Standard Alternator / Genarator
Fits:
Porsche 924S 2.5L 1986-87
Porsche 924S 2.5L 1988
Porsche 944 2.5L 8V 1982-85
Porsche 968 CS 3.0L 1993-95 (without air conditioning)
Porsche 90A Alternator
The 90 Amp Alternator is a direct replacement unit designed to keep your Porsche’s charging system reliable and efficient. Engineered to OEM specifications, this alternator ensures a steady power supply for both classic and modern electrical demands — from ignition and lighting systems to in-car multimedia and performance accessories.
Key
Features
- 90 Amp Output – provides stable and consistent charging for your Porsche’s electrical systems.
- OEM Replacement – built to match factory standards for performance and durability.
- Direct Fitment – compatible with Porsche models requiring part numbers 94460310900.
- Durable Design – engineered to withstand high temperatures, vibration, and long-term use.
- Restores Reliability – ensures your battery stays charged, even with modern accessories installed.
Why Replace Your Alternator?
Over time, alternators can wear out due to age,
heat, and continuous use. Signs you may need a replacement include:
- Battery Warning Light on the dashboard
- Dim or Flickering Lights at idle or under load
- Difficulty Starting or frequent flat batteries
- Unusual Noises from bearings or internal components
- Electrical Failures when running multiple systems
If left unresolved, alternator failure can lead to battery drain, poor engine performance, and even breakdowns.
Benefits of
the 90A Alternator
- Restores factory-level performance
- Provides sufficient output for both OEM and aftermarket electrical systems
- Prevents battery drain and electrical faults
- Designed for long-term reliability
Replace your faulty or worn alternator with the Porsche 90A alternator – a direct-fit solution to keep your Porsche’s electrical system operating at peak performance.
Diagram ref no 6Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94460310900
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 968 CS 3.0L 1993-95

Reconditioned Alternator 90AMP
Fits:
Porsche 924S 1986-88
Porsche 968 CS 1993-95
For vehicles with 12V main current,
Alternator charge current: 90 A,
Number of ribs: 5,
with multi-belt pulley, P
lug-type ID: B+, D+,
Plug Type: Ring Connector,
Number of mounting bores: 3
Diagram ref no 6
Please note:
Reconditioned Alternators are sold on an exchange basis, A surcharge of £84.00 will be held and then refunded when the old one is returned.
- The surcharge for this reconditioned part will be refunded when the exchange unit is received and approved by us and the relevant manufacturer.
- Please note, surcharge refunds often take an average of 6 to 8 weeks to be approved by the manufacturer.
- Acceptance of the exchange part is at the manufacturer's discretion, based on the part being fit for reconditioning.
- All surcharges and exchanges are subject to our terms and conditions.
PLEASE NOTE:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94460310900
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 968 CS 3.0L 1993-95
Standard Output Alternators – Reliable Power Generation for Porsche Vehicles
Standard output alternators are a vital component in your Porsche’s electrical and charging system. They generate the electricity required to power essential systems such as lighting, ignition, infotainment, and battery charging. A dependable alternator ensures your vehicle maintains optimal voltage output, supporting both performance and everyday drivability.
At Design911, we offer a complete range of genuine and manufacturer-quality standard output alternators for Porsche models including 911, Boxster, Cayman, Cayenne, Macan, Panamera and transaxle models. Each alternator is precision-engineered for efficient charging, quiet operation, and long-term durability, delivering the performance your Porsche deserves.
What Do Standard Output Alternators Do?
Alternators play a crucial role in your Porsche’s electrical
system. Their main functions include:
- Generating
electrical power to run engine and vehicle electronics.
- Charging
the battery while the engine is running.
- Regulating
voltage output for consistent electrical performance.
- Powering accessories such as headlights, fans, and infotainment systems.
Standard output alternators provide reliable current for road use, ensuring steady voltage supply without overloading your vehicle’s electrical components.
Why Do Alternators Fail?
Alternators operate under high mechanical and electrical
loads, so over time they can wear or fail due to age, heat, and vibration.
Common causes include:
- Worn
bearings or brushes reducing output efficiency.
- Faulty
voltage regulators causing under- or overcharging.
- Corrosion
or oxidation in internal electrical connections.
- Loose
or slipping drive belts affecting alternator speed.
- Exposure to moisture, oil, or debris damaging internal components.
Symptoms of alternator failure include dimming headlights, electrical malfunctions, dead batteries, or dashboard battery warning lights.
Why Replace a Faulty
Alternator?
A failing alternator can cause serious electrical problems,
leaving you with a drained battery or stranded vehicle. Replacing a weak or
damaged alternator restores proper charging function, ensuring smooth
performance and reliability.
Benefits of replacement include:
- Consistent battery charging and voltage stability.
- Improved performance of all vehicle electronics.
- Prevention of battery drain and starting issues.
- Quiet, efficient, manufacturer-quality alternator operation.
Each alternator in this range is made using high-grade materials and precision-balanced components, ensuring dependable performance, low noise, and strong output for both standard and high-demand driving conditions.
1. What are the signs of a failing alternator in a
Porsche?
Common signs of a bad alternator include dimming
headlights, battery warning lights on the dashboard, slow or
failed engine starts, and unusual whining noises from the engine
bay. You might also notice intermittent electrical issues or a drained
battery, which often indicates the alternator is no longer charging
efficiently.
2. How long should a Porsche alternator last?
A well-maintained alternator in most Porsche models
typically lasts between 60,000 and 100,000 miles, depending on driving
conditions and electrical demand. Regular maintenance of belts and battery
connections helps extend alternator lifespan. If your vehicle is frequently
driven in stop-start traffic or harsh environments, periodic inspections are
recommended.
3. Can I drive my Porsche with a failing alternator?
Driving with a failing alternator is not recommended.
Once the alternator stops generating power, your Porsche will rely solely on
the battery — which can drain quickly. This can lead to engine stalling,
loss of power steering, or total electrical failure. To prevent further
damage, it’s best to replace the alternator as soon as symptoms appear.
4. What causes alternator failure in Porsche vehicles?
Alternator failure can be caused by worn bearings or
brushes, corrosion in electrical connections, a damaged voltage
regulator, or contaminants like oil or moisture entering the
alternator housing. Over time, high temperatures and belt tension can
also reduce efficiency or cause internal damage. Regular servicing helps
identify these issues early.