Hose Clips / Screws / Brackets and Fixings

Support bracket for breather pipes.



Fits:
Porsche 986 Boxster 1997-2004

Diagram ref no 24

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99610641200

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Support bracket for water coolant pipes. 2 per vehicle. Sold as each.



Fits:
Porsche 987 Boxster 2005-2008
Porsche 987C Cayman 2006-2008
Porsche 987.2 Boxster 2009-2012
Porsche 987C.2 Cayman 2009-2012
Porsche 996 Carrera / Turbo1998-2005 
Porsche 997.1 Carrera / Turbo / GT3 2005-2008
Porsche 997.2 Carrera / Turbo / GT3 2009-2012

Diagram ref no 23

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99710654002

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Water / Coolant pipe O-ring 22 x 3 mm
This Porsche Genuine OE O-Ring (Part No. 99970751741) is a precision-engineered sealing ring (22 x 3 mm) used within the engine cooling system, specifically at water/coolant pipe connections. It is commonly referred to as a coolant pipe O-ring, water inlet O-ring, or thermostat housing seal.
Sold individually

Fits:
O-Ring 99970751741 is widely used across multiple Porsche models, including:
Porsche 911 (997.2 / 991)
Porsche Boxster (987.2 / 981 / 982)
Porsche Cayman (987C.2 / 981C / 982C )
Porsche Cayenne (955 / 9YA)
Porsche Panamera (971 / 976)

Fitment / Position on car
•  Fitting position: Engine cooling system
•  Location: At coolant pipe joints / water inlet connections / thermostat housing
•  System: Engine cooling / coolant circulation

Cross Reference / Superseded Numbers: 99970751740 - replaced by 99970751741

The Porsche Genuine OE Coolant Pipe O-Ring 99970751741 is a small but essential sealing component used across many Porsche models. It ensures a leak-free connection within the cooling system, maintaining proper coolant flow, pressure, and engine temperature control. As a genuine Porsche part, it guarantees exact fitment and durability.

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99970751741

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Water / Coolant pipe O-ring 22 x 3 mm
This OE Match O-Ring (22 x 3 mm) is a high-quality replacement sealing component designed to meet original Porsche specifications for fit, durability, and performance. This O-ring is used within the engine cooling system, sealing coolant pipe connections to prevent leaks and maintain system pressure.
Sold individually

Fits:
O-Ring 99970751741 is widely used across multiple Porsche models, including:
Porsche 911 (997.2 / 991)
Porsche Boxster (987.2 / 981 / 982)
Porsche Cayman (987C.2 / 981C / 982C )
Porsche Cayenne (955 / 9YA)
Porsche Panamera (971 / 976)

This O-ring is commonly used across a wide range of Porsche models and is essential when removing or reinstalling coolant pipes, housings, or related components. As with all sealing elements, it should always be replaced during servicing to ensure optimal performance and prevent future leaks.

Fitment & Application:
•  Suitable for various Porsche models
•  Commonly used in engine cooling systems
•  Function: Prevents coolant leaks and maintains system pressure
•  Position: Coolant pipes / hose connections / housing joints
•  Size: 22 mm inner diameter x 3 mm thickness
•  Sold: Individually

Cross Reference / Superseded Numbers: 99970751740 - replaced by 99970751741

Coolant system O-rings are exposed to constant heat and chemical exposure, causing them to harden, crack, or lose elasticity over time. A failing seal can lead to coolant leaks, overheating, and potential engine damage. Replacing O-rings during servicing ensures proper sealing, prevents leaks, and maintains reliable cooling system operation.

When to replace
•  During coolant pipe or housing removal
•  Visible coolant leaks or residue
•  O-ring appears flattened, brittle, or cracked
•  Preventative replacement during cooling system service
•  After engine overheating incidents

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99970751741

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Water hose support bracket. 
Sold each.



Fits:
Porsche 986 Boxster  3.2L 1997-04
Porsche 996 Carrera 1998-04
Porsche 996 Turbo 2000-05
Porsche 996 GT3 1999-05
Porsche Carrera GT 2004-06

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

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99610641455

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Water rad hose clamp, small. 15 x 12.
Sold each.



