Oil Level Sender. Porsche 911 1974-89  ❭  91164154105

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
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91164154105

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