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Standard Alternator / Genarator
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 1975-1977 3.0L Turbo (930)
Alternator Conversion Fitting Kit
Upgrade your early Porsche 911 turbo 3.0 (1975-77)
with confidence using this OE Match Alternator Conversion Fitting Kit.
Specifically designed to enable the installation of the later 12V 75A
Internal Regulator Alternator (91160312004), this complete fitting kit
contains all the essential OE-style components required to carry out the
conversion correctly.
Fits:
- Porsche 911 1975-1977 3.0L Turbo (930)
As Porsche developed the charging system during production, the later internally regulated alternator became the preferred replacement due to its simplified wiring, improved reliability and easier servicing. However, when fitting this later alternator to an early 3.0ltr 930 turbo, several additional installation components are required to ensure correct mounting and electrical integration.
This kit brings together those components in one convenient package, saving time, ensuring compatibility and eliminating the need to source each part individually.
Kit Contents
- Resistor 91164198100
× 1
- Air Deflector 91110603305
× 1
- Cable Connector 111971511 × 2
These components are required when fitting the later 91160312004 Internal Regulator Alternator to early Porsche 911 turbo 3.0-litre models fitted with the 91160312002 alternator manufactured between 1975 and 1977.
Why Is This Kit Required?
The early Porsche 930 Turbo used a different charging system configuration from the later internally regulated alternator.
When replacing to the later 91160312004 alternator, the additional installation components contained within this kit ensure:
Correct alternator installation. Proper mounting and fitment. Correct electrical connections. Reliable charging system operation. Factory-quality installation. Simplified conversion using the correct parts.Using the correct installation components helps avoid wiring issues, poor fitment and unnecessary modifications during installation.
Benefits of Upgrading to the Later Internal Regulator Alternator
Many Porsche owners choose to install the later internally
regulated alternator because it offers several advantages over the earlier
charging system:
- Simplified charging system design.
- Reduced external electrical components.
- Improved charging reliability.
- Easier servicing and maintenance.
- Better parts availability.
- Proven long-term durability.
- Direct compatibility when used with this fitting kit.
This conversion has become a popular solution during engine rebuilds, electrical restoration projects and preventative maintenance.
Benefits
- Saves time sourcing individual parts.
- Ensures correct installation of the later alternator.
- Helps maintain reliable charging performance.
- Supports factory-quality fitment.
- Reduces installation complications.
- Ideal during alternator replacement or engine restoration.
When replacing the alternator, it is also recommended to inspect the alternator drive belt, fan housing, charging cables, battery terminals, earth straps and electrical connectors to ensure the entire charging system operates efficiently.
Why Choose OE Match Electrical Components?
OE Match electrical components are manufactured to deliver dependable quality, accurate fitment and reliable performance for classic Porsche models. This conversion fitting kit has been assembled specifically for owners upgrading early 3.0ltr turbo models to the later internally regulated alternator, providing the correct components required to complete the installation professionally and efficiently. It is an ideal solution for restoration projects, preventative maintenance and charging system upgrades.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
911603FITTINGKIT
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 3.2L 1984-89
Porsche 930 3.3L 1978-89
Renewed cover with brand new electrics.
2 years warranty.
Overall length: 173mm
Voltage: 12V
Power: 90Amp.
Direction of rotation: Clockwise (CW)
Fixing: 6 studs
Controller: internal
Pulley: no
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
ALTERNATORKIT911.3.2
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Alternator with belt and shims for Porsche 911 3.0L 12v 75A applications, supplied as a standard output unit for classic 911 charging systems.
What This Product Does This alternator provides electrical power to run the vehicle’s systems and maintain the battery charge while the engine is running. It is intended as a direct-style replacement to support stable charging and correct fitment on suitable Porsche 911 3.0L models.
