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Porsche > 911 & 912 (1965-1989) > 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F) > Engine Rebuild Parts > Oil System Parts >

Oil Level Senders

Oil Level Senders

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Oil level sender cork gasket. Porsche 911 1978-89 - 91420189100 - 911497/02, 00 911497-02
2
Oil level sender cork gasket. Porsche 911 1978-89
91420189100/1
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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.



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91420189100
91420189100

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Oil Level Sender in Tank. Porsche 911 1965-73 - 90164154100
3
Oil Level Sender in Tank. Porsche 911 1965-73
Special Order item
90164154100
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Oil Level Sender in Tank

porsche

Fits:
Porsche 911 1965-73

Click 'Zoom in' for large parts diagram.
Diagram Ref No 35.

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90164154100
90164154100

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Oil level sender in tank. Porsche 911 S 1973 - 91164154100
1
Oil level sender in tank. Porsche 911 S 1973
Special Order item
91164154100
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Product Information
Oil level sender. Fits inside oil tank.

porsche

Fits:
Porsche 911 S 1973 2.7L
TYP:
- 911/53
- 911/63
- 911/83
- 911/88

Fits into oil tank numbers:
- 91110700611

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

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91164154100
91164154100

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Oil level sender in tank. Porsche 911 S 1973 - 91164154100
2
Oil level sender in tank. Porsche 911 S 1973
91164154100/1
Product Information
Product Information
Oil Level Sender. Fits inside oil tank.

Fits:
Porsche 911 S 1973 2.7L
TYP:
- 911/53
- 911/63
- 911/83
- 911/88

Fits into oil tank numbers:
- 91110700611

Diagram ref no 2

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91164154100
91164154100

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Oil Level Sender. (First early version) Porsche 911 01/1963-07/1973 - 90174154100
3
Oil Level Sender. (First early version) Porsche 911 01/1963-07/1973
90174154100/1
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Oil Level Sender. Fits inside oil tank.
First early version

Fits:
Porsche 911 01/1963-07/1973

Diagram Ref No 2.

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90174154100
90174154100

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Oil level sender. Porsche 911 01/1963-07/1973 - 90164154100 - 1612950100
3
Oil level sender. Porsche 911 01/1963-07/1973
90164154100/1
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Oil Level Sender 

Maintain accurate monitoring of your classic Porsche's dry sump lubrication system with this Oil Level Sender. This high-quality replacement sender is manufactured to OE specifications, ensuring precise fitment, dependable operation and accurate oil level readings.

Fits:

  • Porsche 911 1965-1968 2.0L / 912 SWB (F)
  • Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

Diagram Ref No 2

The oil level sender is mounted within the external oil tank and continuously measures the engine oil level, transmitting this information to the dashboard oil level gauge. Accurate oil level indication is particularly important on air-cooled Porsche engines, where maintaining the correct oil quantity is essential for effective lubrication, cooling and long-term engine reliability.

Over time, original senders can become worn, contaminated or suffer electrical failure, resulting in inaccurate gauge readings or complete loss of oil level indication. Replacing the sender restores confidence in your dashboard instrumentation and helps ensure your engine always operates with the correct oil level.

What Does the Oil Level Sender Do?

The oil level sender monitors the quantity of oil stored within the external oil tank and sends an electrical signal to the dashboard oil level gauge.

Its functions include:

  • Monitoring engine oil level.
  • Providing accurate readings on the dashboard gauge.
  • Helping prevent overfilling or underfilling.
  • Supporting routine maintenance checks.
  • Protecting the engine from low oil levels.
  • Assisting with safe and reliable engine operation.

A correctly functioning oil level sender allows you to monitor one of the most important systems on your air-cooled Porsche.

Why Replace the Oil Level Sender?

After years of service, oil contamination, vibration and electrical wear can affect the sender's accuracy and reliability.

Replacement is recommended if you experience:

  • Incorrect oil level gauge readings.
  • Gauge fluctuating unexpectedly.
  • Oil level gauge permanently reading full or empty.
  • Intermittent oil level indication.
  • Internal corrosion.
  • Worn float mechanism.
  • Oil leaks around the sender seal.
  • Electrical connection faults.

Replacing a faulty sender restores accurate oil level monitoring and helps avoid unnecessary concern caused by incorrect gauge readings.

Symptoms of a Faulty Oil Level Sender

Common symptoms include:

  • Oil level gauge not responding.
  • Inaccurate oil level readings.
  • Fluctuating gauge movement.
  • Gauge stuck at one position.
  • Oil seepage around the sender.
  • Corroded electrical terminals.
  • Difficulty monitoring engine oil level accurately.

If these symptoms are present, the sender and its wiring should be inspected and replaced where necessary.

Benefits

Installing this OE Match Oil Level Sender provides:

  • Restores accurate oil level readings.
  • Improves confidence in dashboard instrumentation.
  • Helps maintain correct engine oil level.
  • Supports long-term engine protection.
  • Factory-quality fit and finish.
  • Reliable electrical performance.
  • Straightforward installation.
  • Perfect for restoration and routine servicing.

Installation Recommendations

Professional installation is recommended when servicing the oil tank or lubrication system.

While replacing the oil level sender, it is advisable to inspect or replace:

  • Oil level sender gasket or seal.
  • Oil tank mounting hardware.
  • Electrical terminals.
  • Wiring connections.
  • Dashboard oil level gauge.
  • Oil tank breather hoses.
  • Oil tank for internal contamination.
  • Engine oil and oil filter if due for service.

After installation, verify the oil level with the engine at operating temperature and idling on level ground, following Porsche's recommended oil level checking procedure.



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90164154100

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DISPLAYING 1 to 6 (of 6 products)
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About Oil Level Senders

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.

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