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O-Ring, 19.6 X 3.53N. Porsche 957 / 958 Cayenne / 970 Panamera 2007-18 ❭ 99970182541
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
- Porsche 970.1 Panamera V6 3.6L 2WD 2009-13
- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
- Porsche 970.1 Panamera S V8 4.8L 2009-13
- Porsche 970.1 Panamera 4S V8 4.8L 2009-13
- Porsche 970.1 Panamera GTS V8 4.8L 2011-13
- Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
- Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
- Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
- Porsche 970.2 Panamera Turbo V8 4.8L (520Hp) 2014-16
- Porsche 970.2 Panamera Turbo V8 Executive 2014-16
- Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
O-Ring, 19.6 X 3.53N.
The O-Ring 19.6 x 3.53N is a genuine Porsche OEM sealing ring designed to create a tight, leak-free seal between coolant pipe connections and related engine cooling system components. Manufactured to precise dimensions, this O-ring fits into the mating groove of the pipe joint to prevent coolant loss and maintain correct system pressure. It is an essential replacement seal used on various Porsche coolant and inlet pipe applications.
Fits:
- Porsche 957 Cayenne S/GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
- Porsche 958 Cayenne S V8 4.8L Petrol 400HP 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol 400HP 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol 500HP 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol 550HP 2010-17
- Porsche 970.1 Panamera V6 3.6L 2WD 2009-13
- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
- Porsche 970.1 Panamera S V8 4.8L 2009-13
- Porsche 970.1 Panamera 4S V8 4.8L 2009-13
- Porsche 970.1 Panamera GTS V8 4.8L 2011-13
- Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
- Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
- Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
- Porsche 970.2 Panamera Turbo V8 4.8L (520Hp) 2014-16
- Porsche 970.2 Panamera Turbo V8 Executive 2014-16
- Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
Diagram Ref No 2
What This Product Does:
- Seals coolant pipe joints to prevent coolant leaks between connected pipes and fittings.
- Maintains correct cooling system pressure, which is essential for efficient engine temperature control.
- Creates a tight seal between metal components by compressing inside a groove when the pipe connection is tightened.
- Coolant may seep or drip from the joint where the O-ring seals the connection.
- A worn O-ring can cause slow coolant loss, leading to frequent topping up.
- Loss of coolant or system pressure can reduce cooling efficiency and contribute to overheating.
- A leaking O-ring often produces a noticeable coolant smell near the engine bay.
- The O-ring may show cracking, flattening (loss of shape), swelling, hardening or brittleness
- Modern Porsche models may trigger low coolant warnings if leakage occurs.
- Prevents coolant leaks at pipe connections, avoiding coolant loss and contamination.
- Maintains correct system pressure, which is essential for efficient engine cooling performance.
- Helps prevent engine overheating, since even a small leak can lead to low coolant levels and temperature rise.
- Protects surrounding components, as leaking coolant can damage hoses, sensors, connectors, and nearby engine parts.
- Ensures reliable long-term sealing, since old O-rings harden and flatten over time due to heat and pressure cycles.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970182541
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17

Fits:
Porsche 958 Cayenne 3.6L 2011-18
Click 'Zoom in' for large parts diagram.
Diagram ref no 37
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810636020
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17

Fits:
Porsche 958 Cayenne 3.6L 2011-18
8-speed auto. transmission for all-wheel drive (Option code: G1G)
Click 'Zoom in' for large parts diagram.
Diagram ref no 34
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810655020
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 970.2 Panamera Diesel V6 3.0L (250Hp) 2014-16
- Porsche 970.2 Panamera S E-Hybrid V6 3.0L (416Hp) 2014-16
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
This original Porsche coolant vent / breather line forms part of the engine cooling system, helping bleed air and route coolant vapour or coolant flow correctly through the cooling circuit.
Fits:
Porsche 958 Cayenne 3.6L 2011 - 2018
Porsche 95B.1 Macan 3.0L / 3.6L 2014 - 2018
Porsche 970.2 Panamera 3.0L 2013 - 2016
Diagram ref no 12
What This Part Does / Functions
• Helps vent air from the engine cooling system
• Routes coolant or coolant vapour through the correct cooling circuit path
• Supports proper coolant circulation and system bleeding
• Helps reduce the risk of trapped air pockets in the cooling system
• Assists stable engine operating temperature
• Replaces a cracked, brittle, leaking or damaged original vent line
• Provides correct OE Porsche routing, shape and connection fitment
• Supports reliable cooling system performance.
Why Replace This Part?
Coolant vent lines are exposed to heat cycles, coolant pressure, vibration and age-related plastic or rubber deterioration. Over time, the line can become brittle, crack, split or leak. A failed coolant vent line may cause coolant loss, coolant smell, low coolant warnings, pressure loss or overheating. Replacing it with a Genuine Porsche OE engine coolant vent line helps restore correct cooling system venting and factory fitment. This is especially important on Porsche V6 applications where the coolant vent line routing is critical to proper system bleeding and coolant circulation.
Common Symptoms of a Faulty Coolant Vent Line
• Coolant smell from the engine bay
• Visible coolant leak or dried coolant residue
• Low coolant warning
• Cooling system pressure loss
• Air trapped in the cooling system
• Engine temperature fluctuations
• Brittle, cracked or broken coolant line
• Coolant seepage after previous cooling system work.
When to Replace
• This Part If the original vent line is cracked, brittle, leaking or damaged
• If coolant loss is traced to the vent line
• During cooling system overhaul or hose replacement
• When replacing related coolant pipes, hoses or thermostat components
• If the cooling system is difficult to bleed correctly
• During intake manifold or engine-top service where the line is disturbed
• When recommissioning a vehicle with unknown cooling system history
Where It Fits on the Car
This coolant vent line fits in the engine cooling system, routed around the engine coolant pipework / breather circuit. It connects into the coolant venting system and helps remove air from the cooling circuit. Correct routing and secure connections are important to prevent leaks and maintain proper cooling system operation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94610602661
The product you are viewing cross references to these numbers
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