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Oil Pressure Senders / Switches
By OE Match
- 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)
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Fits:
Porsche 911 1965-73
Click 'Zoom in' for large parts diagram.
Diagram ref no 59.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90174155102
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
Fits:
Porsche 911 1974-77
This product supersedes Porsche's old part numbers:
- 91160611100
Diagram Ref No 47.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160611102
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
Oil Pressure Sender Unit
The Oil Pressure Sender Unit is a critical engine monitoring
component fitted to the Porsche 911 SC from 1978 to 1983. Designed to
continuously monitor engine oil pressure and transmit accurate readings to the
dashboard gauge, this sender unit allows drivers to keep track of one of the
most important indicators of engine health.
Fits:
- Porsche 911 1978-1983 3.0L / SC
Diagram ref no 45
On air-cooled Porsche engines, maintaining correct oil pressure is essential for lubrication, cooling, and long-term engine protection. The oil pressure sender unit converts oil pressure into an electrical signal that is displayed on the instrument cluster, providing real-time feedback on the condition of the lubrication system.
A faulty sender unit can result in inaccurate readings, fluctuating gauge behaviour, or complete loss of oil pressure indication, making replacement an important part of preventative maintenance and engine reliability.
What Does the Oil Pressure Sender Unit Do?
The oil pressure sender measures the pressure generated within the engine's lubrication system and sends a corresponding electrical signal to the oil pressure gauge.
This enables the driver to:
- Monitor engine oil pressure in real time
- Identify lubrication issues before serious damage occurs
- Detect low oil pressure conditions
- Verify correct oil circulation throughout the engine
- Monitor engine health during normal driving and performance use
Because the Porsche 911 SC uses an air-cooled engine with a sophisticated dry-sump lubrication system, accurate oil pressure readings are particularly important for protecting valuable engine components.
Why Does the Oil Pressure Sender Unit Fail?
Oil pressure sender units operate in a harsh environment exposed to heat, vibration, oil contamination, and age-related deterioration.
Common causes of failure include:
- Internal electrical wear
- Diaphragm deterioration
- Oil contamination inside the sender
- Corrosion of electrical terminals
- Heat-related degradation
- Vibration damage Internal sealing failure causing oil leaks
- Age-related sensor inaccuracy
As the sender ages, readings may become erratic, inaccurate, or completely non-functional.
Common Symptoms of a Faulty Oil Pressure Sender
A failing oil pressure sender unit may cause:
- Oil pressure gauge fluctuating unexpectedly
- Incorrect oil pressure readings
- Gauge reading permanently high or low
- Intermittent gauge operation
- No oil pressure indication at all
- Oil leakage from the sender body
- Dashboard oil pressure concerns despite normal engine operation
In many cases, the sender unit itself is the source of the problem rather than the engine's oil pressure system.
When Should You Replace It?
Replacement is recommended when:
- Oil pressure readings become unreliable
- The gauge behaves erratically
- The sender develops an oil leak
- During engine restoration work
- When replacing ageing engine sensors
- As part of preventative maintenance on high-mileage vehicles
- During diagnosis of oil pressure-related dashboard faults
Replacing a faulty sender restores confidence in your oil pressure monitoring system and helps ensure that genuine lubrication issues can be identified quickly.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160611103
The product you are viewing cross references to these numbers
- 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 1984-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 43.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160613500
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
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 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
Sits on crankcase and on front radiator.
Fits:
Porsche 911 1984-89 (not Turbo)
Porsche 944 1985-88
Click 'zoom in' for large parts diagram (crankcase).
Diagram Ref No 37.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93060611800
The product you are viewing cross references to these numbers
- 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)
Fits:
Porsche 911 1969-89
Diagram ref no 45
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160623001
The product you are viewing cross references to these numbers
- 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)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
OE Match oil thermostat O-ring on engine case, 39.2 x 3mm, for Porsche 911, 914-6, 964, and 993 models. This replacement sealing O-ring helps prevent oil leaks at the engine-mounted thermostat area and supports correct engine oil system sealing.
Fits:
Porsche 911 - 1970 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1997
Porsche 914-6 - 1970 to 1976
Diagram ref no 34
The O-ring seals the joint between the oil thermostat and engine case. A correctly fitted seal helps prevent oil seepage, maintain oil system integrity, and keep the engine area clean and leak-free.
Functions
• Replaces the oil thermostat O-ring
• Seals the thermostat connection on the engine case
• Helps prevent engine oil leaks
• Supports correct oil system sealing
• Suitable for oil thermostat, engine case, or oil leak repair
• Replaces hardened, flattened, cracked, swollen, or damaged O-rings
• OE Match replacement for Porsche engine oil system service.
