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Crankcase sealing plug A16. Porsche Cayenne 955 / 957 / 958 ❭ N0119034
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
Crankcase Sealing Plug (Core Plug) A16
Sold each
Restore the integrity of your Porsche engine with this OE
Match Crankcase Sealing Plug (Core Plug) A16. This precision-engineered sealing plug provides a secure seal within the
crankcase, helping to prevent oil leaks and maintain the integrity of the
engine block.
Fits:
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
Diagram ref no 3
Core plugs play a vital role in sealing machined openings within the engine during manufacture. Over time, corrosion, engine heat and age can cause these plugs to deteriorate, making replacement essential during engine repairs or rebuilds. This OE Match component offers the correct dimensions and fit for dependable sealing and long-term reliability.
Whether you're rebuilding an engine, repairing an oil leak or carrying out preventative maintenance, this OE Match crankcase sealing plug provides a reliable OE-quality solution.
What Does the Crankcase Sealing Plug Do?
The crankcase sealing plug closes a machined opening within the engine block or crankcase.
Its primary functions include:
- Sealing casting and machining openings within the engine.
- Preventing engine oil leaks.
- Maintaining crankcase integrity.
- Helping protect the engine against dirt and moisture ingress.
- Supporting long-term engine reliability.
- Providing a secure, leak-free seal under normal operating conditions.
Although simple in design, the sealing plug is essential for maintaining a properly sealed engine.
Why Does the Crankcase Sealing Plug Fail?
Over time, sealing plugs are exposed to harsh operating conditions.
Common causes of failure include:
- Corrosion caused by moisture and coolant contamination.
- Age-related deterioration.
- Heat cycling causing material fatigue.
- Mechanical damage during engine repairs.
- Incorrect installation.
- Wear associated with high-mileage engines.
A failing core plug can lead to oil leaks, contamination and unnecessary engine repairs if left unattended.
When Should It Be Replaced?
Replacement is recommended when:
- An oil leak is traced to the sealing plug.
- The original plug shows corrosion or damage.
- Carrying out a complete engine rebuild.
- The crankcase has been dismantled.
- Performing preventative maintenance on a high-mileage engine.
- Replacing other crankcase sealing components.
Replacing ageing core plugs during engine work helps avoid future leaks and reduces the likelihood of repeat labour costs.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
N0119034
The product you are viewing cross references to these numbers
- 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 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
Fits:
Porsche 986 Boxster 1997-04
Porsche 996 Carrera 1998-05
Porsche 987.1 Boxster 2005-08
Porsche 987.1 Cayman 2006-08
Porsche 987.1 Carrera 2006-08
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90021900930
The product you are viewing cross references to these numbers
- 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 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
Please note: A new sealing crush washer is recommended and must be ordered separately (Part Number: 90012310630/2).
Fits:
Porsche 986 Boxster 1997-04
Porsche 996 Carrera 1998-05
Porsche 987.1 Boxster 2005-08
Porsche 987.1 Cayman 2006-08
Porsche 997.1 Carrera 2005-08
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90021900930
The product you are viewing cross references to these numbers
- 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 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
Engine Oil Pan Failure Symptoms
- Cracking
- Oil Leaks

Fits:
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2005-08
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 997.1 C2 / C2S / C4 / C4S 2005-08
This product supersedes Porsche's old part numbers:
99610703155, 99610703157, 99610703158,
Click 'Zoom in' for large parts diagram
Diagram ref no 22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610703160
The product you are viewing cross references to these numbers
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