Oil Level Senders

Oil Level Sender Unit Cork Gasket

Prevent oil leaks and maintain the integrity of your Porsche dry sump lubrication system with this OE Match Oil Level Sender Unit Cork Gasket. Designed for Porsche 911 models from 1965 to 1989, this gasket provides the critical seal between the oil level sender unit and the external oil tank.

Fits:

• 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 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)

Diagram Ref No 4

The oil level sender unit is responsible for monitoring the oil level within the tank and transmitting this information to the dashboard oil level gauge. The cork gasket creates a leak-free seal around the sender flange, preventing oil seepage while maintaining accurate oil level monitoring.

Although small and inexpensive, this gasket plays an important role in keeping the oil system properly sealed. During maintenance, sender replacement or oil tank restoration work, fitting a new gasket is highly recommended to prevent leaks and ensure reliable operation.

What Does an Oil Level Sender Unit Cork Gasket Do?

The gasket sits between the oil level sender unit and the oil tank mounting surface.

Its primary functions include:

• Creating a leak-proof seal
• Preventing oil seepage around the sender unit
• Maintaining oil tank integrity
• Supporting accurate oil level monitoring
• Preventing contamination from entering the oil tank
• Protecting surrounding engine bay components from oil leaks

A properly sealed sender unit helps maintain a clean engine bay and accurate oil system operation.

Why Do Oil Level Sender Gaskets Fail?

Cork gaskets naturally compress over time and are constantly exposed to oil, heat and vibration.

Common causes of failure include:

• Age-related hardening
• Compression set
• Shrinkage over time
• Heat cycling
• Oil saturation
• Improper installation
• Damage during sender removal
• Long-term storage deterioration

As the gasket loses elasticity, oil can begin to seep around the sender mounting flange.

When Should the Gasket Be Replaced?

The gasket should always be replaced whenever the oil level sender unit is removed.

Common signs of failure include:

• Oil leaks around the oil tank sender unit
• Oil residue on the oil tank
• Oil staining in the engine bay
• Perished or brittle gasket material
• Sender unit removal during servicing
• Oil tank refurbishment projects
• Oil level sender replacement

Replacing the gasket during routine maintenance is inexpensive insurance against future oil leaks.

Why Replacement Matters

A leaking oil sender gasket may appear minor but can lead to persistent oil leaks and unnecessary mess within the engine bay.

Benefits of replacement include:

• Prevents oil leaks
• Maintains proper oil tank sealing
• Protects engine bay components
• Supports accurate oil level monitoring
• Improves reliability
• Reduces maintenance clean-up
• Ideal for restoration projects
• Restores factory sealing performance

For classic Porsche 911 models, maintaining the dry sump oil system is essential for both reliability and originality.

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

91420189100

The product you are viewing cross references to these numbers

Oil level sender. Fits inside oil tank.



Fits:
Porsche 911 1974-89

Click 'zoom in' for large parts diagram.
Diagram ref no 2.

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

91164154105

The product you are viewing cross references to these numbers

Oil level sender.
Fits inside oil tank.

Fits:
Porsche 911 1974 - 1989

Diagram Ref No 2.

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

91164154105

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Oil Level Sender 

Restore accurate oil level monitoring with this OE Match Oil Level Sender. Manufactured for precise fitment and dependable performance, this replacement oil level sender accurately measures the oil level within the external oil tank and transmits the information to the dashboard oil level gauge.
 
Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)  

Diagram Ref No 2

The dry sump lubrication system used on the classic air-cooled Porsche 911 relies on an external oil tank and a dedicated oil level sender to provide the driver with an accurate indication of the engine's oil level. Over time, internal electrical components, the float mechanism and electrical contacts can deteriorate through age, heat and continual exposure to engine oil. This can result in inaccurate oil level readings or complete failure of the dashboard oil level gauge.

Replacing a worn or faulty oil level sender restores confidence in your vehicle's instrumentation, allowing you to accurately monitor the engine's oil level and maintain the correct quantity of lubricant for reliable engine operation.

Whether you're restoring a classic Porsche, repairing a faulty oil level gauge or carrying out preventative maintenance on the lubrication system, this OE Match Oil Level Sender offers a high-quality replacement solution.

What Does the Oil Level Sender Do?

The oil level sender continuously monitors the oil level inside the external oil tank and sends an electrical signal to the dashboard oil level gauge.

Its primary functions include:

• Measuring the oil level within the oil tank.
• Providing accurate information to the dashboard oil level gauge.
• Helping monitor the engine's lubrication system.
• Supporting routine oil level checks.
• Assisting with correct engine oil maintenance.
• Maintaining reliable dashboard gauge operation.

Accurate oil level monitoring is particularly important on dry sump Porsche engines, where maintaining the correct oil quantity is essential for reliable lubrication.

Why Do Oil Level Senders Fail?

Over many years of operation, the sender unit is constantly exposed to hot engine oil, vibration and temperature fluctuations.

Common causes of failure include:

• Internal electrical wear.
• Corrosion of electrical contacts.
• Float mechanism deterioration.
• Oil contamination.
• Age-related component fatigue.
• Damaged wiring connections.
• Sticking float movement.
• Internal resistance failure.

Typical symptoms include:

• Oil level gauge reading permanently empty or full.
• Fluctuating or erratic oil level readings.
• Inaccurate oil level indication.
• Intermittent gauge operation.
• Oil gauge failing to respond after servicing.
• Difficulty monitoring engine oil level.

Replacing the sender restores accurate oil level information and dependable instrument operation.

Benefits

• Restores accurate oil level readings.
• Improves confidence in engine oil monitoring.
• Helps maintain correct engine oil levels.
• Reliable electrical performance.
• Straightforward direct replacement.
• Suitable for both restored and regularly driven vehicles.

For the most accurate oil level readings, Porsche recommends checking the oil level with the engine fully warmed to operating temperature, idling on level ground, as specified in the owner's handbook. Whenever replacing the sender, it is also advisable to inspect the wiring connector and oil tank sealing gasket.

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

91164154105

The product you are viewing cross references to these numbers