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Porsche // Macan (95B) MK1 (2014-2018) // 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
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Crankshaft Main Bearing O-Ring, 51x 4.5. Porsche 911 78-89 / 964 / 993 / 996 Turbo / 997 Turbo / GT3 - 99970728541
99970728541/1
Vehicle Group
- 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
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
Information
Crankshaft Main Bearing O-Ring, 51x 4.5
This OE Match crankshaft main bearing O-ring is a replacement sealing ring for Porsche 911 1978–1989, 964, 993, 996 Turbo, 997 Turbo, and GT3 models. Measuring 51 x 4.5, it is designed to match the original-style fitment and sealing function within the crankshaft / main bearing area.
Sold individually
Fits:
Porsche 911 1978 - 1989
Porsche 964 1989 - 1994
Porsche 993 1995 - 1998
Porsche 996 Turbo 3.6L 2001 - 2005
Porsche 996 GT3 3.6L 1999 - 2005
Porsche 997.1 Turbo 3.6L 2007 - 2009
Porsche 997.2 Turbo 3.6L 2010 - 2013
Porsche 997 GT3 3.6L / 3.8L / 4.0L 2007 - 2011
Diagram ref no 21
The crankshaft main bearing O-ring helps seal the relevant bearing or housing connection to prevent oil leakage and maintain correct engine oil sealing. A properly sealing O-ring is essential for protecting engine components and maintaining oil system integrity.
What This Part Does / Functions
• Replaces the crankshaft main bearing
• O-ring Helps seal the crankshaft / main bearing housing area
• Supports correct engine oil sealing
• Helps prevent oil leaks from aged or flattened seals
• Suitable for engine rebuild, crankshaft, or bearing service
• Replaces hardened, cracked, flattened, swollen, or damaged O-rings
• OE Match replacement for Porsche engine sealing repair.
Why Replace This Part?
O-rings can harden, flatten, crack, swell, or lose sealing ability due to heat, age, oil exposure, pressure, and engine service work. A worn or damaged crankshaft main bearing O-ring may allow oil seepage or leakage, affecting engine cleanliness and oil system reliability. Replacement is recommended whenever the related engine components are removed or when oil leakage is present.
When to Replace This Part
• Engine rebuild or major engine service is being carried out
• Crankshaft or main bearing components are being serviced
• Oil leakage is present around the related sealing area
• The original O-ring is hardened, flattened, cracked, or damaged
• Bearing housing or crankshaft sealing components have been removed
• Preventative replacement is required during engine assembly
• The vehicle is undergoing Porsche engine restoration
Where it fits on the car
This O-ring fits within the engine crankshaft / main bearing sealing area. Exact position can vary depending on engine type and model-specific crankcase layout.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970728541
The product you are viewing cross references to these numbers
This OE Match crankshaft main bearing O-ring is a replacement sealing ring for Porsche 911 1978–1989, 964, 993, 996 Turbo, 997 Turbo, and GT3 models. Measuring 51 x 4.5, it is designed to match the original-style fitment and sealing function within the crankshaft / main bearing area.
Sold individually
Fits:
Porsche 911 1978 - 1989
Porsche 964 1989 - 1994
Porsche 993 1995 - 1998
Porsche 996 Turbo 3.6L 2001 - 2005
Porsche 996 GT3 3.6L 1999 - 2005
Porsche 997.1 Turbo 3.6L 2007 - 2009
Porsche 997.2 Turbo 3.6L 2010 - 2013
Porsche 997 GT3 3.6L / 3.8L / 4.0L 2007 - 2011
Diagram ref no 21
The crankshaft main bearing O-ring helps seal the relevant bearing or housing connection to prevent oil leakage and maintain correct engine oil sealing. A properly sealing O-ring is essential for protecting engine components and maintaining oil system integrity.
What This Part Does / Functions
• Replaces the crankshaft main bearing
• O-ring Helps seal the crankshaft / main bearing housing area
• Supports correct engine oil sealing
• Helps prevent oil leaks from aged or flattened seals
• Suitable for engine rebuild, crankshaft, or bearing service
• Replaces hardened, cracked, flattened, swollen, or damaged O-rings
• OE Match replacement for Porsche engine sealing repair.
Why Replace This Part?
O-rings can harden, flatten, crack, swell, or lose sealing ability due to heat, age, oil exposure, pressure, and engine service work. A worn or damaged crankshaft main bearing O-ring may allow oil seepage or leakage, affecting engine cleanliness and oil system reliability. Replacement is recommended whenever the related engine components are removed or when oil leakage is present.
When to Replace This Part
• Engine rebuild or major engine service is being carried out
• Crankshaft or main bearing components are being serviced
• Oil leakage is present around the related sealing area
• The original O-ring is hardened, flattened, cracked, or damaged
• Bearing housing or crankshaft sealing components have been removed
• Preventative replacement is required during engine assembly
• The vehicle is undergoing Porsche engine restoration
Where it fits on the car
This O-ring fits within the engine crankshaft / main bearing sealing area. Exact position can vary depending on engine type and model-specific crankcase layout.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970728541
99970146740
99970728540
99970728541
The product you are viewing cross references to these numbers
Price: £5.50
In stock
Related products
Vehicle Group
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.3 Macan Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan T Petrol 2.0L (265Bhp) 2022>>
Information
Crankshaft seal with flange.