Functions
- Generates electrical power for engine and vehicle electronics
- Maintains battery charge during engine operation
- Regulates output to help provide consistent system voltage
- Supplies current for lighting, heating, and ancillary equipment
Symptoms of Fault
- Battery warning light illuminated or flickering
- Dimming or pulsing lights, especially at idle
- Repeatedly flat or weak battery
- Electrical functions behaving erratically
- Whining, grinding, or rumbling noise from the alternator area
- Belt squeal or visible belt slip under load
Why Replacement Matters A worn or failing alternator can lead to low charging voltage, causing starting issues, flat batteries, and unstable electrical behaviour. Replacing a weak unit with a correctly specified alternator helps restore reliable charging performance and supports proper operation of ignition, lighting, and other electrical systems on classic Porsche 911 models.
Fits
- Porsche 911 & 912 (1965–1989) → 911 1974–1977 2.7L / 1976–77 3.0 Carrera
- Porsche 911 & 912 (1965–1989) → 911 1978–1983 3.0L / SC
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
ALTERNATORKIT911.3.0
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 914 (1970-1976)
The air deflector serves as an air baffle and provides optimal cooling of the cylinders. Bolts to the back of the alternator.
Fits:
Porsche 911 - 1975 to 1977
Porsche 911 SC - 1978 to 1983
Diagram ref no 10
Mounted on the rear of the alternator or alternator hub, bolting into or adjacent to the fan housing / ventilation shroud.
What it does:
• Guides airflow from the cooling fan over the alternator and engine to maintain proper cooling
• Extends or positions the alternator hub correctly so pulleys are aligned and belt tension is correct
• Helps ensure consistent air circulation in the engine cooling system
Over time, deflectors or hub extensions can become warped, cracked, or corroded, compromising airflow and misaligning pulleys. A damaged deflector may lead to poor alternator cooling, reduced alternator lifespan, or belt misalignment. Replacing restores correct spacing, airflow direction, and ensures reliable alternator performance under all conditions.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110603305
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 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)
Fits:
Porsche 911 3.2 Carrera - 1984 to 1989
Porsche 911 turbo - 1984 to 1989
The air deflector serves as an air baffle and provides optimal cooling of the cylinders. Bolts to the back of the alternator.
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110605502
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Alternator 12V 75A – Internal Regulator
Keep your Porsche's charging system operating reliably with
this OE Match 12V 75A Alternator, equipped with an internal voltage
regulator. Manufactured to OE specifications, this replacement alternator
provides dependable charging performance, helping maintain battery health and
ensuring all electrical systems receive a stable power supply.
Fits:
Porsche 911 1978-1983 3.0L / SC
Porsche 911 1975-1977 3.0L Turbo (930)
Porsche 911 1978-1983 3.3L Turbo (930)
The alternator is one of the most important components of the vehicle's electrical system. While the engine is running, it generates electricity to power essential systems including the ignition, lighting, fuel injection, instruments, heating and ventilation controls, whilst simultaneously recharging the battery. A failing alternator can quickly lead to a discharged battery, poor engine performance and complete electrical failure.
This OE Match unit is manufactured for precise fitment and dependable long-term operation, making it an ideal replacement for worn or failed original alternators during routine maintenance or restoration.
What Does the Alternator Do?
The alternator converts mechanical energy from the engine into electrical energy.
Its primary functions include:
- Charging the vehicle battery.
- Supplying electrical power whilst the engine is running.
- Maintaining a stable charging voltage.
- Supporting ignition and fuel systems.
- Powering lighting and electrical accessories.
- Preventing battery discharge during normal driving.
The internal voltage regulator continuously controls the alternator output, ensuring the battery and electrical components receive the correct charging voltage without overcharging.
Why Replace the Alternator?
Alternators are subjected to constant heat, vibration and high rotational speeds throughout their service life.
Common causes of failure include:
- Worn bearings.
- Failed internal voltage regulator.
- Worn brushes.
- Damaged slip rings.
- Internal winding faults.
- Diode pack failure.
- Corrosion.
- Age-related wear.
