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Complimentary water hose. Porsche 996 2002-2005 ❭ 99610685103
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
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
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16

Fits:
Porsche 991.1 Carrera 2012-16
Porsche 991.1 Turbo 2014-16
Porsche 991 GT3 2014>>
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99110683301
The product you are viewing cross references to these numbers
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16

Fits:
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981 Cayman GT4 2016
Porsche 991 GT3 / GT3 RS / R 2014-17
Click 'Zoom in' for large parts diagram.
Diagram ref no 13
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A110602631
The product you are viewing cross references to these numbers
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16

Fits:
Porsche 991.1 Carrera 2012-16
Porsche 991 Turbo 2014-20
Porsche 991 GT3 2014>>
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99110681304
The product you are viewing cross references to these numbers
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