This is a genuine OE crankshaft seal used in modern Porsche engines. It is designed to seal the crankshaft at the rear of the engine block, preventing oil leaks while allowing the crankshaft to rotate freely.
Fits:
Porsche 95B.1 Macan 2.0L 2015 - 2018
Porsche 95B.2 Macan 2.0L 2019 - 2021
Porsche 95B.3 Macan 2.0L 2022>>
* option code: T2G - 4-cylinder SI engine 2.0 l unit 06L.D
Porsche 9YA Cayenne 2.0L 01/2017 - 05/2023
* engine code: DFKA / DFK
Diagram ref no 16
What this product does:
• Provides a tight seal around the crankshaft flange
• Prevents engine oil leaks that could reduce lubrication or cause damage
• Maintains proper oil pressure and long-term engine performance
Location: Rear of the engine, surrounding the crankshaft flange, positioned before the flywheel or flexplate
Over time, crankshaft seals can wear out, harden, or crack due to constant rotation, oil exposure, and engine heat. Failure may result in:
• Oil leaks at the rear of the engine Reduced lubrication and risk of internal engine wear
• Oil contamination of clutch or transmission components
Replacing seal ensures proper sealing, protects against costly oil leaks, and keeps your Porsche engine performing as designed.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A7103171
The product you are viewing cross references to these numbers
This is a genuine OE crankshaft seal used in modern Porsche engines. It is designed to seal the crankshaft at the rear of the engine block, preventing oil leaks while allowing the crankshaft to rotate freely.
Fits:
Porsche 95B.1 Macan 2.0L 2015 - 2018
Porsche 95B.2 Macan 2.0L 2019 - 2021
Porsche 95B.3 Macan 2.0L 2022>>
* option code: T2G - 4-cylinder SI engine 2.0 l unit 06L.D
Porsche 9YA Cayenne 2.0L 01/2017 - 05/2023
* engine code: DFKA / DFK
Diagram ref no 16
What this product does:
• Provides a tight seal around the crankshaft flange
• Prevents engine oil leaks that could reduce lubrication or cause damage
• Maintains proper oil pressure and long-term engine performance
Location: Rear of the engine, surrounding the crankshaft flange, positioned before the flywheel or flexplate
Over time, crankshaft seals can wear out, harden, or crack due to constant rotation, oil exposure, and engine heat. Failure may result in:
• Oil leaks at the rear of the engine Reduced lubrication and risk of internal engine wear
• Oil contamination of clutch or transmission components
Replacing seal ensures proper sealing, protects against costly oil leaks, and keeps your Porsche engine performing as designed.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A7103171
95810317110
95810317100
9A7103171
The product you are viewing cross references to these numbers
Price: £179.35
Orderable
Vehicle Group
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.3 Macan Petrol 2.0L (265Bhp) 2022>>
- Porsche 95B.3 Macan T Petrol 2.0L (265Bhp) 2022>>
Information
Crankshaft seal with flange.
Fits:
Porsche 95B.1 Macan 2.0L 2015 - 2018
Porsche 95B.2 Macan 2.0L 2019 - 2021
Porsche 95B.3 Macan 2.0L 2022>>
* option code: T2G - 4-cylinder SI engine 2.0 l unit 06L.D
Porsche 9YA Cayenne 2.0L 01/2017 - 05/2023
* engine code: DFKA / DFK
Diagram ref no 16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A7103171
The product you are viewing cross references to these numbers
Fits:
Porsche 95B.1 Macan 2.0L 2015 - 2018
Porsche 95B.2 Macan 2.0L 2019 - 2021
Porsche 95B.3 Macan 2.0L 2022>>
* option code: T2G - 4-cylinder SI engine 2.0 l unit 06L.D
Porsche 9YA Cayenne 2.0L 01/2017 - 05/2023
* engine code: DFKA / DFK
Diagram ref no 16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A7103171
95810317110
95810317100
798.660
45216
The product you are viewing cross references to these numbers
Price: £48.50
Orderable
Information
Bearing clearance gauge pack
100 Plasigauge strips per box
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PLA007
The product you are viewing cross references to these numbers
100 Plasigauge strips per box
PLASTIGAUGE PL-A is widely used in the measurement of clearance in plain automotive bearings. Measurement of clearance in big-end bearings can be achieved without dismantling the crankshaft.
For measurements of: 0.001″ to 0.007″ (0.025mm – 0.175mm)
Suitable for use at temperatures between 0°C and 35°C
Contents:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PLA007
PL-A
The product you are viewing cross references to these numbers
Price: £50.89
In stock
