Please wait… 
Please wait while we process your order,
do not press the back button…
do not press the back button…
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
Category Filter
Complimentary water hose. Porsche 996 2002-2005 - 99610685103
99610685103
Vehicle Group
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
Information
Complimentary water hose
Genuine Porsche OE complementary water hose for Porsche 996 Carrera 3.6L models from 2002–2005. This original Porsche coolant hose is designed to fit with the main water hose part number 99610685006 (old 99610685004 / 99610685001), helping complete the coolant hose connection within the engine bay cooling system.
Fits:
Porsche 996 Carrera / 4 / 4S 3.6L 2002 - 2005
Diagram ref no 47
What This Part Does / Functions
• Connects into the engine bay coolant hose system
• Complements the main water hose assembly 99610685006
• Helps route coolant correctly through the cooling circuit
• Supports proper coolant flow between connected cooling components
• Helps maintain cooling system pressure
• Replaces a cracked, split, swollen, hardened or leaking original hose
• Provides correct OE Porsche shape, length and connection fitment
• Supports reliable engine cooling system operation.
Why Replace This Part?
Coolant hoses are exposed to heat cycles, coolant pressure, vibration, engine movement and age-related rubber deterioration. Over time, a hose can harden, crack, swell, split or leak. A failing coolant hose can cause coolant loss, low coolant warnings, pressure loss or overheating. Replacing it with a Genuine Porsche OE complementary water hose helps restore correct coolant routing and factory fitment. When replacing the related main water hose 99610685006, it is recommended to check and replace this complementary hose if worn, aged or disturbed during service.
Common Symptoms of a Faulty Coolant Hose
• Coolant leak around the hose connection
• Dried coolant residue near the hose ends
• Low coolant warning
• Coolant smell from the engine bay
• Hose cracking, swelling or softening
• Cooling system pressure loss
• Overheating caused by coolant loss
• Hose damage found during water pump or coolant hose service.
When to Replace This Part
• When replacing the related water hose 99610685006
• If the original hose is cracked, swollen, split or hardened
• If coolant is leaking from the hose or connection point
• During cooling system overhaul or engine bay hose replacement
• When replacing water pump, coolant tank, return pipe or related cooling components
• If the hose has been contaminated by oil or coolant deposits
• When recommissioning a vehicle with unknown cooling system history
• When restoring the cooling system with correct Genuine Porsche parts.
Where It Fits on the Car
This hose fits in the engine bay coolant hose system on Porsche 996 Carrera 3.6L models. It is designed to work with hose 99610685006, which connects into the water pump / coolant pipework system. Correct routing and secure hose connections are important to prevent leaks and maintain cooling system performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610685103
The product you are viewing cross references to these numbers
Genuine Porsche OE complementary water hose for Porsche 996 Carrera 3.6L models from 2002–2005. This original Porsche coolant hose is designed to fit with the main water hose part number 99610685006 (old 99610685004 / 99610685001), helping complete the coolant hose connection within the engine bay cooling system.
Fits:
Porsche 996 Carrera / 4 / 4S 3.6L 2002 - 2005
Diagram ref no 47
What This Part Does / Functions
• Connects into the engine bay coolant hose system
• Complements the main water hose assembly 99610685006
• Helps route coolant correctly through the cooling circuit
• Supports proper coolant flow between connected cooling components
• Helps maintain cooling system pressure
• Replaces a cracked, split, swollen, hardened or leaking original hose
• Provides correct OE Porsche shape, length and connection fitment
• Supports reliable engine cooling system operation.
Why Replace This Part?
Coolant hoses are exposed to heat cycles, coolant pressure, vibration, engine movement and age-related rubber deterioration. Over time, a hose can harden, crack, swell, split or leak. A failing coolant hose can cause coolant loss, low coolant warnings, pressure loss or overheating. Replacing it with a Genuine Porsche OE complementary water hose helps restore correct coolant routing and factory fitment. When replacing the related main water hose 99610685006, it is recommended to check and replace this complementary hose if worn, aged or disturbed during service.
