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Musty Smell in My 2020 Model 3 - Time for Cabin Air Filter?

0

Mike T. · rep 0 · May 25, 4:03 AM · 1 replies · solved · Question

Vehicle: 2020 Tesla Model 3 Long Range

Hey everyone,

I've been noticing a pretty strong musty, almost mildew-like smell coming from the vents in my 2020 Tesla Model 3 Long Range, especially when the AC first kicks on. It's really noticeable and makes the cabin feel less fresh.

I'm thinking it might be time to replace the cabin air filters. Is this a common issue with Model 3s around this age? I've heard it can be a bit tricky to get to them.

Has anyone done this DIY? What tools did you need, and how difficult was it on a scale of 1-10? Also, any specific brand recommendations for replacement filters? Thanks in advance for any tips!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:03 AM

0

ClearTheCode admin answer:

Yes, a musty smell from the HVAC system is a very common indicator that your cabin air filters are due for replacement, especially in a 2020 Tesla Model 3. Over time, dust, pollen, and moisture can accumulate on the filters, leading to mold and mildew growth.

Causes:

  • Accumulation of dust, pollen, and debris on the filter media.
  • Moisture trapped in the HVAC system, promoting mold growth.
  • Infrequent filter replacement (Tesla recommends every 2 years or 25,000 miles, but climate and usage can shorten this).

DIY Replacement Steps:

  1. Preparation: Park on a level surface, engage parking brake, and turn off the vehicle. Open the passenger front door fully.
  2. Access: You'll need to remove the passenger side under-dash trim panel. This usually involves removing a few push clips and possibly a screw or two. Gently pull down on the panel to release it.
  3. Locate Filter Housing: Once the trim is off, look towards the center console side, near the floor. You'll see a rectangular plastic cover – this is the cabin air filter housing.
  4. Remove Old Filters: Unclip or unscrew the housing cover. Inside, you'll find two stacked rectangular filters. Carefully pull out the old filters, noting their orientation.
  5. Install New Filters: Insert the new filters, ensuring the airflow arrows (if present) point towards the rear of the vehicle. Make sure they are seated correctly.
  6. Reassembly: Reattach the filter housing cover, then reinstall the under-dash trim panel.

Tools Needed:

  • Plastic trim removal tool (recommended to avoid scratches)
  • Small flathead screwdriver or panel clip remover
  • T20 Torx bit (for some models/trim pieces)

When to See a Shop: If after replacing the filters the smell persists, or if you're uncomfortable with the DIY process, it's best to have a Tesla Service Center or qualified independent shop inspect the HVAC system. There might be a deeper issue like a clogged drain line or excessive mold growth requiring a professional cleaning or evaporator treatment. This is generally a moderate difficulty DIY (4/10) for someone comfortable with basic car maintenance.

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