Why Replace This Part?
Oil thermostat O-rings can harden, flatten, crack, swell, or lose sealing ability due to heat, age, oil exposure, and pressure cycles. A worn or damaged O-ring may allow oil seepage around the thermostat area, causing oil residue, low oil level concerns, engine bay contamination, or failed inspection. Replacement is recommended whenever the thermostat is removed or oil leakage is present.
When to Replace This Part
• Oil is leaking around the engine-mounted thermostat area
• The oil thermostat has been removed or serviced
• The O-ring is hard, flattened, cracked, swollen, or damaged
• Engine case sealing work is being carried out
• Oil seepage or oil residue is visible around the thermostat connection
• Preventative replacement is required during engine service
Where it fits on the car
This O-ring fits at the oil thermostat connection on the engine case. It forms part of the engine oil sealing system on Porsche 911, 914, 964, and 993 models.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970731440
The product you are viewing cross references to these numbers
-
crankcase 911 1970-73 101-05
-
engine lubrication 911 T-E/E/S and 911 T-V 1972 104-15
-
engine lubrication auxiliary units for TYP 911/53/63 - 911 T-E/E/S and 911 T-V 1972 104-20
-
crankcase right 911 1978-83 101-10
-
crankcase left 911 1987-89 101-05
-
crankcase right 911 1987-89 101-10
-
engine lubrication oil cooler 911 1987-89 104-05
-
Crankcase left 911 1984-86 101-05
-
Crankcase right 911 1984-86 101-10
-
engine lubrication oil cooler 911 1984-86 104-05
-
Crankcase right 911 1974-77 101-10
-
Crankcase 911 1965-69 101-05
-
engine lubrication 912 1965-69 104-10
-
engine electrics 911 1965-69 901-00
-
engine electrics 912 1965-69 901-05
-
crankcase right 911 Turbo 1975-77 101-10
OEMatch Oil Pressure Senders / Switches — Durability, Sealing, Performance
Keep accurate engine oil pressure information for Porsche models with pressure senders and warning switches selected for reliable, consistent signalling. These units convert mechanical pressure into dashboard readings or warning alerts, helping to indicate lubrication issues early and supporting correct engine operation and maintenance decisions.
Available Types- Pressure sender for gauge circuits
- Pressure switch for dashboard warning lights
- Combined sender/switch units where fitted
- High-pressure and low-pressure variants for specific engines
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original oil pressure senders / switches.
OE (Original Equipment) refers to parts matching original specifications for the oil pressure senders / switches and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM oil pressure senders / switches engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Oil pressure senders and switches monitor the lubrication system and provide either continuous pressure readings or a threshold warning. A sender produces a variable signal for the gauge while a switch operates a warning lamp at low pressure. Faulty units can give flickering or incorrect readings, false warnings, or fail to alert when pressure drops. OEMatch maintains a wide catalogue of Porsche part numbers and numerous OE cross-references and continues to develop new product lines to support maintenance and restoration.
- Restores accurate oil pressure signalling to the instrument panel
- Reduces false low-pressure warnings that can cause unnecessary intervention
- Helps maintain correct engine lubrication awareness for routine checks and servicing
- Oil contamination or sludge blocking internal ports and diaphragms
- Electrical corrosion, degraded connectors or wiring faults
- Seal deterioration, thread damage or oil leaks at the mounting point
- Thermal cycling and vibration leading to sensor drift or mechanical fatigue
Accurate oil pressure information is essential for safe and reliable engine operation. A dependable sender or switch reduces the risk of unnoticed low oil pressure and the subsequent wear that can accelerate bearing and component damage. Replacing a degraded unit restores clear dashboard indication and supports correct maintenance decisions for Porsche engines.
Advantages- Direct-fit replacements engineered to match original dimensions and tolerances
- Constructed from heat- and corrosion-resistant materials for long service life
- Designed to mate with original electrical connectors and mounting points for straightforward installation
Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified.
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Filler Neck Parts
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Oil Tank & Parts
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Oil Level Senders
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Oil Pressure Relief Valve
-
Oil Pipes & Hoses
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Breather Pipes
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Camshaft Lines
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Oil Separators & Vent lines
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Oil Pumps & Gaskets
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Oil Coolers / Radiators / Heat Exchangers
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Oil Sump
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Oil Thermostat
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Oil Filter Housing
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Oil Temperature Sensor
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Oil Level Dipstick