Fits:
Porsche 986 Boxster 1997-05
Porsche 996 Carrera 1998-05

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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99951258509

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Water radiator hose clamp. 28 X 12mm.

Fits:
Porsche 986 Boxster 2.5L / 2.7L / S 3.2L 1997-04
Porsche 996 C2 / C4 / C4S 1998-05

Diagram Ref No 27.

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99951252201

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Water radiator hose clamp. 28 x 12.



Fits:
Porsche 986 Boxster 2.5L / 2.7L / S 3.2L 1997-04
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 996 Turbo 2001-05

Click 'Zoom in' for large parts diagram.
Diagram Ref No 27.

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99951255201

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Water radiator hose clamp, 32-50 mm
Genuine Porsche OE water radiator hose clamp, 32–50 mm, for Porsche 986 Boxster and 996 Carrera models. This original Porsche hose clamp is used in the engine cooling system to secure radiator and coolant hoses, helping maintain a tight, reliable connection between cooling system components.
Sold individually,

Fits:
Porsche 986 Boxster 2.5L / 2.7L / S 3.2L 1997 - 2004
Porsche 996 C2 / C4 / C4S 1998 - 2005

Diagram Ref No 10

Part number 99951249900 is a Genuine Porsche water radiator hose clamp, also listed as 999-512-499-00. It is a factory-style clamp with a 32–50 mm clamping range, used on selected Porsche coolant hose and radiator hose connections.

What This Part Does / Functions
•  Secures radiator and coolant hoses to pipe connections
•  Helps maintain a tight seal in the cooling system
•  Prevents coolant hose movement or disconnection under pressure
•  Helps reduce the risk of coolant leaks at hose joints
•  Maintains correct clamping force around the hose connection
•  Supports reliable coolant flow and cooling system pressure
•  Provides OE Porsche fitment for factory hose sizes and routing
•  Replaces corroded, weakened, damaged or incorrect hose clamps.

Why Replace This Part?
Radiator hose clamps are exposed to heat, coolant, moisture, road dirt and repeated expansion/contraction of the hose. Over time, the clamp can corrode, weaken, seize or lose its ability to hold the hose securely. Replacing an old or damaged clamp with a Genuine Porsche OE 32–50 mm hose clamp helps maintain proper hose sealing and reduces the risk of coolant leaks, pressure loss or overheating. It is good practice to replace hose clamps when removing or replacing coolant hoses.

When to Replace This Part
•  If the original clamp is corroded, rusty or seized
•  If coolant is leaking from a hose connection
•  If the clamp no longer tightens securely
•  During radiator hose or coolant hose replacement
•  During radiator, water pump, thermostat or coolant pipe repairs
•  If the hose has been removed and the clamp is no longer reusable
•  When replacing non-original or incorrectly sized clamps
•  During cooling system overhaul or preventative maintenance.

Where It Fits on the Car
This clamp fits in the engine cooling system, securing coolant/radiator hoses to pipes, radiator connections or related cooling system fittings.

 It may be used on upper, lower, inlet, outlet or water hose connections depending on model and cooling system layout. Exact position and quantity should be confirmed using the vehicle parts diagram.

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99951249900

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Water radiator hose clamp, 32-50 mm
This OE Match water radiator hose clamp is a replacement clamp for Porsche 986 Boxster and 996 Carrera C2, C4, and C4S models. It is designed for hose diameters within the 32–50 mm range and helps secure coolant hoses within the radiator and engine cooling system.

Fits:
Porsche 986 Boxster 2.5L / 2.7L / S 3.2L 1997 - 2004
Porsche 996 C2 / C4 / C4S 1998 - 2005

Diagram Ref No 10

The radiator hose clamp tightens around the coolant hose connection to help hold the hose firmly in place and maintain a leak-free seal. A correctly fitted hose clamp is essential for cooling system pressure retention, coolant flow, and reliable engine temperature control.

Functions
•  Secures coolant and radiator hoses to their connection points
•  Helps maintain a tight, leak-free hose seal
•  Supports correct cooling system pressure
•  Helps prevent coolant hose movement or detachment
•  Suitable for 32–50 mm hose applications
•  Replaces corroded, weak, damaged, or missing hose clamps
•  OE Match replacement for cooling system service and repair.