Common Symptoms of a Faulty Coolant Hose
• Coolant leak around the hose connection
• Dried coolant residue near the hose ends
• Low coolant warning
• Coolant smell from the engine bay
• Hose cracking, swelling or softening
• Cooling system pressure loss
• Overheating caused by coolant loss
• Hose damage found during water pump or coolant hose service.
When to Replace This Part
• When replacing the related water hose 99610685006
• If the original hose is cracked, swollen, split or hardened
• If coolant is leaking from the hose or connection point
• During cooling system overhaul or engine bay hose replacement
• When replacing water pump, coolant tank, return pipe or related cooling components
• If the hose has been contaminated by oil or coolant deposits
• When recommissioning a vehicle with unknown cooling system history
• When restoring the cooling system with correct Genuine Porsche parts.
Where It Fits on the Car
This hose fits in the engine bay coolant hose system on Porsche 996 Carrera 3.6L models. It is designed to work with hose 99610685006, which connects into the water pump / coolant pipework system. Correct routing and secure hose connections are important to prevent leaks and maintain cooling system performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610685103
99610685103
The product you are viewing cross references to these numbers
Price: £22.29
In stock
Related products
Vehicle Group
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 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 Carrera C4S 3.8L 2009-12
- Porsche 997 MKII Turbo 2010-13
Information
Cooling Water Tube - Return Line.
Fits:
Porsche 997 MKI Carrera All.
997 Carrera 2 3.6L 2005>>
997 Carrera 2S 3.8L 2005>>
997 Carrera 4 3.6L 2005>>
997 Carrera 4S 3.8L 2005>>
Porsche 997 MKI Turbo
Porsche 997 MKII Carrera All. 2009>>
997 Carrera 2 3.6L 2009>>
997 Carrera 2S 3.8L 2009>>
997 Carrera 4 3.6L 2009>>
997 Carrera 4S 3.8L 2009>>
Porsche 997 MKII Turbo 2009>>
Diagram Ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710680902
The product you are viewing cross references to these numbers
Fits:
Porsche 997 MKI Carrera All.
997 Carrera 2 3.6L 2005>>
997 Carrera 2S 3.8L 2005>>
997 Carrera 4 3.6L 2005>>
997 Carrera 4S 3.8L 2005>>
Porsche 997 MKI Turbo
Porsche 997 MKII Carrera All. 2009>>
997 Carrera 2 3.6L 2009>>
997 Carrera 2S 3.8L 2009>>
997 Carrera 4 3.6L 2009>>
997 Carrera 4S 3.8L 2009>>
Porsche 997 MKII Turbo 2009>>
Diagram Ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710680902
99710680901
99710680902
99710680900
The product you are viewing cross references to these numbers
Price: £119.16
In stock
Vehicle Group
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Information
Water Pump Inlet Hose. Runs from the upper left side of the engine bay to the water pump.
Fits:
Porsche 997 C2/C2S/C4/C4S 2005-08
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710685001
The product you are viewing cross references to these numbers
Fits:
Porsche 997 C2/C2S/C4/C4S 2005-08
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710685001
99710685001
The product you are viewing cross references to these numbers
Price: £145.45
Delayed delivery
Vehicle Group
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Information
Coolant Return Hose, Return hose at the thermostat housing.
This original Porsche coolant hose forms part of the engine cooling system, helping return coolant through the cooling circuit and maintain correct engine operating temperature.
Fits:
Porsche 997.1 C2 / C2S 2005 - 2008
Porsche 997.1 C4 / C4S 2005 - 2008
Diagram ref no 15
This hose is used in the water pump / thermostat housing area on selected Porsche 997.1 models.
What This Part Does / Functions:
• Routes coolant through the return side of the cooling system
• Connects at the thermostat housing area where specified
• Helps maintain correct coolant circulation and engine temperature control
• Supports proper cooling system pressure and flow
• Replaces a cracked, swollen, leaking or heat-damaged original hose
• Helps prevent coolant loss and overheating risk
• Provides correct Genuine Porsche hose shape, material and connection fitment
• Supports reliable factory cooling system performance.
