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Oil Level Senders
- 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)
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
- 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)

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
- 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)
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
The product you are viewing cross references to these numbers
- 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)

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
Engine Oil Level Sender Units – Accurate Monitoring for Porsche Engine Health
The engine oil level sender unit is an essential part of your Porsche’s lubrication system, responsible for monitoring oil levels and sending accurate readings to the instrument cluster. It ensures that your engine maintains the correct amount of oil for proper lubrication, helping prevent overheating, friction, and potential engine failure.
At Design911, we offer a comprehensive range of oil level sender units designed to deliver reliable, accurate readings under all driving conditions. Each component is built to manufacturer-quality standards using durable, heat-resistant materials for consistent performance, even in high-temperature environments.
Whether you’re maintaining a modern 992 or restoring a classic 911, our engine oil level sensors and sender units provide dependable functionality and long-term reliability — ensuring your Porsche’s engine remains properly protected.
What Do Oil Level Sender Units Do?
Oil level sender units (or oil level sensors) measure the volume of oil in your engine’s sump or reservoir and transmit that information to your dashboard.
Core Functions:
- Continuously
monitor oil level during engine operation.
- Send
data to the driver display for real-time oil status.
- Warn
the driver of low oil levels before damage occurs.
- Assist in maintaining correct lubrication and cooling balance.
By providing real-time feedback, these components help protect your Porsche from lubrication-related issues and costly engine damage.
Why Do Oil Level Sender Units Fail?
Over time, exposure to oil residue, heat, and vibration can cause oil level sender units to degrade or malfunction, leading to inaccurate readings.
Common Causes of Failure Include:
- Sensor
contamination from sludge, debris, or burnt oil.
- Electrical
failure or corroded connectors.
- Worn
seals or gaskets, causing oil leaks.
- Short
circuits or internal faults in the sensor module.
- Mechanical damage from incorrect installation or impact.
Symptoms of failure include false oil warnings, fluctuating readings, or oil light illumination, even when the oil level is correct. These signs indicate that the sender unit needs inspection or replacement.
Why Replace Oil Level Sender Units?
A faulty oil level sensor can lead to incorrect oil readings — and potentially engine damage if a low-oil warning is missed. Replacing it with a precision-engineered sender unit restores reliable oil level monitoring and ensures consistent engine protection.
Key Benefits:
- Restores accurate oil level readings.
- Prevents false warnings and dashboard errors.
- Improves lubrication system reliability.
- Constructed from high-durability, heat-resistant materials.
- Direct-fit
compatibility for a wide range of Porsche engines.
- Ideal for maintenance, rebuilds, or preventive servicing.
Replacing the oil level sender unit ensures optimal performance, protection, and peace of mind — vital for keeping your Porsche running as intended.
Highlights:
- Precision-engineered oil level sender units for
- Porsche models. Reliable and accurate oil level monitoring.
- Improves engine safety and performance.
- Resists heat, corrosion, and oil contamination.
- Direct-fit installation with plug-and-play compatibility.
- Perfect for preventive maintenance or rebuilds.