Where is the air conditioning filter of Peugeot 408 located?

[VanKiara]

The air conditioning filter of Peugeot 408 is located inside the panel on the left side of the passenger foot mat. The air conditioning filter should be replaced every 20,000 kilometers. If driving in harsh environments, it is recommended to shorten the replacement interval. Function of the air conditioning filter: It filters impurities, tiny particles, pollen, bacteria, industrial exhaust, dust, etc., from the air entering the cabin from the outside, improving air cleanliness, preventing these substances from damaging the air conditioning system, and providing a good air environment for passengers. Maintenance of the air conditioning filter: If the filter is dirty, clean it by blowing compressed air from the reverse side. Hold the air gun 5 cm away from the filter and blow at a pressure of 500 kPa for about 2 minutes. The air conditioning filter is prone to accumulating dust; use compressed air to blow away loose dust. Never wash it with water, as this can easily ruin it. Poor maintenance of the air conditioning filter can lead to the accumulation of dust and dirt on the filter plate, radiator, evaporator, and fin surfaces, causing airflow blockage. Additionally, the air conditioning's cooling and heating efficiency will decline, increasing power consumption and noise, and reducing the air conditioning's lifespan. Impact of not replacing the air conditioning filter on drivers: Long-term use without replacement can cause impurities on the filter to mold, producing bacteria and odors, which can harm the health of drivers and passengers and even induce respiratory diseases. Impact of not replacing the air conditioning filter on the engine: If the air filter is severely blocked, it will increase intake resistance, reducing engine power, worsening engine operation, increasing fuel consumption, and accelerating engine wear and carbon buildup. Precautions for replacing the air conditioning filter: Purchase air conditioning filters from reputable manufacturers, and carefully check and compare their appearance and size. Ensure the vehicle is turned off before replacing the filter. When loosening screws and removing clips, apply appropriate force. Pay attention to the installation direction of the filter to avoid installing it backward. After installation, check if the filter is properly installed, ensuring the filtering surface covers the entire air duct and fits tightly around the edges. Otherwise, filtration may fail. Precautions for using car air conditioning: Do not turn on the heating air conditioning immediately when warming up the car in the morning. Wait until the engine coolant temperature rises before turning on the air conditioning. Do not set the air conditioning temperature too high. Prolonged exposure to excessive heat can cause drowsiness and affect driving. Also, avoid directing warm air directly at the face. If the windows fog up after turning on the heating, increase the fan speed and let it blow for a while longer to eliminate the fog and prevent it from recurring. During long drives, ventilate the cabin periodically. Poor air circulation in a confined space can lead to breathing difficulties over time. Turn off the air conditioning before parking and switch to external circulation with natural air to clean the air conditioning system's ducts and prevent bacterial growth.

[AidenAnn]

Last week, I replaced the cabin air filter of my Peugeot 408 by myself. It's located under the dashboard on the passenger side, near the footwell. The process was quite straightforward—you just need to open the passenger door, empty the glove compartment, and then remove a plastic cover on the inner side of the glove box by unscrewing a few clips with your hands or a Phillips screwdriver. The filter is hidden behind it. The placement is well-designed, unlike some car models that make it a hassle. I changed the filter because the old one was too dirty. Last year, when I didn't replace it, the AC airflow weakened and started to smell bad. With the new filter, the air became noticeably fresher right away. The whole process took about 10 minutes, and even beginners can learn it by watching YouTube tutorials—just a screwdriver is needed. I recommend replacing it every 15,000 km or once a year. Don’t slack off—a dirty filter reduces cooling efficiency, wastes fuel, and increases allergy risks. If you're handy, DIY saves money (online filters cost just a few dozen yuan). If you're unsure, visit a dealership—they know the process well and charge reasonably (around 100 yuan). Proper maintenance extends the AC's lifespan and significantly improves cabin air quality.