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- Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
- Porsche 992.1 GT3 RS 4.0L 2022-24
The Porsche Breather Line 9GT301047A is a genuine Porsche replacement ventilation line used within the PDK transmission and clutch breather system on selected Porsche 911 GT3 applications.
Fits:
- Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
- Porsche 992.1 GT3 RS 4.0L 2022-24
Diagram Ref No 34
The line forms part of the gearbox ventilation arrangement, providing a controlled route for pressure equalisation as the transmission and clutch assembly heat up and cool down during operation.
Porsche catalogues the part for the 7-speed PDK transmission code CBG.91, where it is fitted as a single breather line within the transmission assembly.
Manufactured as a genuine Porsche component, it provides the correct dimensions, connections and routing for the original installation.
What This Product Does:
During operation, transmission components and lubricants become hot.
As temperature increases, the air and vapour inside the transmission housing expand. A properly functioning breather system allows these pressure changes to be managed without excessive internal pressure building inside the gearbox.
The breather line helps:
- Vent the PDK transmission and clutch housing correctly
- Allow internal pressure to equalise as temperatures change
- Route gearbox vapour through the intended ventilation path
- Prevent excessive pressure building inside the transmission
- Support correct operation of gearbox seals and gaskets
- Reduce the likelihood of oil being forced past sealing surfaces
- Maintain the original Porsche gearbox ventilation arrangement
Although it does not directly control gear selection or clutch engagement, it supports the environment in which these components operate.
Symptoms Of Wear Or Failure:
Breather lines can deteriorate through heat, vibration, age or physical damage.
Possible symptoms include:
- Visible cracking or splitting
- Hardened or brittle hose material
- Kinked or crushed tubing
- Loose connections
- Line becoming detached
- Oil mist around the breather connection
- Transmission oil residue around the gearbox
- Dampness around adjacent fittings
- Unusual oil seepage from gearbox seals
- Repeated transmission oil leaks with no obvious seal failure
- Contamination or debris blocking the breather line
- Damaged retaining clips or supports
Because this is a passive ventilation component, a failed line may not immediately trigger a dashboard warning.
Why Replacement Matters:
A damaged, disconnected or blocked breather line can interfere with the transmission's ability to manage internal pressure.
Continued operation with a defective breather may contribute to:
- Increased gearbox oil leakage
- Additional stress on transmission seals
- Oil contamination around surrounding components
- Loss of transmission lubricant
- Dirt or moisture entering the breather system
- Premature deterioration of associated seals
- Increased maintenance requirements
Replacing a failed line restores the intended ventilation route and helps maintain the transmission's designed operating environment.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9GT301047A
The product you are viewing cross references to these numbers
.jpg?width=197 "M14 Banjo Bolt with Various Applications. Porsche 911 / 964 / 993 / 924S / 944 / / 968 / 928 - PCG13400701, 90013400701, 90013400702")
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
M14 Banjo Bolt – Power Steering, Gearbox
Oil & Fuel Line Fitting
Sold each
This versatile banjo bolt is used to secure banjo fittings
across a range of systems, including power steering hoses, gearbox oil
pipes, and fuel lines, ensuring a strong, leak-free connection under
pressure.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928 4.5L 1978-82
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
Diagram ref no 39
Engineered to OEM specifications, it delivers precise fitment and reliable sealing performance, making it an essential component for maintaining fluid system integrity across hydraulic, lubrication, and fuel systems. Ideal for servicing, repair, or restoration of both classic and modern Porsche models.
Key Features
• M14 banjo bolt for multiple Porsche applications
• Suitable for power steering, gearbox oil, and fuel systems
• Compatible with 911, 964, 924S, 928, and 944 models
• Designed for high-pressure fluid systems
• Ensures secure, leak-free connections
• OEM-style fit and specification
• Durable construction for long-term reliability
Function and Purpose
This banjo bolt is a critical fastening component used across several vehicle systems.
It helps to:
• Secure banjo fittings to power steering hoses
• Connect gearbox oil pipes for lubrication systems
• Fasten fuel line connections within the fuel system
• Maintain proper sealing under pressure
• Ensure consistent fluid flow and system efficiency
Why Replace Banjo Bolts
Over time, banjo bolts can degrade due to heat, pressure, and fluid exposure.
Common issues include:
• Fluid leaks (oil, fuel, or hydraulic fluid)
• Thread wear or stripping
• Corrosion from long-term use
• Reduced sealing efficiency
Replacing worn bolts ensures safe operation and maintains performance across multiple systems.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG13400701
The product you are viewing cross references to these numbers
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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
M14 Banjo Bolt – Power Steering, Gearbox
Oil & Fuel Line Fitting
Sold each
This versatile banjo bolt is used to secure banjo fittings
across a range of systems, including power steering hoses, gearbox oil
pipes, and fuel lines, ensuring a strong, leak-free connection under
pressure.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928 4.5L 1978-82
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
Diagram ref no 39
Engineered to OEM specifications, it delivers precise fitment and reliable sealing performance, making it an essential component for maintaining fluid system integrity across hydraulic, lubrication, and fuel systems. Ideal for servicing, repair, or restoration of both classic and modern Porsche models.
Key Features
• M14 banjo bolt for multiple Porsche applications
• Suitable for power steering, gearbox oil, and fuel systems
• Compatible with 911, 964, 924S, 928, and 944 models
• Designed for high-pressure fluid systems
• Ensures secure, leak-free connections
• OEM-style fit and specification
• Durable construction for long-term reliability
Function and Purpose
This banjo bolt is a critical fastening component used across several vehicle systems.
It helps to:
• Secure banjo fittings to power steering hoses
• Connect gearbox oil pipes for lubrication systems
• Fasten fuel line connections within the fuel system
• Maintain proper sealing under pressure
• Ensure consistent fluid flow and system efficiency
Why Replace Banjo Bolts
Over time, banjo bolts can degrade due to heat, pressure, and fluid exposure.
Common issues include:
• Fluid leaks (oil, fuel, or hydraulic fluid)
• Thread wear or stripping
• Corrosion from long-term use
• Reduced sealing efficiency
Replacing worn bolts ensures safe operation and maintains performance across multiple systems.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG13400701
The product you are viewing cross references to these numbers