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Musty AC Smell & Weak Airflow in 2022 RVR (Outlander Sport)

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Mike T. · rep 0 · May 25, 4:11 AM · 1 replies · solved · Question

Vehicle: 2022 Mitsubishi RVR SE

Hi everyone,

I have a 2022 Mitsubishi RVR (Outlander Sport in the US) SE with about 25,000 miles. Lately, I've noticed a really unpleasant musty, moldy smell coming from the AC vents when I turn it on, especially when it's been sitting for a bit. Also, the airflow doesn't seem as strong as it used to be, even on high settings.

I'm thinking it might be the cabin air filter, but I'm not sure where it's located or how to check/replace it. Is this a common problem for newer Mitsubishis? Any tips on what else could be causing the smell or weak airflow?

I'd like to try and fix this myself if it's not too complicated.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:11 AM

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ClearTheCode admin answer:

The musty smell and reduced airflow you're experiencing in your 2022 Mitsubishi RVR (Outlander Sport) SE are very common issues, and you're spot on—the cabin air filter is the most likely culprit. At 25,000 miles, it's definitely time to check or replace it, especially if you drive in dusty or polluted areas.

Here’s how to address it:

  1. Locate and Inspect the Cabin Air Filter:
    • In most Mitsubishi RVR/Outlander Sport models, the cabin air filter is located behind the glove compartment. You'll typically need to open the glove box, unclip or remove the dampener arm (if present), and then gently push in the sides of the glove box to allow it to swing down further.
    • Behind the glove box, you'll see a rectangular plastic housing or cover. Open this to reveal the cabin air filter. Pull it out and inspect it. It's likely clogged with leaves, dirt, dust, and other debris.
  2. Causes of Musty Smell & Weak Airflow:
    • Clogged Cabin Air Filter: The primary reason for both reduced airflow and a musty smell. A dirty filter restricts air movement and can trap moisture, leading to mold and mildew growth.
    • Moisture in HVAC System: Condensation from the AC system can sit in the evaporator core, promoting mold and bacterial growth, which causes the smell.
    • Blocked Drains: The AC system has a drain tube to remove condensation. If it's clogged, water can accumulate inside the HVAC housing.
  3. Replacement Interval: Cabin air filters are typically recommended for replacement every 15,000 to 30,000 miles, or at least once a year. Given your mileage, it's due.
  4. DIY Replacement:
    • Replacing the cabin air filter is one of the easiest DIY maintenance tasks. Once you've accessed the filter, simply note the airflow direction arrow on the old filter, insert the new filter with the arrow pointing in the same direction, and reassemble the glove box.
    • You can purchase a new filter from an auto parts store or a Mitsubishi dealership. Consider an activated charcoal filter for better odor control.
  5. Addressing the Smell (if filter isn't enough): If the smell persists after replacing the filter, you might need an HVAC system cleaner/disinfectant spray. These products are sprayed into the fresh air intake or directly onto the evaporator to kill mold and bacteria. Follow product instructions carefully.

This is a straightforward fix that can significantly improve your in-cabin air quality and AC performance.

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