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Coolant Hose, Lower. Porsche 982 Boxster / Cayman 2017>> ❭ 982121049
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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:
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- 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)
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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Related, superseded, cross reference or alternative numbers for comparison.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
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005

Fits:
Porsche 996 C2 / C4 1998-05 TIPTRONIC
Porsche 986 Boxster 2.5L / 2.7L 1997-04 TIPTRONIC
Porsche 986 Boxster S 3.2L
This product supersedes Porsche's old part numbers:
- 99610666555
- 99610666557
Click picture for large parts diagram.
Diagram Ref No 8.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610666558
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster 986 2.7L 2003-04

Fits:
Porsche 986 Boxster 2.5L / 2.7L 1997-04 (NOT 3.2L S) MANUAL
This product supersedes Porsche's old part numbers:
- 99610662101
Click 'Zoom in' for large parts diagram.
Diagram Ref No 8.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610662102
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005

Fits:
Porsche 996 C2 / C4 1998-05 MANUAL (NOT C4S)
This product supersedes Porsche's old part numbers:
- 99610662157
Click 'Zoom in' for large parts diagram.
Diagram ref no 8.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610662158
The product you are viewing cross references to these numbers
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