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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 356B 1959-63
- Porsche 356C 1963-65
- Porsche 914 (1970-1976)
Fits:
Porsche 356 B T6/C 1.6 08/62-12/65
Porsche 911 2.0-3.0 01/63-07/77
Porsche 912 1.6 01/65-02/70
Porsche 914 1.7-2.0 01/69-02/76
Click 'Zoom in' for large parts diagram.
Diagram ref no 42
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90120127101
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 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 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
Engine Oil Filler Neck Tube
This engine oil filler neck tube is designed for the Porsche
986 Boxster and provides a direct replacement for worn or damaged oil fill
pipes. It connects the oil filler cap to the engine, allowing clean and
controlled filling of engine oil while maintaining a sealed system.
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
Diagram Ref No 19
In the Porsche 986, the oil filler tube runs through the bodywork from the rear luggage compartment to the engine. Due to its length and exposure to heat and vibration, it is a known wear component that can degrade over time.
What This Oil Filler Neck Tube Does
The oil filler neck tube forms the pathway for adding engine oil safely into the engine.
It helps:
• Provide a sealed route from filler cap to engine
• Prevent oil leaks and vapour escape
• Ensure clean and accurate oil filling
• Maintain proper crankcase ventilation
• Support overall engine oil system integrity
A properly functioning filler tube is essential for both maintenance and engine reliability.
Why Oil Filler Neck Tubes Fail
Over time, the original oil filler tube can deteriorate due to heat, age and engine movement.
Common causes include:
Cracking and splitting
Plastic and rubber sections can become brittle and crack.
Oil contamination
Constant exposure to oil vapours can degrade materials.
Heat exposure
Engine bay temperatures accelerate wear and hardening.
Movement and vibration
Engine movement can stress the tube and connections.
Symptoms of a Failing Oil Filler Tube
• Oil smell from the engine bay or cabin
• Visible oil leaks around the filler tube
• Difficulty adding oil
• Engine warning lights related to vacuum leaks
• Rough running due to air leaks in the system
A damaged filler tube can lead to both oil leaks and unmetered air entering the engine.
Why You May Need to Replace This Tube
Fix Oil Leaks
Replacing a cracked tube prevents oil seepage and contamination.
Restore Proper Sealing
Ensures the oil system remains sealed and functions correctly.
Improve Engine Performance
Eliminates vacuum leaks that can affect engine running.
Essential Maintenance for Ageing Vehicles
A common failure point on Porsche 986 models.
Direct Fit Replacement
Designed to match original Porsche specifications for easy installation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610725403
The product you are viewing cross references to these numbers