Replacing a worn alternator restores reliable charging performance and helps prevent unexpected breakdowns.
Symptoms of a Failing Alternator
Common signs include:
- Battery warning light illuminated.
- Battery repeatedly going flat.
- Slow engine cranking.
- Dim or flickering headlights.
- Unstable voltage.
- Electrical accessories operating poorly.
- Intermittent charging.
- Bearing noise from the alternator.
- Burning electrical smell in severe cases.
Ignoring these symptoms can eventually leave the vehicle unable to start once the battery becomes fully discharged.
Important Installation Information
This alternator is suitable for Porsche 911 models (1978-1983) using an internal voltage regulator.
For Porsche 911 turbo 3.0ltr (1975-1977) applications,
the following additional components are required:
- Resistor 91164198100
× 1
- Air Deflector 91110603305
× 1
- Cable Connector 111971511 × 2
Voltage: 12V
Power: 75 Amp.
Direction of rotation: Clockwise (CW)
Attachment: 6 bolts, Radius 135 mm
Controller: internal
Pulley: no
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160312004
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)
Fits:
Porsche 911 1965-74
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160312000
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Fits:
Porsche 911 1969-73
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161203720
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 1978-1989 3.3L Turbo (930)
12 Volt 90 Amp Alternator
The Porsche Alternator is a high-quality 12 Volt
90 Amp charging system component designed for Porsche 911 and Porsche 911 turbo
models. As one of the most important electrical components on the vehicle, the
alternator generates electrical power while the engine is running and
continuously recharges the battery to maintain reliable operation of the
vehicle's electrical systems.
Fits:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
From powering the ignition system and fuel delivery
components to supporting lighting, instrumentation, heating and other
electrical accessories, the alternator plays a crucial role in the day-to-day
reliability and performance of your Porsche. Without a properly functioning
alternator, the battery will gradually discharge, leading to starting
difficulties, electrical faults and eventually complete vehicle shutdown.
Overall length: 173mm
Voltage: 12V
Power: 90Amp
Direction of rotation: clockwise (CW)
Fixing: 6 studs
Controller: internal
Pulley: not supplied
Whether you're maintaining an air-cooled Porsche 911, servicing a Porsche 911 turbo or carrying out a restoration project, replacing a worn alternator helps ensure dependable performance and protects the vehicle's electrical system.
What Does an Alternator Do?
The alternator converts mechanical energy generated by the engine into electrical energy. Driven by the engine belt system, it supplies power to the vehicle while simultaneously charging the battery.
The alternator is responsible for:
Recharging the battery while driving Powering electrical systems and accessories Maintaining stable system voltage Supporting ignition and fuel system operation Ensuring reliable starting performanceA healthy alternator is essential for keeping every electrical system operating correctly.
Symptoms of Alternator Wear or Failure
Alternators operate continuously whenever the engine is running and are subjected to heat, vibration and electrical load. Over time, internal components such as bearings, brushes, voltage regulators and diodes can wear or fail.
Common symptoms of alternator failure include:
Battery warning light illuminated Repeated flat batteries Slow or difficult engine starting Flickering headlights Dimming dashboard lights Electrical accessories operating intermittently Low charging voltage Unusual whining or grinding noises Burning electrical smell Vehicle stalling due to insufficient voltageIn many cases, alternator failure develops gradually before progressing to complete charging system failure.
Why Alternator Replacement Matters
A faulty alternator can leave the battery unable to recharge properly, eventually causing loss of electrical power and unexpected breakdowns.
Replacing a worn alternator helps:
Restore correct battery charging Improve electrical system reliability Prevent roadside breakdowns Maintain stable voltage output Extend battery life Protect sensitive electrical components Eliminate charging system warning lights Improve overall vehicle dependabilityFor classic and performance Porsche models, maintaining a healthy charging system is essential for reliable operation and long-term ownership enjoyment.
