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- Accessories
- Brakes
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- Engine Electrical
- Engine Rebuild Parts
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Oil Pressure Senders / Switches
Fits:
Porsche 356 Pre A (1948 - 1955)
Porsche 356 A (1955 - 1959)
Porsche 356 B (1959 - 1963)
Porsche 356 C (1963 - 1965)
Porsche 911 F (1965 - 1969)
Porsche 914/6 (1970 - 1972)
Diagram ref no 72
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99965900940
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
- Porsche 914 (1970-1976)
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12 Month Warranty
Worldwide Delivery
Protect the electrical connection of your Porsche oil pressure switch with this OE Match Cap for Oil Pressure Switch, manufactured as a direct replacement. Produced to OE-style specifications, this protective cap is designed to fit securely over the oil pressure switch terminal, shielding the electrical connection from moisture, dirt, oil contamination, and engine bay debris. By protecting the terminal from the elements, it helps ensure reliable signal transmission between the oil pressure switch and the vehicle's electrical system.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
- Porsche 914 (1970-1976)
Diagram Ref No 72
With age and prolonged exposure to engine heat, oil vapours, and routine servicing, the original cap can become brittle, cracked, distorted, or may be lost altogether. An exposed electrical terminal is more susceptible to corrosion and contamination, which can result in poor electrical contact or intermittent oil pressure warning light operation. Replacing the protective cap restores the integrity of the connection, making this OE Match component ideal for Porsche maintenance, repairs, and restoration projects.
What This Product Does:
- Protects the oil pressure switch electrical terminal.
- Helps prevent moisture, dirt, and oil contamination from reaching the connector.
- Reduces the risk of corrosion at the electrical contact.
- Supports reliable oil pressure signal transmission.
- Replaces damaged, hardened, or missing protective caps.
- Helps maintain the integrity of the engine's electrical system.
- Provides an OE-style fit for straightforward installation.
Symptoms Of Wear Or Failure:
- Missing oil pressure switch protective cap.
- Cracked, split, or hardened cap material.
- Corrosion on the oil pressure switch terminal.
- Loose-fitting or damaged cap.
- Dirt or moisture around the electrical connection.
- Intermittent oil pressure warning light caused by poor electrical contact.
- Damage identified during engine servicing or restoration.
Why Replacement Matters:
- The oil pressure switch cap is a small but essential protective component that helps preserve the electrical connection between the oil pressure switch and the vehicle's wiring harness. Without adequate protection, moisture, dirt, and oil contamination can compromise the terminal, resulting in corrosion, unreliable electrical signals, and inaccurate oil pressure warning indications.
- Replacing a worn or missing cap restores protection to the electrical connection, helping to maintain dependable oil pressure monitoring and preventing unnecessary electrical faults. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Cap for Oil Pressure Switch provides reliable fit, performance, and durability for Porsche maintenance, repairs, and restoration projects.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99965900940
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
yellow galvanised.
Fits:
Porsche 356 1950-1965
Porsche 911 1965-1968
Porsche 912 1965-1969
Click ' Zoom in' for large parts diagram.
Diagram ref no 55
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161357100
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 356 1950-1965
Porsche 911 1965-1968
Porsche 912 1965-1969
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161357101
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 356 1950-65
Porsche 911 1965-1968
Porsche 912 1965-69
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161357101
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Shop Securely
12 Month Warranty
Worldwide Delivery
Hella ref no: 6ZL 003 259-391
Fits:
Porsche 356 1950-65
Porsche 911 1965-1968
Porsche 912 1965-69
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161357101
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Shop Securely
12 Month Warranty
Worldwide Delivery
Engine Oil Pressure Switches & Senders – Precision Monitoring for Porsche Engines
The engine oil pressure switch or sender unit is a vital component of your Porsche’s lubrication system. Its primary role is to monitor oil pressure and send signals to your dashboard, ensuring the engine always maintains sufficient lubrication. A properly functioning oil pressure sender safeguards against engine wear, overheating, and performance loss.
At Design911, we supply a full range of oil pressure switches and sender units for classic and modern Porsche models. Built from high-quality, heat-resistant materials, these components are designed for durability, accuracy, and consistent performance under demanding driving conditions.
Whether you’re restoring a classic 911, maintaining a Cayenne, or servicing a Cayman, our oil pressure senders and switches provide dependable pressure monitoring and peace of mind every time you drive.
What Do Oil Pressure Switches & Senders Do?
Oil pressure switches and senders work together to ensure your engine has the correct oil pressure for proper lubrication.
Core Functions:
- Monitor
oil pressure in the engine’s lubrication system.
- Transmit
readings or alerts to the vehicle’s dashboard gauge or warning light.
- Protect
engine components by warning of low oil pressure.
- Ensure stable oil circulation during all driving conditions.
Accurate oil pressure monitoring prevents engine damage and maintains optimal performance, making these parts essential to Porsche reliability.
Why Do Oil Pressure Switches & Senders Fail?
Over time, exposure to heat, vibration, and oil contamination can cause pressure switches and sensors to deteriorate or malfunction.
Common Causes of Failure Include:
- Oil
contamination clogging internal diaphragms or ports.
- Electrical
corrosion or connector failure.
- Seal
degradation, leading to oil leaks.
- Wear
and tear from repeated heat cycles.
- Faulty readings due to sensor fatigue or wiring damage.
Symptoms of a failing sender include flickering oil pressure lights, inaccurate gauge readings, oil leaks, or false low-pressure warnings, all of which can compromise performance or lead to unnecessary engine risk.
Why Replace Components?
A reliable oil pressure reading is crucial for the health of your Porsche engine. Replacing worn switches or senders with precision-engineered, high-quality components ensures dependable performance, accurate readings, and long-term protection.
Key Benefits:
- Restores accurate oil pressure readings.
- Prevents false dashboard warnings.
- Protects against engine wear and overheating.
- Constructed from heat- and corrosion-resistant materials.
- Direct-fit
design for easy installation and compatibility.
- Ideal for performance maintenance, rebuilds, or upgrades.
By replacing a faulty sender or switch, you’ll preserve accurate oil pressure data and maintain the performance and longevity of your Porsche engine.
Highlights:
Precision-engineered
Porsche oil pressure senders and switches.
Reliable
oil monitoring for consistent engine protection.
Heat-
and corrosion-resistant materials for long life.
Direct-fit
compatibility for Porsche 911, Cayman, Boxster & Panamera.
Prevents
false warnings and ensures accurate oil pressure readings.
Perfect
for preventive maintenance or complete engine rebuilds.
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Saturday: Closed
Sunday: Closed