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Musty Smell & Weak AC in 2020 Model 3 - Time for Cabin Filter?

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Sarah K. · rep 0 · May 22, 5:26 AM · 1 replies · solved · Question

Vehicle: 2020 Tesla Model 3 Long Range

Hey everyone,

I've been noticing a persistent musty smell coming from the vents in my 2020 Tesla Model 3 Long Range lately. On top of that, the AC airflow seems a bit weaker than it used to be, even on higher fan settings. I've had the car for about three years now.

Is this a classic sign that my cabin air filters need replacing? I've heard it's a common maintenance item for Teslas. How difficult is it to do myself? Are there any specific tools or tricks I should know before attempting it? Any advice would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:26 AM

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ClearTheCode admin answer:

Yes, a musty smell and reduced airflow are strong indicators that your 2020 Tesla Model 3's cabin air filters need to be replaced. Over time, these filters can accumulate dust, pollen, leaves, and moisture, leading to bacterial growth and restricted airflow.

Causes:

  • Accumulation of dirt, dust, pollen, and other airborne particles.
  • Moisture trapped in the filter media, promoting mold and mildew growth.
  • Normal wear and tear; filters have a finite lifespan.

DIY Replacement Steps:

  1. Purchase the Correct Filters: Ensure you get the correct HEPA-rated cabin air filters for your Model 3. Tesla recommends replacing them every 2 years or 24,000 miles, whichever comes first.
  2. Access the Filters: The cabin air filters in the Model 3 are located behind the glove box. You'll need to remove the passenger-side under-dash panel and then the glove box itself.
  3. Tools: You'll typically need a trim removal tool, a 10mm socket, and a T20 Torx bit.
  4. Removal: Carefully disconnect any electrical connectors, unbolt the glove box, and then you'll see the filter housing cover. Remove the cover and pull out the old filters. Note their orientation.
  5. Installation: Insert the new filters, ensuring the airflow arrows point in the correct direction (usually towards the rear of the vehicle). Reinstall the housing cover, glove box, and under-dash panel.
  6. Test: Turn on your HVAC system to check for improved airflow and the absence of the musty smell.

When to See a Shop:

  • If the musty smell or poor airflow persists after replacing the filters, there might be a deeper issue with the HVAC system, such as a clogged drain tube or a failing blower motor.
  • If you're uncomfortable with the DIY process or encounter difficulties, a Tesla Service Center or a reputable independent shop can perform the replacement.
  • No specific OBD codes are typically associated with a clogged cabin air filter, as it's a mechanical restriction rather than an electronic fault.
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