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Oil Tank & Parts
- 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
Fits:
Porsche 964 1989-94
Diagram Ref No 30
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96420713004
The product you are viewing cross references to these numbers
- 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
Fits:
Porsche 964 1989-94
Diagram Ref No 30
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96420713004
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 964 1989-94
Diagram Ref No 26.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96420721700
The product you are viewing cross references to these numbers
- 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
Fits:
Porsche 964 1989-94
Diagram Ref No 26
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96420721700
The product you are viewing cross references to these numbers
- 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
Fits:
Porsche 964 1989-94
*For cars with Thermostat Part Number:
96420704705
96420704307
96420704308
Diagram ref no 22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96420725103
The product you are viewing cross references to these numbers
- 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
Fits:
Porsche 964 1989-94
*For cars with Thermostat Part Number:
96420704705
96420704707
96420704708
Diagram ref no 22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96420725103
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- 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 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- 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 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Fits:
Porsche 911 1984 - 1989
Porsche 964 1989 - 1994
Porsche 924S 1986 - 1988
Porsche 928 1987 - 1995
Porsche 944 1985 - 1991
Porsche 968 1992 - 1995
Diagram ref no 12
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970184641
The product you are viewing cross references to these numbers
- 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
This Porsche Genuine OE Rubber Buffer is an original factory oil tank support mount designed for Porsche 911 (964) models from 1989–1994. This bonded rubber-metal buffer (mounting bush) is used to secure and support the engine oil tank to the vehicle body while isolating vibration.
Sold individually, Typically 2 required per vehicle
Fits:
Porsche 964 1989 - 1994
Diagram Ref No 2 or 3
The rubber buffer acts as a flexible mounting point between the oil tank and chassis, absorbing vibrations and movement generated by the engine and oil system. It ensures the oil tank remains securely positioned while preventing excessive stress on connected oil lines and fittings.
Functions & Technical Role
• Vibration isolation: Reduces transfer of engine vibrations to the chassis
• Component support: Secures the oil tank in position
• Stress reduction: Protects oil lines and connections from movement
• Noise damping: Minimises vibration-related noise
• OEM construction: Bonded rubber-metal design for durability and flexibility
Fitment / Position on car
• Fitting position: Engine / oil system mounting
• Location: Between engine oil tank and body/chassis mounting points
• System: Engine lubrication / oil tank support
Cross Reference / Superseded Numbers
• 99970332400 - replaced by 9997033240A
Over time, rubber mounts can harden, crack, or collapse, leading to:
• Increased vibration and noise
• Stress on oil tank and pipe connections
• Potential oil leaks or fatigue damage
• Reduced overall system stability
Replacing worn buffers with genuine Porsche OE parts restores proper mounting support and protects the oil system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9997033240A
The product you are viewing cross references to these numbers
- 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
This OE Match rubber buffer is a direct replacement for the original Porsche oil tank mounting support used in the 964 generation 911. Installed between the oil tank and the vehicle body, it acts as a flexible mounting point that securely holds the oil tank in position while absorbing vibration.
Sold individually, Typically 2 required per vehicle
Fits:
Porsche 964 1989 - 1994
Diagram Ref No 2 or 3
This rubber buffer supports the oil tank while isolating it from engine vibrations and chassis movement. It reduces stress on oil lines and surrounding components, helping maintain system integrity and preventing premature wear.
Function
• Supports and stabilises the engine oil tank
• Absorbs vibration between tank and chassis
• Reduces stress on oil lines and connections
• Prevents metal-to-metal contact
• Helps maintain correct positioning of oil system components
Over time, rubber mounts degrade due to heat, oil exposure, and age. A worn buffer can lead to increased vibration, stress on oil lines, and potential leaks. Replacing it restores proper isolation, protects the oil system, and helps maintain overall engine reliability.
