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Engine Block Hoses
By OE Match
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
- 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 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 970.1 Panamera Diesel V6 3.0L 2011-13
- Porsche 970.1 Panamera S Hybrid V6 3.0L 2011-13
- 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 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 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
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
O-Ring – 11 x 2.5mm Water Coolant Breather
Line
Sold each
Ensure a reliable, leak-free cooling system with this OE
Match O-Ring, measuring 11 x 2.5mm.
Designed as a direct replacement for the original seal used on the water
coolant breather line.
Fits:
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
- 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 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 970.1 Panamera Diesel V6 3.0L 2011-13
- Porsche 970.1 Panamera S Hybrid V6 3.0L 2011-13
- 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 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 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
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
Diagram ref no 12
Although small, this sealing ring plays a vital role in maintaining the integrity of the cooling system. It creates a watertight seal between the breather line and its mating components, preventing coolant leaks while allowing the cooling system to maintain the correct operating pressure. Replacing ageing or damaged O-rings during cooling system maintenance helps prevent coolant loss, overheating and expensive engine repairs.
Manufactured from high-quality, coolant-resistant elastomer, this OE Match O-ring is designed to match the dimensions and performance of the original Porsche component for dependable long-term sealing.
What Does the Water Coolant Breather Line O-Ring Do?
The coolant breather line O-ring seals the connection between coolant pipes and breather line fittings within the engine's cooling system.
Its functions include:
- Preventing coolant leaks.
- Maintaining cooling system pressure.
- Ensuring efficient coolant circulation.
- Preventing air from entering the cooling system.
- Supporting correct engine operating temperatures.
- Helping maximise cooling system efficiency.
A correctly sealing O-ring is essential for maintaining the performance and reliability of the engine cooling system.
Why Does the O-Ring Need Replacing?
Over time, coolant seals are subjected to constant temperature fluctuations and coolant exposure, causing them to deteriorate.
Common causes of failure include:
- Heat cycling.
- Age-related hardening.
- Loss of elasticity.
- Coolant chemical degradation.
- Damage during removal.
- Compression set after years of service.
- Cooling system repairs requiring seal replacement.
As with most sealing components, O-rings should always be replaced once removed.
Symptoms of a Failing Coolant Breather Line O-Ring
Signs of a worn or damaged seal include:
- Coolant leaks around the breather line.
- Pink, white or dried coolant residue.
- Low coolant warning messages.
- Frequent coolant top-ups.
- Sweet coolant smell from the engine bay.
- Reduced cooling system pressure.
- Small coolant drips after driving.
Replacing the O-ring at the first sign of leakage helps prevent overheating and further cooling system damage.
When Should the O-Ring Be Replaced?
Replacement is recommended whenever:
- The coolant breather pipe is removed.
- Cooling system components are replaced.
- A coolant leak is diagnosed.
- Carrying out thermostat or water pump repairs.
- Performing preventative cooling system maintenance.
- Rebuilding or servicing the engine.
Installing a new O-ring during reassembly ensures a reliable seal and reduces the risk of future coolant leaks.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970758640
The product you are viewing cross references to these numbers
.jpg?width=197 "Water Coolant Hose. Porsche 95B.1 Macan 2.0L 2014-18 - 95B121056 - 69355")
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
The OE Match Water Coolant Hose is a high-quality replacement cooling system component designed to transport engine coolant between key cooling system components while maintaining a sealed, pressurised circuit. Manufactured to OE specifications for fit, flexibility and durability, this coolant hose ensures efficient coolant circulation to help maintain the correct engine operating temperature under all driving conditions.
Fits:
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
Diagram Ref No 22
Constructed from premium-quality reinforced rubber with heat- and pressure-resistant materials, the hose is engineered to withstand continuous exposure to hot coolant, engine vibration and fluctuating operating pressures. Precision-moulded to match the original routing and connection points, it provides secure installation and reliable leak-free performance.
