Description
The heating and air-conditioning blower for Citroën C5 and Peugeot 407 is designed for mid-size vehicles, ensuring correct air circulation in the cabin and efficient heating and cooling. With this part, the heating and air conditioning operate smoothly without fan speed fluctuations or unwanted noises from the dashboard area.
This replacement heating and A/C blower is a direct-fit solution for technicians and DIY enthusiasts looking to restore cabin airflow and eliminate rattles or inconsistent fan performance. Commonly searched by part numbers, the blower delivers stable ventilation across all fan speed stages and helps maintain interior comfort during heating and cooling cycles. Ideal for garages and independent workshops, the unit is compatible with standard HVAC assemblies used on Citroën C5 and Peugeot 407 vehicles.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C5 II, Peugeot 407
- Product Codes: 4PUH-18456-AF, 4PUH-18456-BA, 6441S3
- Other Numbers: NFP
Compatibility And Application
Fits mid-size vehicles from the Citroën and Peugeot lineups, specifically second-generation Citroën C5 (C5 II) and Peugeot 407 models equipped with the original HVAC blower assembly. Verify part numbers when searching or ordering, as fitment is frequently referenced by the OEM code.
Function
The blower motor forces air through the climate system’s heat exchanger and evaporator, providing cabin ventilation, heating and cooling. It ensures consistent airflow at the selected fan speed and prevents the HVAC system from producing unwanted noise or intermittent operation.
Installation Recommendations
- Always disconnect the vehicle battery before starting work and follow the manufacturer’s safety instructions.
- Typical installation involves removal of the glovebox or lower dash trim to access the blower housing. Tools commonly required: Torx bits, Phillips screwdriver, and a small socket set.
- Disconnect electrical connector(s), remove mounting screws or clips securing the blower, extract the old unit and install the replacement in reverse order. Ensure proper seating of the blower and secure all fasteners to spec.
- Before reassembly, check the condition of the cabin air filter and the blower resistor / fan speed controller if present. Test blower operation at all speeds before reinstalling trim.
- Allow an experienced technician to perform the replacement if access is restricted or if additional diagnostics are required.
Why It Fails
- Wear Of Brushes Or Bearings: Over time brushes and bearings wear, causing reduced performance, noise, or total failure.
- Debris And Congestion: Leaves, dust or foreign objects in the intake can jam the fan wheel and damage the motor.
- Moisture Ingress: Water entering the HVAC housing can corrode components and shorten motor life.
- Electrical Faults: Poor connector contacts, damaged wiring or a failing blower resistor/controller can produce intermittent operation or loss of speed control.
- Typical Service Life: Depending on usage and environmental conditions, blower motors commonly last 8–12 years (or roughly 100,000–200,000 km). Heavy use and contaminated cabin air accelerate wear.
Additional Notes
This blower unit is often located and ordered by its OEM part number; check the stamped or printed code when replacing components. After installation, verify quiet operation across all speeds and inspect for any unusual vibration or contact with the housing. Replacing the cabin air filter at the same time reduces the chance of early recontamination.
