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https://autopapyrus.com/guides/wuling/hongguang-mini-ev/installing-a-hepa-cabin-air-filter/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Wuling Hongguang Mini EV (1st generation): Installing a HEPA Cabin Air Filter

The Wuling Hongguang Mini EV does not come from the factory with a cabin air filter. The climate control air intake has no designated place for a filter element. Owners in dusty regions install an external filter on the air intake on the passenger side. HEPA filters provide a high level of filtration, but because of the density of the material they can reduce the output of the stock blower by 15-25%. It is recommended to use medium-density automotive filters with activated carbon, which offer a good balance between filtration and airflow.

Difficulty: Medium Time: 30-40 minutes Steps: 9 Tools: flashlight, degreaser, clean rag

Part

  • 🔩 cabin air filter with HEPA or activated carbon (size must be matched to the air intake; typical Chinese-market filters are 150×200 mm). Mounting kit: 3M VHB double-sided tape or plastic brackets with clips

Step by step

9 steps
  1. Open the front passenger door, lean down under the instrument panel, and find the climate control air intake. It is located in the lower right part of the panel, deep behind the trim. Use a flashlight to light the area.
  2. Measure the opening of the air intake (typically 150×200 mm or close to that, depending on the body revision). Write down the length, width and shape of the opening so you can choose the right filter.
  3. Buy a ready-made filter for the Wuling Hongguang Mini EV (available online with mounting hardware included) or a universal automotive cabin air filter of the right size. If you choose HEPA, ask the seller for the filtration class (H10-H13) and the air permeability, so the blower can handle the airflow.
  4. Degrease the surface around the air intake with an isopropyl alcohol solution or a degreaser, and let it dry for 2-3 minutes.
  5. If you are using a ready-made kit with brackets, install the brackets around the perimeter of the air intake following the manufacturer's instructions (they usually snap on or attach with 3M VHB tape). If you are using a universal filter, apply 3M VHB double-sided tape around the perimeter of the air intake, leaving the protective film on the outer side.
  6. Peel the protective film off the tape and press the filter against the air intake, with the arrow or the "AIR FLOW" marking pointing toward the cabin. If there is no marking, put the smooth side facing out and the pleats facing in. Press along the perimeter for 10-15 seconds for full adhesion.
  7. Check the seal. There must be no gaps between the filter and the panel, or unfiltered air will bypass it.
  8. Turn on the climate control at medium blower speed and hold your hand up to the vents. You should feel airflow, although weaker than stock (a 15-25% reduction is normal with HEPA). If there is almost no airflow, the filter is too dense. Consider replacing it with a less dense one.
  9. Plan to replace the filter every 6-12 months, depending on driving conditions (more often on dusty roads, less often in a city environment). With a removable bracket design, taking out the cartridge takes 1-2 minutes and does not damage the adhesive layer.

Common mistakes and warnings

  • HEPA filters of class H13 and higher are very dense. The stock blower of the Hongguang Mini EV (low-powered, designed for a compact cabin) may not be able to overcome the resistance. This can lead to the blower motor overheating or to no airflow at all. It is recommended to use medium-density automotive filters with activated carbon (filtration class G3-G4 or H10). They trap dust, pollen and odors without a critical drop in airflow. If the blower starts to whistle or hum after you install a HEPA filter, replace the filter immediately with a less dense one, or the blower may fail.