What This Product Does:
Symptoms Of Wear Or Failure:
- Coolant leaks around the hose or hose connections.
- Low coolant level warnings.Engine overheating.
- Cracks, splits or perishing of the hose material.
- Swollen, soft or excessively hardened hose sections.
- Coolant odour from the engine bay.
- White or coloured coolant residue around the hose.
- Bulging or collapsed hose under pressure.
- Steam escaping from the engine compartment.
- Reduced heater performance due to coolant loss or restricted flow.
Why Replacement Matters:
- Coolant hoses operate under constant pressure and are continually exposed to high temperatures, engine vibration, coolant chemicals and environmental ageing. Over time, the rubber material can harden, crack, swell or lose its structural integrity, increasing the risk of coolant leaks or sudden hose failure.
- A failed coolant hose can rapidly reduce coolant levels and compromise the engine's ability to regulate temperature. Continued driving with insufficient coolant circulation may result in severe engine overheating, potentially causing warped cylinder heads, head gasket failure and costly internal engine damage.
- Replacing a worn or damaged coolant hose restores reliable coolant circulation and maintains the integrity of the engine cooling system. An OE Match replacement provides factory-style fitment, dependable sealing performance and long-lasting durability, helping preserve the performance, efficiency and reliability expected from your Porsche.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95B121056
The product you are viewing cross references to these numbers
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
Radiator hoses have an important job to transport your engines coolant to and from its cooling system components. Over time they can become dry, hard, brittle, or leak which warrants a replacement. When replacing we also recommend a coolant flush and replacement to remove any possible sludge formed over time.
Engine Coolant Hose Failure SymptomsCracking - Leaking - Swelling - Deterioration
Fits:
Porsche 95B.1 Macan 2.0ltr - 2014 to 2018
Diagram ref no 12
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95B121049E
The product you are viewing cross references to these numbers
OEMatch Engine Block Hoses — Durability, Sealing, Performance
OEMatch engine block hoses for Porsche models are designed as compatible, application-focused replacements that help maintain cooling system integrity and temperature control. These hoses are specified for the connections between the engine block, radiator and heater circuit and are intended to resist heat and fluid exposure while preserving routing and mounting clearances. OEMatch components are a practical option when genuine or OEM items are unavailable.
Available Types
- Engine block coolant hoses for front-engine Porsche models
- Radiator inlet and outlet hoses
- Heater hoses and bypass connections
- Replacement clamps, connectors and intermediate hoses
Understanding OEMatch Engine Block Hoses
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original engine block hoses. OE (Original Equipment) refers to parts matching original specifications for the engine block hoses and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM engine block hoses engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. Engine block hoses circulate coolant through the engine’s cooling circuit, carrying fluid between the water pump, radiator and heater core to regulate temperature, maintain system pressure and reduce the risk of overheating. Proper routing and material selection are important to avoid chafing, heat soak and premature softening.
Benefits Include
- Restored coolant circulation and improved temperature control
- Reduced risk of leaks at hose joints and clamps
- Heat-resistant materials to limit premature ageing
- Preserves original routing and mounting clearances
Why Engine Block Hoses Wear and Fail
- Heat-induced rubber ageing and hardening over time
- Chemical degradation from coolant additives or contamination
- Mechanical abrasion caused by contact with adjacent components
- Clamp or connector failure allowing leaks under pressure
The Importance of Replacing with OEMatch Engine Block Hoses
Replacing tired or damaged engine block hoses prevents coolant loss, overheating and secondary faults such as gasket failure or warped components. For Porsche models, correct hose length, diameter and bend radius help maintain coolant flow and avoid stress at joints. Choosing the right replacement hose maintains system pressure and routing, reducing the chance of repeat failures and supporting long-term reliability.
Advantages
- Materials chosen for heat and fluid resistance
- Manufactured to match original dimensions and routing
- Supplies include common connection fittings and clamps
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified; check for correct routing, secure clamps and any nearby heat sources before returning the vehicle to service.
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