Why Replace This Part?
Radiator hose clamps can corrode, weaken, distort, seize, or lose clamping force over time due to heat, coolant exposure, vibration, and age. A worn or damaged clamp may allow coolant seepage, hose movement, pressure loss, or overheating issues. Replacing the clamp during coolant hose or radiator work helps restore a secure connection and dependable cooling system performance.

When to Replace This Part
•   The original clamp is rusty, corroded, seized, or damaged
•   Coolant is leaking around the hose connection
•   The clamp no longer tightens correctly
•   The coolant hose has been removed or replaced
•   The radiator, thermostat, water pump, or coolant pipes are being serviced
•   The hose connection shows signs of pressure loss or seepage
•   Preventative replacement is being carried out during cooling system maintenance.

Where it fits on the car
This clamp fits on coolant hose connections within the water radiator and engine cooling system on Porsche 986 Boxster and 996 C2, C4, and C4S models. It is used where a 32–50 mm hose clamp is specified.

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99951249900

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Water tube gasket, cyl 1-3.

Fits:
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4 2016
Porsche 991.1 Carrera 2012-16
Porsche 991.2 Carrera 2017-18
Porsche 991 Turbo 2014-18

Diagram ref no 13

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0PB121228B

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Water tube gasket, cyl 1-3.

Fits:
Porsche 987.2 Boxster 2009-12
Porsche 987C.2 Cayman 2009-12
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 997 GT3 2014-18

Diagram ref no 7

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0PB121228B

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Water tube gasket, cyl 4-6.

Fits:
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4 2016
Porsche 991.1 Carrera 2012-16
Porsche 991.2 Carrera 2017-18
Porsche 991 Turbo 2014-18

Diagram ref no 8

Water Tube Gasket is a genuine Porsche sealing gasket designed to provide a secure, leak-free seal between the engine's cooling system water tube connections. Manufactured to Porsche's exact specifications, this gasket ensures optimum coolant flow while preventing coolant leaks that could lead to overheating or reduced engine performance.

Made from high-quality, heat-resistant materials, this genuine gasket is engineered to withstand the demanding temperatures and pressures of modern Porsche cooling systems. Whether you're replacing a worn gasket during routine maintenance or carrying out cooling system repairs, using genuine Porsche components guarantees the correct fit, long-lasting durability, and dependable performance.

Replacing the water tube gasket whenever the cooling system is disassembled helps maintain cooling system integrity and protects your engine from coolant loss.

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0PB121327C

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Water tube gasket, cyl 4-6.

Fits:
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4 2016
Porsche 991.1 Carrera 2012-16
Porsche 991.2 Carrera 2017-18
Porsche 991 Turbo 2014-18

Diagram ref no 8

The Elring Water Tube Gasket is a premium-quality replacement for part number 0PB121327C, designed to provide a reliable, leak-free seal within your Porsche's engine cooling system. As one of the world's leading OEM gasket manufacturers, Elring is renowned for producing sealing solutions that meet or exceed original equipment standards.

Manufactured from high-quality, heat and coolant-resistant materials, this gasket ensures a precise fit and long-lasting performance under the demanding conditions of modern Porsche engines. It helps maintain correct coolant circulation while preventing leaks that could result in overheating or reduced engine efficiency.

Ideal for cooling system repairs or preventative maintenance, the Elring water tube gasket offers OEM-quality performance and durability, making it a trusted choice for professional workshops and Porsche enthusiasts alike.

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0PB121327C

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Water tube gasket, cyl 4-6.

Fits:
Porsche 987.2 Boxster 2009-12
Porsche 987C.2 Cayman 2009-12
Porsche 997.2 Carrera 2009-12
porsche 997.2 Turbo 2010-13
Porsche 997 GT3 2014-18

Diagram ref no 8

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0PB121327C

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Water tube gasket, cyl 4-6.

Fits:
Porsche 987.2 Boxster 2009-12
Porsche 987C.2 Cayman 2009-12
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 997 GT3 2014-18

Diagram ref no 8

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0PB121327C

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