The dash blower fan in a 1971 Porsche 911 is a crucial component of the heating and ventilation system. Over time, these fans can wear out, leading to reduced airflow or complete failure. When it’s time for a replacement, the Uro Parts dash blower fan is a popular aftermarket option. This guide covers everything you need to know about the part, from its function to installation considerations, so you can decide if it’s the right choice for your classic 911.
Shop on Amazon
Browse the latest options and prices.
URO Parts 91157132032 Blower Motor
Understanding the Dash Blower Fan in a 1971 Porsche 911
The dash blower fan, also known as the heater blower motor, pushes air through the heater core and into the cabin. In the 1971 911, this fan is located under the dashboard on the passenger side. It operates on multiple speeds, controlled by a switch on the dashboard.
What Does the Dash Blower Do?
The primary role of the dash blower fan is to circulate air for defrosting the windshield and providing cabin heat. Without a functional fan, the heater and defroster become ineffective, which can be a safety issue in cold or rainy weather. The fan also helps with ventilation when the heater is not in use.
Common Signs of Failure
- No airflow when the fan is turned on, even at high speed.
- Unusual noises such as squealing, grinding, or rattling from under the dash.
- Intermittent operation or only working on certain speeds.
- Burning smell from the motor overheating. If you experience any of these symptoms, it’s time to inspect and likely replace the blower fan.
Why Choose Uro Parts for Your Replacement?
Uro Parts is a well-known aftermarket supplier for European car components, including classic Porsche models. Their dash blower fan for the 1971 911 is designed as a direct replacement for the original Bosch unit.
Uro Parts vs. OEM
Original equipment manufacturer (OEM) fans from Porsche are no longer available or are prohibitively expensive. Uro Parts offers a cost-effective alternative that matches the original specifications. While OEM parts may have a reputation for longevity, Uro Parts has improved on some design aspects, such as using modern materials for the motor and fan blade.
Build Quality and Fitment
The Uro Parts fan is made with a balanced wheel and sealed bearings to reduce noise and extend service life. It mounts directly to the original housing without modification. Owners report that it fits well in the tight space under the dash, though some may require slight adjustment of the mounting bracket.
Pricing and Value
Compared to NOS (new old stock) OEM fans, Uro Parts is significantly cheaper—often half the price or less. Given that many original fans from the 1970s have already failed, a new aftermarket fan from Uro Parts provides good value for the money. It is a practical choice for daily drivers and restoration projects where budget matters.
Installation Considerations
Replacing the dash blower fan in a 1971 911 is a moderately difficult job. It requires patience and basic mechanical skills.
Tools and Preparation
You will need: socket set, screwdrivers (Phillips and flathead), possibly a small pry tool, and a shop vacuum for debris. Disconnect the battery before starting to avoid short circuits. Have a replacement gasket or foam seal on hand, as the old one may be deteriorated.
Step-by-Step Overview
- Remove the passenger side kick panel and under-dash trim.
- Disconnect the electrical connector from the fan.
- Unbolt the fan housing from the heater box (usually three or four bolts).
- Carefully extract the fan assembly. Note the orientation of the fan wheel.
- Install the new Uro Parts fan by reversing the removal steps. Ensure the fan spins freely and the wiring is routed away from moving parts.
- Reconnect the battery and test all fan speeds.
Potential Challenges
- Limited access: The area under the dash is tight. Removing the glove box may provide more room.
- Stuck fasteners: Rust or age can make bolts difficult to remove. Use penetrating oil and patience.
- Electrical compatibility: The Uro Parts fan uses the same plug as the original, but check that the wires are not brittle. Replace connectors if needed.
If you are not comfortable with this level of work, consider having a classic Porsche specialist perform the installation.
Final Recommendation
For owners of a 1971 Porsche 911 needing a dash blower fan replacement, Uro Parts is a solid choice. It offers reliable performance at a reasonable price, fitting without major modifications. While it may not have the cachet of an OEM part, it gets the job done effectively. If you prioritize originality and have the budget for a NOS unit, that option remains, but for most drivers, the Uro Parts fan provides excellent value. Just ensure you follow proper installation steps and replace any worn seals to prevent air leaks.
Whether you’re restoring a 911 or just keeping it on the road, a working dash blower fan is essential for comfort and safety. The Uro Parts unit is a practical solution that has proven itself in the classic Porsche community.