Features & Benefits
- 12 Volt, 90 Amp output
- Provides reliable battery charging
- Maintains stable electrical system voltage
- Supports ignition and fuel system operation
- Durable construction for long service life
- Ideal for maintenance, repairs and restoration projects
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160312005
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
Internal regulator replacement for external reg. alternator
Fits:
Porsche 911 1975-81 (Non Turbo)
2.7L / 3.0L Carrera
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160312002
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
All new connectors, housings, connector boots, and engine tin square grommet. Manufactured to original specs.
Fits:
Porsche 911 1970-71
Made in Canada
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91161201600
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Fits:
Porsche 911 1970-71
Made in Canada
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91161201700
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Fits:
Porsche 911 1974-75
Made in Canada
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91161201731
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
Fits:
Porsche 911 1982-83
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91161201604
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 912 1965-69
Diagram ref no 4
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
61610938100
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 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)
Fits:
Porsche 911 - 1965 to 1973 - (alternator)
Porsche 911 turbo - 1987 to 1989 (intercooler)
Porsche 914 - 1970 to 1976
Click 'Zoom in' for large parts diagram.
Diagram ref no 18 or 17
Related reference numbers
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90161211000
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-
air cooling 911 1978-83 105-00
-
air cooling 911 1970-73 105-00
-
generator starter 911 1978-83 902-05
-
wiring harnesses: engine 911 1978-83 902-11
-
air cooling 911 1987-89 105-00
-
charge air cooler 911 TURBO 930.66/68 1987-89 107-45
-
air cooling 911 1984-86 105-00
-
Engine electrics 911 1970-73 901-00
-
generator 770 W - MOTOROLA for 911 1970-73 / MARCHAL for 911 1972 onwards / S. E. V. for 911 1972 onwards 901-10
-
Wiring harnesses 911 1970-73 902-10
-
Air Cooling 911 1974-77 105-00
-
Generator 911 1974-77 902-10
-
Wiring harnesses 911 1974-77 902-20
-
engine electrics 911 1965-69 901-00
-
engine electrics 912 1965-69 901-05
-
wiring harnesses 911 1965-69 902-15
-
air cooling 911 TURBO 1975-77 105-00
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generator 911 TURBO 1975-77 902-10
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battery, starter, generator 911 1984-86 902-05
OEMatch Standard Alternator / Genarator — Fit, Function, Confidence
Standard output alternators convert mechanical energy into electrical power to run vehicle systems and maintain battery charge for Porsche models. Many owners search for genuine or OEM alternators; these are direct-fit alternatives designed to match the original form, fit and function.
Available Types
- Standard output alternators for road use
Understanding OEMatch Standard Alternator / Genarator
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original alternators. OE (Original Equipment) refers to parts matching original specifications for the alternators and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM alternators engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Alternators generate the electricity required to power ignition, lighting, infotainment and charging circuits. They must regulate voltage and deliver steady current under heat and vibration. Symptoms of reduced alternator performance include dimming lights, warning indicators, slow cranking or a failing battery; early detection helps prevent secondary electrical faults.
Benefits Include
- Restores consistent battery charging and voltage regulation
- Maintains correct operation of lights, ignition and accessories
- Prevents battery drain and related starting issues
Why Standard Alternator / Genarator Wear and Fail
- Worn bearings or brushes reducing mechanical and electrical efficiency
- Faulty voltage regulators causing under- or overcharging
- Corrosion or contamination of internal connections and cooling passages
The Importance of Replacing with OEMatch Standard Alternator / Genarator
A functioning alternator keeps your Porsche’s electrical system working and helps avoid a drained battery or roadside immobilisation. Replacing a weak or damaged alternator restores reliable charging and reduces the risk of further electrical damage to vehicle systems, supporting day-to-day drivability and longer-term component life.
Advantages
- Compatible replacements that restore charging function
- Designed to interface with Porsche electrical systems and mounting points
- Built from materials chosen for durability and balance
Support & Advice
These items affect safety-critical systems. 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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