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Belts All Types
By OE Match
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 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
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
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
This OE Match alternator / fan belt is a replacement drive belt for Porsche 964 and 993 models. It is used in the air-cooled engine belt drive system to operate the engine cooling fan and alternator, helping maintain correct engine cooling and battery charging performance.
FAN Belt
Porsche 964 Carrera 1989>>1994 Cars With Manual Or Tiptronic Transmission
Porsche 993 Carrera 1994>>1997 Cars With Manual Or Tiptronic Transmission
Diagram Ref No 13
OR
ALTERNATOR Belt
Porsche 964 Carrera 1989>>1994 Cars With Manual Transmission
Porsche 993 Carrera 1994>>1997 Cars With Manual Transmission
Diagram Ref 14
The alternator / fan belt transfers drive from the engine pulley to the cooling fan and alternator assembly. On air-cooled Porsche engines, this belt is essential because it powers the fan that moves cooling air across the engine and also drives the alternator to charge the battery and support the vehicle electrical system.
Functions
• Drives the engine cooling fan
• Drives the alternator for battery charging
• Supports correct air-cooled engine temperature control
• Helps maintain stable electrical system voltage
• Prevents loss of cooling fan operation caused by belt wear or failure
• Replaces cracked, glazed, stretched, or worn original belts
• OE Match replacement for correct fit and reliable belt drive performance
Why Replace This Part?
The alternator / fan belt is exposed to heat, rotation, tension, and engine bay wear. Over time, the belt can crack, stretch, glaze, fray, or lose grip. A worn or failed belt can cause charging problems, battery warning lights, cooling fan failure, overheating risk, belt noise, or complete loss of alternator output. Replacing the belt helps maintain reliable cooling and charging system operation.
When to Replace This Part
• The belt is cracked, frayed, glazed, loose, or worn
• There is squealing or slipping from the belt area
• The battery/charging warning light is illuminated
• The alternator is not charging correctly
• The engine cooling fan is not being driven properly
• The belt has been removed during alternator, fan, or pulley service
• As part of routine maintenance on Porsche 964 or 993 air-cooled engines
• As preventative replacement before long journeys or major servicing
Where it fits on the car
This belt fits in the rear engine bay on the engine pulley, alternator, and cooling fan drive assembly. It forms part of the air-cooled engine accessory drive system and is fitted at the fan/alternator housing area.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919233851
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
This OE Match power steering belt is a replacement engine drive belt for Porsche 964 models from 1990 to 1994. It is designed to match the original-style fitment and function. This replacement drive belt helps power the power steering pump, supporting smooth steering assistance and reliable steering system operation.
Fits:
Porsche 964 1990 - 1994
Diagram Ref No 17
The power steering belt transfers rotational drive from the engine pulley system to the power steering pump. This allows the pump to generate hydraulic pressure for steering assistance, helping provide lighter and more controlled steering input during driving and manoeuvring.
Functions
• Replaces the power steering drive belt
• Drives the power steering pump
• Supports correct hydraulic steering assistance
• Helps maintain smooth and consistent steering feel
• Replaces cracked, glazed, stretched, frayed, noisy, or slipping belts
• Suitable for routine servicing and preventative maintenance
• OE Match replacement for Porsche 964 steering system service.
Why Replace This Part?
Power steering belts wear over time due to heat, vibration, pulley contact, age, and tension changes. A worn belt can crack, glaze, stretch, fray, squeal, slip, or fail completely. If the belt slips or breaks, the power steering pump may not operate correctly, which can result in heavy steering, warning symptoms, noise, or reduced steering assistance. Replacing the belt helps restore dependable power steering operation.
When to Replace This Part
• The power steering belt is cracked, glazed, frayed, loose, or worn
• Belt squeal or chirping is heard during steering or start-up
• Steering assistance feels heavy or inconsistent
• The power steering pump, pulleys, or tensioning components are being serviced
• The belt is slipping or not tracking correctly
• Preventative belt replacement is being carried out during scheduled maintenance
• The vehicle is undergoing Porsche 964 engine bay or steering system service.
Where it fits on the car
This belt fits within the power steering pump drive system on Porsche 964 models from 1990 to 1994. It runs around the relevant pulleys according to the factory belt routing.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96414718703
The product you are viewing cross references to these numbers
OEMatch Belts All Types — Fit, Function, Confidence
OEMatch belts cover a wide variety of drive and auxiliary applications on Porsche vehicles, including alternator, fan and power steering drives. These components play a key role in day-to-day running, so replacing aged or worn belts helps maintain smooth, predictable operation for Porsche models.
- Alternator drive belts for Porsche charging systems
- Engine cooling fan belts for air-cooled and auxiliary fan applications
- Power steering and hydraulic pump belts where fitted
- Auxiliary and accessory drive belts for ancillary components
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original belts all types. OE (Original Equipment) refers to parts matching original specifications for the belts all types and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM belts all types engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. Many owners search for genuine or OEM belts all types; these are direct-fit alternatives designed to match the original form, fit and function.
- Engine drive belts supporting alternator, fan and accessory operation
- Belts covering a variety of Porsche model generations and engine layouts
- Options to support standard maintenance, overhaul or refurbishment work
Belts on Porsche engines transmit drive from the crankshaft pulley to alternators, cooling fans, power steering pumps and other ancillaries. They must follow specified routing and tension to work correctly, and their condition has a direct impact on everyday usability. OEMatch focuses on belts engineered to match the original form, fit and function for Porsche applications, so they fit original mounting points and clearances and are compatible with factory systems where relevant.
- Supports consistent operation of charging and cooling systems
- Helps reduce the likelihood of belt slip under normal use when correctly tensioned
- Allows scheduled maintenance to be carried out using direct-fit replacements
- Provides options suitable for a variety of Porsche models and engine configurations
- Age-related hardening, glazing and cracking of rubber over time
- Incorrect belt tension causing excessive wear or noise
- Contamination from oil or coolant affecting belt material
Replacing tired or noisy belts on a Porsche is an important part of preventative maintenance. Fresh components help keep alternator output stable, maintain intended cooling performance and preserve steering assistance where applicable. Using OEMatch belts made to original-spec dimensions for consistent performance supports reliable day-to-day use and helps avoid unexpected disruption from belt-related issues.
- Components made to original-spec dimensions for consistent performance
- Direct-fit replacements engineered to match original dimensions and tolerances
- Fits original mounting points and clearances on Porsche applications
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.