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cap Genuine Porsche part 99970338740
• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.
Before purchasing thoroughly check part to confirm compatibility.
- We are unable to provide fitting details for this product at this time. Please contact us for further information.
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Cross Reference / Superseded Numbers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Related, superseded, cross reference or alternative numbers for comparison.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

Fits:
Porsche 911 1987-89
Porsche 964 1989-94
Porsche 993 1995-98
Click 'Zoom in' for large parts diagram
Diagram ref no 18
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9997033444001C
The product you are viewing cross references to these numbers
- 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 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 911 1987-89
Porsche 964 1989-94
Porsche 993 1995-98
Click 'Zoom in' for large parts diagram
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9997033454001C
The product you are viewing cross references to these numbers
- 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 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 1989-94
Porsche 993 1995-98
Click 'Zoom in' for large parts diagram.
Diagram ref no 22
Price if for each.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970336500
The product you are viewing cross references to these numbers
- 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 944 1985-91
Porsche 968 1992-95
Click 'Zoom in' for large parts diagram.
Diagram ref no 16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970334640
The product you are viewing cross references to these numbers
- 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
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
- Porsche 964 (911) TURBO 3.6L 1991-93
Sold each.

Fits:
Porsche 911 1974-79 (2 pcs per car)
Porsche 911 Turbo 1975-89 (3 pcs per car)
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970338401
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Sold each.

Fits:
Porsche 911 1974-79 (2 pcs per car)
Porsche 911 Turbo 1975-89 (3 pcs per car)
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970338401
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Sold each.

Fits:
Porsche 911 1978-86 (3 pcs per car)
Porsche 911 1987-89 (2 pcs per car)
Porsche 964 1989-94 (3 pcs per car)
Porsche 964 Turbo 1991-94 (2 pcs per car)
Porsche 993 1995-98 (3 pcs per car)
Porsche 993 Turbo 1995-98 (3 pcs per car)
Click 'Zoom in' for large parts diagram.
Diagram ref no 21 (911) / no 12 (964) / no 15, 16 (964 Turbo) / no 12 (993)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970338401
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- 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 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
Monday-Friday: 8.30am - 5.30pm (GMT)
Saturday: Closed
Sunday: Closed