Why Replace This Part?
Coolant hoses are exposed to heat cycles, coolant pressure, engine bay temperatures, vibration and age-related rubber deterioration. Over time, the hose can harden, swell, crack, split or leak. A failing coolant return hose may cause coolant loss, low coolant warnings, overheating risk or visible coolant residue around the thermostat housing.
Replacing it with a Genuine Porsche coolant return hose helps restore the correct factory coolant routing and reliable cooling system sealing.
Common Symptoms of a Faulty Coolant Return Hose
• Coolant leak around the thermostat housing
• Dried coolant residue around the hose connections
• Low coolant warning
• Coolant smell from the rear engine bay
• Engine temperature rising above normal
• Hose swelling, cracking or softening
• Cooling system pressure loss
• Damage found during cooling system inspection.
When to Replace This Part
• If the original hose is cracked, swollen, leaking or damaged
• During thermostat housing or water pump service
• During cooling system overhaul
• When replacing related coolant pipes, hoses or clamps
• If coolant loss is traced to the return hose
• After engine bay service where the hose has been disturbed
• If the hose has become brittle, soft or oil-contaminated
Where It Fits on the Car
This hose fits in the engine cooling / water cooling system at the thermostat housing area. It is identified as the coolant return hose / water hose return line and is shown in Porsche cooling diagrams as diagram reference no. 15.
Correct routing, clamp positioning and sealing are important to prevent coolant leaks and maintain proper cooling system operation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710683204
The product you are viewing cross references to these numbers
This original Porsche coolant hose forms part of the engine cooling system, helping return coolant through the cooling circuit and maintain correct engine operating temperature.
Fits:
Porsche 997.1 C2 / C2S 2005 - 2008
Porsche 997.1 C4 / C4S 2005 - 2008
Diagram ref no 15
This hose is used in the water pump / thermostat housing area on selected Porsche 997.1 models.
What This Part Does / Functions:
• Routes coolant through the return side of the cooling system
• Connects at the thermostat housing area where specified
• Helps maintain correct coolant circulation and engine temperature control
• Supports proper cooling system pressure and flow
• Replaces a cracked, swollen, leaking or heat-damaged original hose
• Helps prevent coolant loss and overheating risk
• Provides correct Genuine Porsche hose shape, material and connection fitment
• Supports reliable factory cooling system performance.
Why Replace This Part?
Coolant hoses are exposed to heat cycles, coolant pressure, engine bay temperatures, vibration and age-related rubber deterioration. Over time, the hose can harden, swell, crack, split or leak. A failing coolant return hose may cause coolant loss, low coolant warnings, overheating risk or visible coolant residue around the thermostat housing.
Replacing it with a Genuine Porsche coolant return hose helps restore the correct factory coolant routing and reliable cooling system sealing.
Common Symptoms of a Faulty Coolant Return Hose
• Coolant leak around the thermostat housing
• Dried coolant residue around the hose connections
• Low coolant warning
• Coolant smell from the rear engine bay
• Engine temperature rising above normal
• Hose swelling, cracking or softening
• Cooling system pressure loss
• Damage found during cooling system inspection.
When to Replace This Part
• If the original hose is cracked, swollen, leaking or damaged
• During thermostat housing or water pump service
• During cooling system overhaul
• When replacing related coolant pipes, hoses or clamps
• If coolant loss is traced to the return hose
• After engine bay service where the hose has been disturbed
• If the hose has become brittle, soft or oil-contaminated
Where It Fits on the Car
This hose fits in the engine cooling / water cooling system at the thermostat housing area. It is identified as the coolant return hose / water hose return line and is shown in Porsche cooling diagrams as diagram reference no. 15.
Correct routing, clamp positioning and sealing are important to prevent coolant leaks and maintain proper cooling system operation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710683204
99710683204
99710683203
The product you are viewing cross references to these numbers
Price: £70.07
In stock