Parts for your 2004 Mitsubishi Pajero-Cabin filter

2004 Mitsubishi Pajero cabin filter — fitted or not?

For Australian and New Zealand–delivered 2004 Mitsubishi Pajero (NP series), a factory cabin (pollen) filter generally wasn’t fitted. The HVAC box behind the glovebox was built with a provision for a “clean air filter” in some markets, but AU/NZ models of this era usually left the slot blanked off from the factory.

Technical basis for that call:

• Mitsubishi Pajero NM/NP Workshop Manual (circa 2000–2006), Group 55 Heater, Air Conditioning & Ventilation, describes a “Clean Air Filter — if equipped,” indicating it was market/trim dependent rather than standard fitment.
• Mitsubishi Motors ASA/EPC (Electronic Parts Catalogue) shows a filter carrier and elements for specific destination codes, while Australian right‑hand‑drive listings for NM/NP commonly show a blanking cover in the blower case instead of a filter set.
• Major aftermarket catalogues in AU/NZ list no cabin filter for Pajero NM/NP (2000–2006), and begin listing filters from NS (2006‑on), which aligns with owners’ service experience.

Why the 2004 Pajero in AU/NZ didn’t use a cabin filter:

• Market spec: Mitsubishi treated the clean‑air filter as an option on third‑gen Pajero. AU/NZ trims focused on durability and value, so many were delivered without it.
• Design trade‑offs: The cowl intake includes coarse screening to stop leaves and larger debris, and the large airflow demands for off‑road HVAC performance made a non‑filtered setup acceptable for the spec.
• Servicing simplicity: With no filter to replace, scheduled maintenance avoided an extra consumable in dusty, rural conditions where service intervals can be stretched.

Can a cabin filter be added? On many NP vehicles, yes. The blower housing behind the glovebox typically has a removable blanking plate where a filter carrier and elements can be installed. Genuine and aftermarket retrofit kits exist in some markets. Once fitted, treat it like any other cabin filter: check it every 12 months or 15,000 kilometres (more often if touring gravel roads or doing beach work), and replace when airflow drops or the media darkens with dust and pollen.

Where it’s been retrofitted, the filter helps trap pollen, soot and fine dust, keeps the evaporator cleaner for longer, and can reduce odours. For owners who spend time on unsealed roads, a quality particulate media can noticeably cut the dust load inside the cabin. If the slot isn’t present or the housing differs, a specialist auto‑air conditioning shop can confirm retrofit options for that specific VIN.

• Does a 2004 Mitsubishi Pajero have a cabin filter?
  Most AU/NZ NP‑series Pajeros weren’t factory‑fitted with a cabin (pollen) filter. The HVAC case often has a provision for one, but the slot is usually blanked from new.
• Can a cabin filter be retrofitted to a 2004 Pajero?
  Commonly, yes. A filter carrier and elements can be installed behind the glovebox where the blanking plate sits. Once added, plan on replacement every 12 months or 15,000 km, or sooner in dusty conditions.
• Where is the cabin filter located if fitted?
  It sits in the HVAC blower housing directly behind the glovebox. Drop the glovebox, remove the small access panel or blanking cover, and slide the filter elements in or out.