Description
Heater and air conditioning blower fan for Citroën C5 II and Peugeot 407.
This genuine-style blower motor is designed for use in Citroën C5 II and Peugeot 407 HVAC systems, restoring reliable airflow for heating and air conditioning. Ideal for professional workshops and DIY mechanics, the unit is commonly searched by product codes (4PUH-18456-BA, 4PUH-18456-AF, 6441S3). Replacing a failing blower fan brings back proper cabin ventilation, prevents overheating of the HVAC resistor and improves overall climate comfort.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C5 II, Peugeot 407
- Product Codes: 4PUH-18456-BA, 4PUH-18456-AF, 6441S3
- Other Numbers: NFP (as listed)
- Operating Voltage: 12V (vehicle electrical system)
Application And Fitment
Fits Citroën C5 II and Peugeot 407 models equipped with the original HVAC blower assembly that uses the above product codes. Commonly used as a direct replacement for failed or noisy blower units in passenger cabins. Always check the part code against the existing unit for exact compatibility.
Function
The blower fan forces air through the heater core and evaporator to provide cabin heating, ventilation and air conditioning. Fan speed is typically controlled via a blower resistor or electronic blower control module; if the motor fails, airflow will be reduced or cut out entirely.
Most Common Reason For Failure
Blower motors usually fail due to worn carbon brushes and bearings, accumulation of debris (leaves, dust) that jams the fan wheel, water ingress or corrosion of electrical contacts. Excessive heat from a blocked cabin filter or a failing resistor can accelerate wear. Symptoms include unusual noise, reduced airflow or intermittent operation.
Replacement Guide
- Prepare: Park vehicle on level ground and ensure ignition off.
- Safety: Disconnect the negative battery terminal before starting work.
- Access: Locate the blower motor—typically under the passenger-side dashboard or behind the glovebox. Remove trim panels or glovebox as required.
- Disconnect: Remove the electrical connector and any retaining screws or clips holding the blower housing.
- Remove: Extract the old blower motor assembly and inspect the fan wheel and housing for debris.
- Install: Fit the replacement unit, secure mounting screws, reconnect electrical connector and reassemble trim.
- Test: Reconnect the battery, run the HVAC system through all fan speeds and check for smooth operation and absence of noise.
Installation Recommendations
- Always Disconnect The Battery Before Removing Electrical Components.
- Inspect And Replace The Cabin Filter When Replacing The Blower To Prevent Recontamination.
- Check Blower Resistor And Fuses If The New Unit Does Not Operate Correctly.
- Clean Debris From The Blower Housing And Air Intake To Extend Motor Life.
- Use Correct Fasteners And Avoid Over-Tightening Plastics To Prevent Damage.
- Allow Adequate Time For Access—Replacement Typically Takes 0.5–1.5 Hours Depending On Vehicle Trim And Experience.
Why Choose This Part
Supplied with OEM-referenced product codes for easy identification, this blower fan restores reliable cabin airflow and is a cost-effective repair for noisy or failed HVAC fans. Suitable for both professional garages and competent DIY enthusiasts who follow safe working procedures.
