coolant from the engine to the radiator for heat removal. If the hose becomes worn, cracked, or weakened, it can leak or fail under pressure, causing rapid coolant loss.
• A failed upper hose can quickly lead to engine overheating, which may result in serious damage such as warped components or head gasket failure. Because this hose operates under high heat and pressure, replacing it when signs of wear appear is essential for maintaining cooling system reliability.
• Replacing the hose helps restore proper coolant circulation, prevent leaks, and protect the engine from costly overheating-related repairs.

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

982121036C

The product you are viewing cross references to these numbers