Crankcase Parts

Knock sensor.



Fits:
Porsche 986 Boxster 1997-04
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 996 Turbo 1998-05
Porsche 996 GT3 2000-05
Porsche 955 Cayenne S / Turbo 2003-06
Porsche Carrera GT 2004-06

This product supersedes Porsche's old part numbers:
- 99660612100
- 99660612500

Click 'Zoom in' for large parts diagram.
Diagram ref no 33

Related reference numbers
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99660612501

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Knock sensor.



Fits:
Porsche 986 Boxster 1997-04
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 996 Turbo 1998-05
Porsche 996 GT3 2000-05
Porsche 955 Cayenne S / Turbo 2003-06
Porsche Carrera GT 2004-06

This product supersedes Porsche's old part numbers:
- 99660612100
- 99660612500

Click 'Zoom in' for large parts diagram.
Diagram ref no 33

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99660612501

The product you are viewing cross references to these numbers

Knock sensor.



Fits:
Porsche 986 Boxster 1997-04
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 996 Turbo 1998-05
Porsche 996 GT3 2000-05
Porsche 955 Cayenne S / Turbo 2003-06
Porsche Carrera GT 2004-06

This product supersedes Porsche's old part numbers:
- 99660612100
- 99660612500

Click 'Zoom in' for large parts diagram.
Diagram ref no 33

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99660612501

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Oil drain plug. Porsche 911 / 964 / 993 M20 X1.5 MAGNETIC


Fits:
Porsche 911 3.2 Carrera - 1984 to 1989 Oil Drain Plug for side of crankcase
Porsche 911 - 1978 to 1984 Oil Drain plug for sump plate
Porsche 964 - 1989 to 1994
Porsche 993 - 1995 to 1998
Porsche 996 turbo / GT3 - 
Porsche 924S - 1986 to 1988
Porsche 944 - 1982 to 1991
Porsche 968 - 1992 to 1995
Porsche 928 - 1978 to 1995

Diagram ref no 22

A magnetic sump oil drain plug is a type of oil drain plug that contains a small magnet designed to attract and capture metallic particles that may be present in your engine's oil. While this type of drain plug is not exclusive to Porsche and can be used in various vehicles, it can provide several benefits, including:

Improved Engine Longevity: The magnet in the drain plug helps to capture tiny metal particles, such as iron, steel, or aluminum, that may circulate in the engine oil. Removing these particles can reduce wear and tear on engine components, potentially extending the engine's lifespan.

Enhanced Engine Performance: By reducing the presence of contaminants in the oil, a magnetic drain plug can help maintain the oil's lubricating properties, which is crucial for smooth engine operation. Clean oil can also contribute to improved fuel efficiency.

Early Detection of Problems: As the magnetic drain plug collects metallic debris, it can serve as an early warning system. By inspecting the drain plug during oil changes, you can get an idea of the engine's condition and detect any unusual wear or damage before it becomes a major issue.

Reduced Maintenance Costs: Regularly inspecting and cleaning a magnetic drain plug can prevent larger issues from developing over time. Addressing potential problems early can save you money on more extensive repairs down the road.

Peace of Mind: Knowing that you are taking steps to protect your engine from premature wear and tear can give you peace of mind as a vehicle owner. It's a relatively inexpensive and simple modification that can provide added assurance.

Easy Installation: Magnetic drain plugs are typically straightforward to install. They often replace the existing drain plug and require no special tools or modifications.

While magnetic drain plugs can offer these benefits, it's essential to remember that they are not a substitute for regular oil changes and proper maintenance. Regular oil changes with the appropriate oil and filter are still crucial for the health and longevity of your engine. Additionally, magnetic drain plugs may not capture all types of contaminants, so they should be seen as a supplementary measure rather than a comprehensive solution.

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94410719711

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Main crankshaft bearing shell.
Sold individually - 12 required per engine. 

