Alternator fan / impeller housing strap. Porsche 911 / 914 / 964  ❭  96410625120

Alternator fan / impeller housing strap.
Genuine Porsche Original Equipment (OE) alternator fan / impeller housing strap. It is a factory-engineered mounting bracket that secures the alternator cooling fan (or impeller housing) to the engine, ensuring proper alignment, stability, and airflow within the cooling and charging subsystem of classic Porsche air-cooled engines.

Fit:
Porsche 911 1965 - 1989
Porsche 911 (930) Turbo 1975 - 1989
Porsche 964 Turbo 3.3L / Turbo 3.6L 1991 - 1994
Porsche 914-6 1970 - 1976

Diagram ref no 2

The alternator fan / impeller housing strap holds the fan assembly in correct alignment with the engine’s accessory drive system. By securing the fan housing, it ensures proper belt tension, efficient cooling airflow, reliable alternator operation, and accurate interaction with other engine accessories. Its structural role helps minimize vibration, reduces belt misalignment, and contributes to consistent engine cooling performance.

Function:
Installed in the engine bay between the alternator fan housing and a fixed mounting point on the engine block or accessory bracket, this OE strap:
• Provides rigid support for the alternator cooling fan assembly
• Maintains precise belt alignment for the fan pulley and accessory drive
• Helps resist engine vibration and torque loads
• Contributes to efficient engine cooling airflow.

An original fan strap that is bent, corroded, or fatigued can cause belt misalignment, fan wobble, excessive vibration, or premature wear on pulleys and accessories. Because the alternator cooling fan plays a vital role in air-cooled engine temperature control and charging system reliability, a secure and correctly aligned fan assembly is essential. Replacing a damaged or worn strap with a Genuine Porsche OE part ensures factory-correct support, preserves cooling efficiency, and helps prevent secondary failures in belts, bearings, or adjacent components.

When to replace:
• When the original strap is bent, cracked, or corroded
• After alternator or cooling fan service
•  If the fan belt shows uneven wear or misalignment
• During engine restoration or reassembly
• If vibration/noise from the cooling fan area indicates movement

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Related, superseded, cross reference or alternative numbers for comparison.

96410625120

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