Description
Carbon Filter, Active Charcoal For Citroën C4 And Peugeot 307
This activated charcoal carbon filter is designed for Citroën C4 and Peugeot 307 ventilation systems, providing effective removal of unpleasant odors, harmful gases and fine particles from the passenger compartment. Supplied under part code 1502F9, the filter improves cabin air quality and passenger comfort — especially important for technicians and DIY enthusiasts who prioritise health, clear airflow and long-term HVAC performance. Ideal replacement when you notice reduced airflow, persistent odors or increased dust inside the vehicle.
Technical Information
Function
The active charcoal element adsorbs volatile organic compounds (VOCs), exhaust and traffic-related odors, and other gaseous pollutants that standard paper cabin filters cannot trap. In combination with particulate filtration, this element helps reduce smells, improve air freshness and contribute to a healthier cabin environment for drivers and passengers.
Replacement And Installation
Location: Typically installed as the cabin air filter in the HVAC intake, commonly accessed behind the glovebox or under the windshield cowl depending on the vehicle configuration.
Basic Replacement Steps (general guide for experienced mechanics and competent DIYers):
- Open and, if required, lower or remove the glovebox to access the filter housing.
- Release the filter housing clips or cover and carefully extract the old filter, noting its orientation and airflow arrow.
- Clean the filter seat and remove debris from the housing and surrounding drains to prevent premature clogging of the new filter.
- Insert the new activated charcoal filter with the correct orientation and secure the housing cover and glovebox.
- Start the blower and check for normal airflow and absence of rattles or leaks around the housing.
Recommended Interval: Replace typically every 15,000–30,000 km (or at least once a year), but shorten the interval in high-pollution or dusty environments or if occupants notice odors or allergy symptoms.
Why The Part Most Often Fails
Primary causes of degradation are clogging with dust, pollen and debris, and saturation of the charcoal material with odours and gaseous pollutants. Moisture ingress and contaminated drainage in the intake area can also reduce effectiveness or cause mould and odour problems. Mechanical damage to the housing or incorrect installation can lead to bypass and reduced filtration efficiency.
Installation Recommendations
- Always Verify Correct Fitment: Ensure the filter matches the vehicle model and part number 1502F9 before installation.
- Maintain Clean Housing: Remove leaves and debris from the intake area and housing to extend filter life.
- Observe Orientation: Install the filter according to the airflow arrow; incorrect orientation reduces performance.
- Avoid Force: Do not compress the filter and ensure seals and clips engage properly to prevent air bypass.
- Check HVAC Operation: After replacement, run the ventilation system across all modes to confirm correct airflow and absence of noise.
This active charcoal cabin filter is a practical upgrade for vehicle comfort and air quality, commonly sought under the product code 1502F9 for Citroën C4 and Peugeot 307 models. Suitable for professional workshops and competent home mechanics looking for a reliable cabin air solution.