Exterior Measurement: Standard. 
Interior Measurement: +0.25mm Oversize. 

Fits: 
Porsche 911 SC 3.0L 1978-1983 
Porsche 911 3.2L 1984-1989 
Porsche 959 2.8L 1987-1988 
Porsche 964 1989-1994 (All models inc. RS/Turbo) 
Porsche 993 1994-1998 (All models inc. RS/Turbo/GT2) 
Porsche 996 3.6L Turbo / GT2 2000-2005 
Porsche 996 3.6L GT3 >>2001 (360BHP Variant Only) 

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Diagram ref no 23

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93010113292

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Crankcase Stud Nut.

 


Fits:
Porsche 964 1990-94 (13 per engine)
Porsche 993 1995-98 (11 per engine)
Porsche 996TT / GT3 2001-2005 (11 per engine)

Click 'Zoom in' for large parts diagram
Diagram ref no 29

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95910117200

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Oil drain plug. Porsche 911 / 964 / 993 M20 X1.5 Magnetic

Fits:
Porsche 911 3.2 Carrera - 1984 to 1989 Oil Drain Plug for side of crankcase
Porsche 911 - 1978 to 1984 Oil Drain plug for sump plate
Porsche 964 - 1989 to 1994
Porsche 993 - 1995 to 1998
Porsche 996 turbo / GT3 - 
Porsche 924S - 1986 to 1988
Porsche 944 - 1982 to 1991
Porsche 968 - 1992 to 1995
Porsche 928 - 1978 to 1995

Diagram ref no 22

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94410719711

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Oil drain plug.
Please note: Sealing O-ring must be ordered separately – Part Number 90012310630/2

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1  Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.1 Cayman 2005 - 2008
Porsche 987C.2 Cayman 2009 - 2012
Porsche 981 Boxster 2013 - 2016
Porsche 981 Cayman 2014 - 2016
Porsche 996 1998 - 2005
Porsche 997.1 2005 - 2008
Porsche 997.2 2009 - 2012
Porsche 991.1 2012 - 2016


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90021900930

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Oil drain plug, non magnetic, alu, M18 x 1.5 x 12.
Please note: Sealing O-ring must be ordered separately – part number 90012310630/2

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1  Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.1 Cayman 2005 - 2008
Porsche 987C.2 Cayman 2009 - 2012
Porsche 981 Boxster 2013 - 2016
Porsche 981 Cayman 2014 - 2016
Porsche 996 1998 - 2005
Porsche 997.1 2005 - 2008
Porsche 997.2 2009 - 2012
Porsche 991.1 2012 - 2016

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90021900930

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Oil pressure relief piston
This OE Match oil pressure relief piston is a replacement piston used in the engine crankcase oil pressure relief system. It is designed to match the original Porsche-style fitment and helps regulate oil pressure within the engine lubrication circuit.

Fits:
Porsche 911/930 1974 - 1989
Porsche 964 1989 - 1994
Porsche 993 1995 - 1998
Porsche 996 Turbo / GT2 2001 - 2005
Porsche 997 Turbo / GT2 2005 >>
Porsche 996 GT3 / 997 GT3

Diagram ref no 16

The oil pressure relief piston works with the relief spring and guide components inside the engine block/crankcase. Its job is to help control excess oil pressure by allowing oil to bypass when pressure reaches the required limit, protecting the lubrication system and helping maintain consistent oil flow to critical engine components.

Functions
•  Helps regulate engine oil pressure
•  Works with the oil pressure relief spring and guide sleeve
•  Helps protect the engine from excessive oil pressure

•  Supports correct oil flow through the lubrication system
•  Helps maintain reliable lubrication of bearings and internal engine parts
•  Provides an OE Match replacement for the original relief piston
•  Suitable for engine rebuilds, crankcase service, and oil pressure repairs

The oil pressure relief piston is exposed to constant oil flow, heat, pressure, and engine wear particles. Over time, the piston can become scored, worn, sticky, or damaged, which may affect oil pressure regulation. A worn or sticking piston can contribute to low, high, or unstable oil pressure, so replacement is recommended during engine overhaul or when oil pressure control issues are being investigated.

