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Heater blowers

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91162415103/1
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Product Information
Rear heater blower unit, with steel housing. Fits in the engine bay.
The 91162415103 rear heater blower motor is a direct-fit replacement for the engine-compartment heater fan used on classic 911/930 models. It drives warm air from the heat exchangers forward to the cabin, restoring strong, reliable heating performance. 

Fits:
Porsche 911  2.7L / 3.0L  1974 - 1983

Diagram ref no 1

This later-style unit supersedes the earlier 911 624 151 02 design and is supplied complete with the correct housing/impeller layout for straightforward installation.

Mounted in the engine bay on the left side, it draws air through the heat exchangers and feeds the heater ducts; without a healthy motor, cabin heat output and demist performance drop sharply.

Age and heat can seize bearings, burn brushes, or crack housings—leading to weak/no airflow, noisy operation, or blown fuses. Replace during HVAC refresh or whenever the fan is noisy/inoperative to restore safe demisting and cabin heat.

•  Replaces: Porsche 911.624.151.03 / 911.624.151.02
•  Position: Engine bay – left-hand side
•  Function: Draws warm air from heat exchangers and delivers it into cabin ducts
•  Installation: Direct-fit replacement – no modifications required
•  Common Symptoms of Failure: No cabin heat, fan noise, burnt smell, blown fuse
•  Benefits: Restores cabin heating, correct airflow, and safe demisting performance

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91162415103
91162415103
91162415100

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90157192201/1
Product Information
Product Information
Sealing ring for blower motor for heater, foam.

dansk

Fits:
Porsche 911 2.0-3.3 01/63-07/89
Porsche 912 1.6 01/65-02/70

Click 'Zoom in' for large parts diagram
Diagram ref no 10

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90157192201
90157192201
1626150100

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PCG18701502
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Sheet metal screw B6,3x16
Fits onto hot air socket.

porsche

Fits:
Porsche 911 65-83 (right side hot air socket)
Porsche 911 84-89 (right side hot air socket and additional blower shroud)
Porsche 964 89-94 (left and right hot air socket)

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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PCG18701502
PCG18701502
90018701502

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91121127700
Product Information
Product Information
Support bracket additional engine blower. 

porsche

Fits:
Porsche 911 / 911S - 1975 to 1977
Porsche 911 Carrera 3.0ltr - 1976 to 1977
Porsche 911 SC - 1978 to 1983

Click 'Zoom in' for large parts diagram.
Diagram ref no 11



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91121127700
91121127700

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About Heater blowers

Porsche Heater Blowers | Reliable Cabin Heating & Airflow Performance

Heater blowers are the driving force behind your Porsche’s cabin heating system. They circulate warm air through the interior vents, distributing heat evenly and ensuring rapid defrosting and demisting during colder conditions. A properly functioning heater blower guarantees consistent cabin comfort and visibility no matter the season.

At Design911, we supply high-quality heater blowers engineered to meet or exceed original performance standards. Built using robust motors, balanced impellers, and heat-resistant materials, our blowers ensure smooth operation, low noise, and long-lasting reliability across all Porsche models.

Whether you’re restoring an air-cooled 911 or maintaining a modern Porsche with advanced HVAC systems, our heater blowers deliver dependable airflow and efficient heating for optimal comfort and safety.

What Do Heater Blowers Do?

The heater blower is a key component of your Porsche’s heating and ventilation system, ensuring a steady flow of warm air into the cabin.

Core Functions:

  • Circulates warm air through the heater core and into the cabin.
  • Defrosts and demists windows for safe driving visibility.
  • Distributes airflow evenly through multiple vent settings.
  • Works in conjunction with the climate control system for temperature precision.
  • Enhances cabin comfort during cold weather or damp conditions.

Without a functioning heater blower, air circulation is limited, leading to poor heating performance, fogged windows, and reduced climate control efficiency.

Why Do Heater Blowers Fail or Degrade?

Over time, heater blowers are subject to constant use, heat, and debris exposure, which can cause electrical or mechanical wear.

Common Causes of Failure Include:

  • Worn or burnt-out blower motor.
  • Debris or dust buildup in the fan impeller.
  • Electrical connection corrosion or short circuits.
  • Seized bearings causing noise or vibration.
  • Faulty resistors or speed control modules.

When failure occurs, you may notice weak airflow, inconsistent heating, strange noises, or complete loss of ventilation.

Why Replace Your Porsche Heater Blower?

Replacing a worn or faulty blower motor restores full airflow, heating efficiency, and reliable window defrosting. Upgraded blowers provide smoother operation and improved energy efficiency.

Key Benefits:

  • Restores proper cabin heating and ventilation.
  • Ensures rapid window demisting and defrosting.
  • Reduces noise and vibration from worn components.
  • Improves overall climate control system performance.
  • Designed for Porsche 911, Cayman, Boxster, Panamera, Macan, Cayenne, and classic models.
  • Ideal for regular servicing, HVAC repairs, or full restorations.

Replacing a heater blower at the first sign of failure prevents secondary electrical strain and extends the life of your heating system.

Highlights

  • Precision-engineered Porsche heater blowers for reliable airflow.
  • Quiet, efficient, and durable motor construction.
  • Direct-fit replacements for all Porsche heating systems.
  • Compatible with both manual and automatic climate systems.
  • Improves cabin comfort, defrosting speed, and safety.
  • Perfect for maintenance, performance upgrades, and restorations.       

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