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- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Fits:
For cars with Tiptronic transmission (I249) and Manual transmission (I480/481)
Porsche 987.1 Boxster 2007-08
Porsche 987C.1 Cayman 2007-08
Porsche 997.1 Carrera 2007-09
Porsche 997.1 Turbo 2007-09
Porsche 997 GT3 2010-11
Plug type
Diagram ref no 20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99760302205
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Alternator 14 Volt 90 Amp
The Porsche Alternator is a high-quality 14 Volt, 90 Amp charging system component designed for Porsche 928 models produced between 1978 and 1984. As a critical part of the vehicle's electrical system, the alternator generates electrical power while the engine is running and continuously recharges the battery to ensure reliable operation of all onboard systems.
The alternator supplies power to essential components
including the ignition system, fuel injection, engine management systems,
lighting, instrumentation, climate control and electrical accessories. Without
sufficient charging output, the battery will gradually discharge, leading to
electrical faults, poor starting performance and eventual vehicle breakdown.
Fastening Type: Single pivoted lever
Pulleys: without belt pulley
Info: with integrated regulator
Rotation Direction: Clockwise rotation
Connector / Clamp without connection for speed sensor
Voltage: 14v
Alternator Charge Current: 90 amp
manufacturer quality: MADE IN GERMANY
For owners of early Porsche 928 models, maintaining a healthy charging system is essential to preserve reliability, performance and the smooth operation expected from Porsche's luxury V8 grand tourer.
What Does an Alternator Do?
The alternator converts mechanical energy from the running engine into electrical energy. Driven by the engine belt system, it continuously generates power to operate the vehicle's electrical systems while simultaneously charging the battery.
The alternator is responsible for:
Charging the battery while driving Supplying power to vehicle electrical systems Maintaining correct system voltage Supporting ignition and fuel injection operation Ensuring reliable engine startingA properly functioning alternator is essential for maintaining stable electrical performance throughout the vehicle.
Symptoms of Alternator Wear or Failure
Alternators operate under constant electrical and mechanical load and are exposed to heat, vibration and age-related wear. Over time, internal components such as bearings, brushes, voltage regulators and rectifiers can deteriorate.
Common symptoms of alternator failure include:
Battery warning light illuminated Flat or repeatedly discharged battery Slow engine cranking Hard starting Flickering or dim headlights Weak dashboard illumination Electrical accessories operating intermittently Low charging voltage Whining, grinding or bearing noises Burning electrical smell Engine stalling caused by low system voltageIn many cases, charging performance gradually deteriorates before complete alternator failure occurs.
Why Alternator Replacement Matters
A failing alternator can leave the battery unable to recharge, eventually resulting in complete loss of electrical power and vehicle breakdown.
Replacing a worn alternator helps:
Restore proper battery charging Prevent unexpected breakdowns Improve electrical system reliability Maintain stable charging voltage Extend battery life Protect sensitive electrical components Eliminate charging system warning lights Ensure dependable vehicle operationFor classic Porsche 928 models, maintaining correct charging voltage is especially important for protecting ageing electrical systems and ensuring long-term reliability.
Features & Benefits
- 14 Volt, 90 Amp output
- Provides reliable battery charging
- Maintains stable electrical system voltage
- Supports ignition and fuel injection systems
- Helps prevent battery discharge
- Durable construction for long service life
- Ideal for maintenance, repairs and restoration projects
Keep your Porsche 928 charging system operating at peak performance with this Alternator
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92860311401
The product you are viewing cross references to these numbers