Original Porsche Part Genuine Porsche part 99310601700

Alternator fan belt sensor.

Fits:
Porsche 964 C2 / C4 1992-94
Porsche 993 C2 / C4 1994-97
Porsche 993 Turbo 1994-97

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Diagram ref no 1

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99310603500

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Alternator Fan Wheel Hub.

Fits:
Porsche 964 Carrera RS 3.6L 1992
Porsche 993 Carrera RS 1995-96

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Diagram ref no 25

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99310605180

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RS Conversion Fan Hub 

Transform your Porsche engine bay with this OE Match RS Conversion Fan Hub, designed to convert the standard dual-belt cooling fan system fitted to the Porsche 964 and Porsche 993 into the single-belt arrangement used on the factory Carrera RS models.

Fits:

• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• 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) 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

Precision CNC machined from 6061 aircraft-grade aluminium and finished in a durable gloss black anodised coating, this premium-quality conversion hub combines motorsport-inspired appearance with exceptional strength and reliability. It provides a clean, simplified engine bay while reducing the number of drive belts, closely following the design philosophy used on the factory RS models.

Supplied complete with all the necessary fasteners, this OE Match conversion hub is ideal for RS-style engine builds, restorations and enthusiasts looking to enhance both the appearance and functionality of their air-cooled Porsche.

What Does the RS Conversion Fan Hub Do?

The RS Conversion Fan Hub replaces the original twin-belt fan drive arrangement with a single-belt configuration, replicating the system used on factory Porsche 964 RS and 993 RS models.

The conversion offers several advantages:

• Converts the standard dual-belt system to a factory RS-style single-belt drive.
• Simplifies the cooling fan drive assembly.
• Reduces the number of rotating components.
• Creates a cleaner, more purposeful engine bay.
• Maintains precise cooling fan alignment.
• Provides dependable operation under both road and performance driving conditions.

The result is a cleaner engine appearance combined with a proven factory-inspired cooling system layout.

Why Upgrade to an RS Conversion Fan Hub?

Many Porsche owners choose the RS-style single-belt conversion during engine rebuilds or restorations to recreate the appearance and engineering of Porsche's iconic Carrera RS models.

Benefits include:

• Factory RS-inspired appearance.
• Simplified belt arrangement.
• Reduced maintenance compared to the standard twin-belt setup.
• Ideal upgrade during engine rebuilds.
• Perfect for RS tribute and lightweight builds.
• Premium CNC-machined construction.
• Improved engine bay aesthetics.
• High-quality corrosion-resistant finish.

Whether restoring a classic air-cooled Porsche or building an RS-inspired road or track car, this conversion provides the ideal finishing touch.

Premium Engineering

Designed to deliver exceptional strength, precision and long-term reliability.

Benefits

Installing this RS Conversion Fan Hub provides:

• Authentic factory RS appearance.
• Cleaner, simplified engine bay.
• Lightweight aircraft-grade aluminium construction.
• Long-lasting anodised finish.
• Reliable cooling fan drive.
• Excellent fit and dimensional accuracy.
• Straightforward installation.
• Ideal for restoration, fast road and track applications.

Installation Recommendations

Professional installation is recommended.

During installation it is advisable to inspect or replace:

• Cooling fan.
• Alternator.
• Fan housing.
• Fan strap.
• Drive belt.
• Pulley components.
• Bearings.
• Mounting hardware.
• Engine cooling shims.

Replacing associated components during installation helps maximise reliability and ensures the cooling system performs as intended.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99310605180

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Engine fan housing restraining strap

Fits:
Porsche 993 Carrera 1994-98 (not for Turbo)

Diagram ref no 6

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99310601701

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Engine fan housing restraining strap



Fits:
Porsche 993 Carrera 1994-98 (not for Turbo)

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99310601701

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Alternator fan belt sensor
The 99310603500 Alternator Fan Belt Sensor is a component designed for use in Porsche 964 and 993 models, specifically addressing the alternator and fan belt system. This sensor plays a critical role in monitoring and ensuring the proper functioning of the alternator belt, which is essential for the vehicle's electrical system and overall performance.

Fits:
Porsche 964 C2 / C4 1992 - 1994
Porsche 993 C2 / C4 1994 - 1997
Porsche 993 Turbo 1994 - 1997

Diagram ref no 1

Key Information:
Part Number: 99310603500
Application: Porsche 964 / 993

Function and Application:

Monitoring Belt Tension: The alternator fan belt sensor is designed to monitor the tension of the alternator belt.
Alert System: If the sensor detects abnormal tension or a potential issue with the fan belt, it triggers an alert or warning signal.
Preventing Belt Failure: By monitoring the belt tension, the sensor helps prevent issues such as slippage or breakage, ensuring the continuous operation of the alternator and the proper charging of the vehicle's electrical system.

Importance of the Alternator Fan Belt Sensor:
The alternator fan belt is crucial for the functioning of the alternator, which plays a key role in charging the vehicle's battery and powering electrical components. The sensor helps prevent potential belt-related issues that could lead to alternator failure, electrical system malfunctions, or battery discharge.

Quality and Reliability:
Crafted to meet Porsche's high standards for quality and reliability, the 99310603500 Alternator Fan Belt Sensor is engineered to withstand the demands of the automotive environment. Its precise monitoring ensures early detection of potential problems, contributing to the overall reliability and performance of Porsche 964 and 993 models.

Whether you are conducting routine maintenance or addressing specific concerns related to the alternator and fan belt system in your Porsche, the alternator fan belt sensor is a critical component for ensuring the optimal functioning of the electrical system. Trust in the quality and engineering excellence of Porsche to maintain the performance of these iconic models.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99310603500

The product you are viewing cross references to these numbers