Parts for your 2003 Mitsubishi Pajero-Air filter

2003 Mitsubishi Pajero Air Filter — what it does and when to change it

An engine air filter is absolutely fitted to every 2003 Mitsubishi Pajero, across both petrol V6 and 3.2 Di‑D diesel variants. This is documented in the Mitsubishi Pajero NM/NP Owner’s Manual and Workshop Manual (engine “air cleaner” section), and corroborated by major filter catalogues commonly used in Australia and New Zealand service workshops. So yes—this Pajero uses a replaceable air filter element housed in a sealed airbox under the bonnet.

The air filter’s job is simple but critical: it stops dust, sand and grit from entering the engine while letting enough clean air through for strong performance and good fuel economy. A healthy filter helps the mass‑airflow readings stay accurate, trims smoke on the diesels, and keeps throttle response crisper on the petrols. For a 4x4 that often sees corrugations, red dirt, or beach runs, it’s one of the most important bits of preventative maintenance going.

On the 2003 Pajero, the panel-style element sits inside the airbox with clip-on or screw-fastened access. Mitsubishi’s logbook schedule calls for regular inspection at each service, with replacement typically around 15,000–20,000 km or 12 months—earlier if you’re driving in dusty, rural, or off‑road conditions. If the vehicle spends time on outback roads or towing, checking the filter more often is cheap insurance against accelerated engine wear.

Clues the filter’s due include a noticeable drop in grunt, higher fuel use, a richer smell or light smoke (especially on Di‑D), or a muffled intake note. Don’t wait for obvious symptoms if you’re heading on a trip—start fresh and keep a spare in the cargo area.

• Pop the airbox clips, lift the lid and note the filter’s orientation.
• Wipe out the airbox—don’t let debris fall into the intake.
• Avoid blasting with high‑pressure air, it can tear the paper pleats.
• Refit a quality OEM‑spec element, seat the gasket evenly, and secure the lid.
• If running an oiled performance filter, go light on oil to avoid MAF contamination.

Using reputable brands that meet or exceed Mitsubishi specs keeps the Pajero’s engine breathing clean, protects turbochargers on Di‑D models, and helps maintain that smooth, dependable touring feel owners love.

Popular questions

Where is the air filter on a 2003 Pajero?
It sits in the black plastic airbox under the bonnet. On most AU/NZ right‑hand‑drive models it’s on the passenger side, fed by a snorkel duct from the front guard area. Release the clips or screws, lift the lid, and the panel filter lifts straight out.

How often should the Pajero air filter be replaced?
Inspect at every service. For mixed city/highway use, plan on 15,000–20,000 km or 12 months. If you’re in dusty conditions, beach work, or long gravel stretches, check it more frequently and replace whenever the pleats look loaded or airflow feels restricted.

Do petrol and diesel Pajeros use the same filter?
They use similar panel‑style elements but part numbers can differ between engines and build dates. Always match to VIN or engine code (e.g., 3.2 Di‑D vs V6). The housing design is the same principle: a sealed box with a drop‑in element that’s quick to service.