When to replace
•   Oil pressure is too high, too low, or unstable
•   The original piston is scored, worn, sticking, or damaged
•   The engine has suffered internal wear or contamination
•   The crankcase oil pressure relief system is being serviced
•   The oil pressure relief spring, guide sleeve, or plug is being replaced
•   The engine is being rebuilt or overhauled
•   There are concerns about correct lubrication system operation

Where it fits on the car
This piston fits inside the engine crankcase/oil pressure relief valve assembly. It sits in the crankcase and is used with the relief spring and guide sleeve to control oil pressure in the engine lubrication system.

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91110751200

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Rear Main Oil Seal. 90 x 110 x 12.
Fitting Position: Transmission End, Inner Diameter: 90 mm, Outer diameter: 110 mm, Width: 12 mm, Radial Shaft Seal Design



Fits:
Porsche 964 1989-94
Porsche 993 1994-98
Porsche 996 Turbo / GT2 / GT3 MKI

Porsche 944 - All models including 944S, 944 Turbo & 944S2 built 1982-1991

Porsche 924S - All models built 1986-1988

Porsche 928 - All models built 1986-1995

Porsche 968 - All models built 1992-1995

Click 'Zoom in' for large parts diagram.
Diagram Ref No. 21

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99911342641

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Rear Main Oil Seal. 90 x 110 x 12.
Fitting Position: Transmission End, Inner Diameter: 90 mm, Outer diameter: 110 mm, Width: 12 mm, Radial Shaft Seal Design.

Fits:
Porsche 964 1989-94
Porsche 993 1994-98
Porsche 996 Turbo / GT2 / GT3 MKI

Porsche 944 - All models including 944S, 944 Turbo & 944 S2 built 1982-1991
Porsche 924S - All models built 1986-1988
Porsche 928 - All models built 1986-1995
Porsche 968 - All models built 1992-1995

Diagram Ref No. 21

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99911342641

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USED Exhaust Head Bolt Repair Kit.
This is a used part which has been fitted and used briefly then taken off the vehicle due to not meeting expectations of the customer. This part is in good working order. Ideal for restoration specialists, collectors, or workshops looking for components at reduced cost.

Condition: 
This Exhaust Head Bolt Repair Kit is a briefly used part. It has some fitting imperfections but in good / reusable working order.
Please see the gallery of images before purchasing.

Fits:

• Porsche Boxster 986 2.5L 1997-99
• Porsche Boxster 986 2.7L 1999-02
• Porsche Boxster S 986 3.2L 1999-02
• Porsche Boxster 986 2.7L 2003-04
• Porsche Boxster S 986 3.2L 2003-04
• Porsche Boxster 987 2.7L 2005-08/08
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• Porsche 996 C2 3.4L 1997-08/01
• Porsche 996 C4 3.4L 1997-08/01
• Porsche 996 C2 3.6L 09/01-2005
• Porsche 996 C4 3.6L 09/01-2005
• Porsche 996 C4S 3.6L 09/01-2005
• Porsche 996 TURBO 2000-05
• Porsche 996 GT2 2001-05
• Porsche 996 GT3 MKI 1999-02
• Porsche 996 GT3 MKII 2003>>
• Porsche 996 GT3 RS 2003-04
• Porsche 997 MK1 Carrera 2 3.6L 2005-08
• Porsche 997 MK1 Carrera 2S 3.8L 2005-08
• Porsche 997 MK1 Carrera 4 3.6L 2005-08
• Porsche 997 MK1 Carrera 4S 3.8L 2005-08
• Porsche Cayman 2.7L 987C 2006-08
• Porsche Cayman S 3.4L 987C 2005-08