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Porsche // Boxster 986/987/981 (1997-2016) // Boxster 987 S 3.2/3.4L 2005-08/08
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Water radiator top hose intake top, LEFT. Porsche 996 Tiptronic / 986 Tiptronic / 986 S 3.2L - 99610666558
99610666558/1
Vehicle Group
- 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
Information
Water radiator top hose, Intake (Upper Left).
OE Match upper-left radiator coolant hose (intake/top hose) designed to replicate the factory hose routing and connections on Tiptronic-equipped 996 and 986 models.
Fits:
Porsche 996 C2 / C4 1998 - 2005 TIPTRONIC
Porsche 986 Boxster 2.5L / 2.7L 1997 - 2004 TIPTRONIC
Porsche 986 Boxster S 3.2L 2000 – 2004
This product supersedes Porsche's old part numbers:
- 99610666555
- 99610666557
Diagram Ref No 8.
This hose transports coolant through the upper (intake) side of the left radiator circuit, supporting efficient heat rejection and stable engine operating temperature.
Function: This hose links the radiator coolant plumbing on the upper-left side and is shaped to maintain correct flow while clearing bodywork, brackets, and neighbouring hoses. Correct fitment is important to prevent restriction, rubbing, and leak paths at the hose ends as the system expands and contracts with temperature.
Cooling hoses are wear items. A weakened upper hose can split or leak under pressure, leading to coolant loss and overheating risk. Replacing with an OE Match hose restores secure sealing and correct routing, helping protect the engine and keep the cooling system operating as intended.
When to replace:
• Visible coolant seepage at hose ends or along the hose body
• Hose feels overly soft, swollen, brittle, or cracked
• Coolant smell/steam from the front of the car
• Cooling system refresh (radiators/thermostat/water pump service)
• Preventatively on higher-mileage 996/986 models
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610666558
The product you are viewing cross references to these numbers
OE Match upper-left radiator coolant hose (intake/top hose) designed to replicate the factory hose routing and connections on Tiptronic-equipped 996 and 986 models.
Fits:
Porsche 996 C2 / C4 1998 - 2005 TIPTRONIC
Porsche 986 Boxster 2.5L / 2.7L 1997 - 2004 TIPTRONIC
Porsche 986 Boxster S 3.2L 2000 – 2004
This product supersedes Porsche's old part numbers:
- 99610666555
- 99610666557
Diagram Ref No 8.
This hose transports coolant through the upper (intake) side of the left radiator circuit, supporting efficient heat rejection and stable engine operating temperature.
Function: This hose links the radiator coolant plumbing on the upper-left side and is shaped to maintain correct flow while clearing bodywork, brackets, and neighbouring hoses. Correct fitment is important to prevent restriction, rubbing, and leak paths at the hose ends as the system expands and contracts with temperature.
Cooling hoses are wear items. A weakened upper hose can split or leak under pressure, leading to coolant loss and overheating risk. Replacing with an OE Match hose restores secure sealing and correct routing, helping protect the engine and keep the cooling system operating as intended.
When to replace:
• Visible coolant seepage at hose ends or along the hose body
• Hose feels overly soft, swollen, brittle, or cracked
• Coolant smell/steam from the front of the car
• Cooling system refresh (radiators/thermostat/water pump service)
• Preventatively on higher-mileage 996/986 models
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610666558
99610666557
99610666558
99610666555
The product you are viewing cross references to these numbers
Price: £29.00
In stock
Related products
Vehicle Group
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Information
Coolant top hose - RIGHT. Return line.
Fits:
Porsche 987 Boxster / S MKI & MKII 2005>>
Porsche 987C Cayman / S MKI & MKII 2006>>
Porsche 997 GT3 2007-2010
Porsche 997 Carrera 2/2S MKI & MKII 2005>> CABRIO/COUPE
This product supersedes Porsche's old part numbers:
- 99710662603
- 99710662604
Click "Zoom in" to see the diagram.
Diagram ref no 10.
Fits:
Porsche 987 Boxster / S MKI & MKII 2005>>
Porsche 987C Cayman / S MKI & MKII 2006>>
Porsche 997 GT3 2007-2010
Porsche 997 Carrera 2/2S MKI & MKII 2005>> CABRIO/COUPE
This product supersedes Porsche's old part numbers:
- 99710662603
- 99710662604
Click "Zoom in" to see the diagram.
Diagram ref no 10.
Price: £42.27
In stock
Vehicle Group
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Information
Coolant Top Hose - LEFT. Return Line.
Fits:
Porsche 987 Boxster / S MKI & MKII 2005>>
Porsche 987C Cayman / S MKI & MKII 2006>>
Porsche 997 GT3 2007-2010
Porsche 997 Carrera 2/2S MKI & MKII 2005>> CABRIO/COUPE
This product supersedes Porsche's old part numbers:
- 99710662503
Click "Zoom in" to see the diagram.
Diagram ref no 10.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710662504
The product you are viewing cross references to these numbers
Fits:
Porsche 987 Boxster / S MKI & MKII 2005>>
Porsche 987C Cayman / S MKI & MKII 2006>>
Porsche 997 GT3 2007-2010
Porsche 997 Carrera 2/2S MKI & MKII 2005>> CABRIO/COUPE
This product supersedes Porsche's old part numbers:
- 99710662503
Click "Zoom in" to see the diagram.
Diagram ref no 10.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710662504
99710662504
99710662503
The product you are viewing cross references to these numbers
Price: £39.49
In stock
Vehicle Group
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Information
Coolant Bottom Hose Supply - RIGHT.
Fits:
Porsche 987 Boxster / S MKI & MKII 2005>>
Porsche 987C Cayman / S MKI & MKII 2006>>
Porsche 997 GT3 2007-2010
Porsche 997 Carrera 2/2S MKI & MKII 2005>> CABRIO/COUPE
This product supersedes Porsche's old part numbers:
- 997 106 622 03
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710662204
The product you are viewing cross references to these numbers
Fits:
Porsche 987 Boxster / S MKI & MKII 2005>>
Porsche 987C Cayman / S MKI & MKII 2006>>
Porsche 997 GT3 2007-2010
Porsche 997 Carrera 2/2S MKI & MKII 2005>> CABRIO/COUPE
This product supersedes Porsche's old part numbers:
- 997 106 622 03
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710662204
99710662204
99710662203
The product you are viewing cross references to these numbers
Price: £36.96
In stock
Vehicle Group
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Information
Coolant Bottom Hose Supply LEFT.
Connects from the engine coolant supply line to the left side radiator.
Fits:
Porsche 987.1 Boxster / S 2005 - 2008
Porsche 987.2 Boxster / S 2009 - 2012
Porsche 987C.1 Cayman / S 2006 - 2008
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710662105
The product you are viewing cross references to these numbers
Connects from the engine coolant supply line to the left side radiator.
Fits:
Porsche 987.1 Boxster / S 2005 - 2008
Porsche 987.2 Boxster / S 2009 - 2012
Porsche 987C.1 Cayman / S 2006 - 2008
Porsche 987C.2 Cayman / S 2009 - 2012
Porsche 997 GT3 2007-2010
Porsche 997.1 Carrera 2 / 2S 2005 - 2008 CABRIO/COUPE
Porsche 997.2 Carrera 2 / 2S 2009 - 2010 CABRIO/COUPE
This product supersedes Porsche's old part numbers:
- 99710662103
Diagram ref no 9.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710662105
99710662105
99710662103
99710662104
The product you are viewing cross references to these numbers
Price: £43.42
In stock