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Standard Alternator / Genarator
By OE Match
- 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Related, superseded, cross reference or alternative numbers for comparison.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 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Related, superseded, cross reference or alternative numbers for comparison.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 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 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
Related, superseded, cross reference or alternative numbers for comparison.
90161211000
The product you are viewing cross references to these numbers
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.