When to replace
• Rubber shows cracking, splitting, or hardening
• Increased vibration or movement of oil tank
• During oil line or tank servicing
• Signs of oil system stress or misalignment
• As part of engine bay restoration or maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9997033240A
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 964 1989-94 (Not for Turbo 3.6L)
Diagram Ref No 1.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96420707005
The product you are viewing cross references to these numbers
- 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
Fits:
Porsche 964 Carrera 1989-94
Porsche 964 Carrera RS 1992-93
Porsche 964 Turbo 1991-94
Porsche 993 Carrera 1994-98
Porsche 993 Carrera RS 1995-96
Porsche 993 Turbo 1995-98
Diagram ref. 11.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90017406340
The product you are viewing cross references to these numbers
- 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
Fits:
Porsche 964 - 1991 to 1994
Oil tank breather vent line from the top of the oil tank
Diagram ref no 41
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96420731600
The product you are viewing cross references to these numbers
Oil Tanks & Parts – Precision Lubrication Storage for Porsche Performance
The engine oil tank is a vital component in Porsche’s dry-sump lubrication system, designed to store and manage oil separately from the crankcase. Unlike traditional wet-sump setups, this system ensures consistent oil pressure, efficient cooling, and superior lubrication under all driving conditions — from spirited road use to high-performance track sessions.
At Design911, we offer a wide range of engine oil tanks, fittings, and associated components for Porsche models, both classic and modern. Built from high-grade aluminium, steel, and corrosion-resistant materials, our products are designed for durability, temperature stability, and optimal oil management.
Whether you’re maintaining an air-cooled 911 or servicing a contemporary GT model, our oil tanks and parts guarantee the reliability and performance your engine deserves.
What Do Oil Tanks & Components Do?
The oil tank serves as the reservoir in a dry-sump lubrication system, allowing continuous oil flow to the engine while preventing aeration or starvation during hard acceleration, braking, or cornering.
Core Functions:
- Stores
and circulates oil independently from the engine block.
- Maintains
stable oil pressure and temperature for consistent lubrication.
- Prevents
oil starvation during high-performance driving.
- Aids
in cooling, helping regulate operating temperatures.
- Separates air and oil, preventing foaming and pressure loss.
Supporting components — such as oil tank fittings, caps, hoses, and mounts — ensure secure flow, sealing, and performance integrity across the entire lubrication circuit.
Why Do Oil Tanks & Parts Fail?
Over time, exposure to heat, pressure, and vibration can cause the oil tank and its associated components to degrade or leak, compromising the lubrication system.
Common Causes of Failure Include:
- Corrosion
or internal contamination from moisture or sludge build-up.
- Cracks
or punctures caused by vibration or impact.
- Oil
leaks from damaged seals, caps, or connections.
- Blockages
in breather or feed lines affecting oil circulation.
- Heat stress, leading to material fatigue or deformation.
Typical symptoms include oil leaks, fluctuating oil pressure, overheating, or unusual engine noise — all signs that inspection or replacement is required.
Why Replace Oil Tank Components?
Replacing a worn or leaking oil tank ensures your Porsche’s lubrication system remains efficient and protected. Our precision-engineered oil tanks and accessories are designed to deliver superior durability, sealing, and performance under high stress.
Key Benefits:
- Restores stable oil pressure and circulation.
- Prevents leaks and contamination.
- Enhances oil cooling efficiency and consistency.
- Constructed from corrosion-resistant, heat-stable materials.
- Direct-fit
compatibility with a wide range of Porsche engines.
- Ideal for restorations, rebuilds, and performance applications.
A properly maintained oil tank system is essential for ensuring engine longevity and reliability — particularly in performance and motorsport use.
Highlights:
- Precision-engineered Porsche oil tanks and associated components.
- Designed for consistent oil pressure and temperature control.
- Durable materials for heat and corrosion resistance.
- Direct-fit solutions for 911, Cayman, Boxster, GT models and more.
- Perfect for rebuilds, restorations, and performance upgrades.
- Ensures optimal lubrication and engine reliability.