Heater blowers
Air con & heater blower fan resistor. Porsche Boxster / Cayman / 996 / 997
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13

Fits:
For cars with air conditioner (option code: 573)
Porsche 986 Boxster 1998-04
Porsche 987.1 Boxster 2005-08
Porsche 987.2 Boxster 2009-12
Porsche 987C.1 Cayman 2005-08
Porsche 987C.2 Cayman 2009-12
Porsche 996 1998-05
Porsche 997.1 2005-08
Porsche 997.2 2009-12
Click 'Zoom in' for large parts diagram.
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99657392300
The product you are viewing cross references to these numbers
Shop Securely
12 Month Warranty
Worldwide Delivery
Air con & heater blower fan resistor. Porsche Boxster / Cayman / 996 / 997
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13

Fits:
For cars with air conditioner (option code: 573)
Porsche 986 Boxster 1998-04
Porsche 987.1 Boxster 2005-08
Porsche 987.2 Boxster 2009-12
Porsche 987C.1 Cayman 2005-08
Porsche 987C.2 Cayman 2009-12
Porsche 996 1998-05
Porsche 997.1 2005-08
Porsche 997.2 2009-12
Click 'Zoom in' for large parts diagram.
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99657392300
The product you are viewing cross references to these numbers
Shop Securely
12 Month Warranty
Worldwide Delivery
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.