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Filler Neck Parts
By OE Match
- 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
Fits:
Porsche 996 Carrera 3.4ltr / 3.6ltr - 1997 to 2005
Diagram ref no 15, 18 and 22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710713100
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- 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 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
OE Match oil filler cap and O-ring for Porsche 986 Boxster and 996 models. This replacement cap helps seal the engine oil filler neck, preventing oil vapour leaks, contamination, and loss of correct crankcase sealing.
Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 996 C2 / C4 / C4S 1998 - 2004
Porsche 996 Turbo / GT2
Porsche 996 GT3 2000 - 2005
Diagram ref no 18
The oil filler cap closes and seals the oil filler neck after engine oil has been added. The O-ring helps prevent oil vapour escape, oil seepage, dirt entry, and poor sealing within the engine lubrication and crankcase ventilation system.
Functions
• Replaces the engine oil filler cap, includes sealing O-ring
• Seals the oil filler neck
• Helps prevent oil vapour and oil seepage
• Helps stop dirt and debris entering the engine oil system
• Supports correct crankcase ventilation sealing
• OE Match replacement for Porsche 986 Boxster and 996 oil service.
Why Replace This Part?
Oil filler caps and O-rings can wear, harden, crack, loosen, or lose sealing ability due to age, heat, oil exposure, and repeated removal during servicing. A faulty cap or seal can cause oil vapour smells, minor oil seepage, poor crankcase sealing, or contamination risk. Replacing the cap and O-ring helps restore proper oil filler sealing and a clean engine bay.
When to Replace This Part
• The oil filler cap is cracked, loose, missing, or damaged
• The O-ring is hard, flattened, split, or missing
• Oil vapour smell is present around the filler area
• Oil seepage is visible near the filler neck
• The cap no longer tightens or seals correctly
• Engine oil service is being carried out
• The vehicle is undergoing Porsche 986 Boxster or 996 engine bay restoration.
Where it fits on the car
This cap and O-ring fit at the engine oil filler neck on Porsche 986 Boxster and 996 models. It forms part of the engine lubrication sealing system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610703550
The product you are viewing cross references to these numbers
- 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 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
Fits:
Porsche 996 Carrera 3.4ltr / 3.6ltr - 1997 to 2005
Porsche 997.1 Carrera 3.6ltr / 3.8ltr - 2004 to 2008
Diagram ref no 15
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710713100
The product you are viewing cross references to these numbers
OEMatch filler neck parts for Porsche models provide the connection between the engine or oil reservoir and the filler cap, enabling controlled oil refilling while maintaining the lubrication system seal. This collection covers filler necks, caps, seals and connecting pipes suitable for air-cooled and water-cooled Porsche engines, useful for routine maintenance, engine rebuilds and restoration work.
Understanding OEMatch Filler Neck PartsOEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original filler neck parts.
OE (Original Equipment) refers to parts matching original specifications for the filler neck parts and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM filler neck parts engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
These components form the filler neck assembly and are typically made from heat- and oil-resistant materials, with seals and O-rings that maintain pressure integrity and prevent contamination.
- Restores airtight sealing to prevent oil leaks and vapour loss.
- Supports clean, controlled oil refilling and reduces contamination risk.
- Replaces degraded pipes, seals and caps to maintain system pressure and reliability.
- Heat and vibration cause pipes and hoses to become brittle and crack.
- Seals and O-rings deteriorate from oil exposure and age, allowing vapour leaks.
- Residue and sludge build-up can impede sealing and lead to poor fitment.
Replacing worn filler neck components preserves oil system integrity, prevents leaks that can cause contamination or oil loss, and keeps servicing straightforward. Correct seals and properly formed filler pipes help the crankcase breathe as intended and support consistent engine operation across model years.
Advantages- Parts selected for compatibility with Porsche mounting points and service procedures.
- Materials chosen to resist oil, heat and corrosion for longer service life.
- Suitable for restoration and routine maintenance, covering both classic and modern applications.
