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Musty Smell in 2018 Model 3 - Time for Cabin Air Filter?

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Steve N. · rep 0 · May 22, 5:26 AM · 1 replies · solved · Question

Vehicle: 2018 Tesla Model 3 Long Range

Hey everyone,

I've been noticing a persistent musty smell coming from the vents in my 2018 Tesla Model 3 Long Range, especially when the AC first kicks on. It's been getting worse over the last few months, and I also feel like the airflow isn't as strong as it used to be.

I've heard that cabin air filters can cause this. Is this a common issue for Model 3s of this vintage? I'm pretty handy and usually do my own maintenance when possible. Is replacing the cabin air filter a DIY job for a 2018 Model 3, or should I just take it to a service center?

Any tips or guides would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

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

0

ClearTheCode admin answer:

Yes, a musty smell and reduced airflow are classic symptoms of a clogged or dirty cabin air filter in your 2018 Tesla Model 3. This is a very common maintenance item for all vehicles, including Teslas, and is definitely a DIY-friendly task.

Causes:

  1. Accumulation of Debris: Over time, the filter traps dust, pollen, leaves, and other airborne particles, reducing airflow.
  2. Moisture and Mold: Trapped moisture within the filter media can lead to mold and mildew growth, causing the musty odor.

When to See a Shop:

  • If the musty smell persists after replacing the filters, it might indicate a deeper issue within the HVAC system, such as mold growth on the evaporator coil, which requires professional cleaning.
  • If you encounter any difficulty or damage during the replacement process.

Steps for Replacement:

  1. Purchase Filters: You'll need two new cabin air filters (HEPA filters are often recommended for better air quality). Ensure they are compatible with your 2018 Model 3.
  2. Access: The filters are located behind the glove box. You'll need to remove the passenger side under-dash panel and then the glove box itself. This involves removing a few screws and clips.
  3. Remove Old Filters: Once the glove box is out, you'll see the filter housing cover. Remove the cover and carefully pull out the two old filters. Note their orientation.
  4. Clean: It's a good idea to vacuum any debris from the filter housing before installing the new ones.
  5. Install New Filters: Insert the new filters, ensuring they are oriented correctly (airflow arrows usually point towards the rear of the vehicle).
  6. Reassemble: Replace the filter housing cover, reinstall the glove box, and then the under-dash panel.

This process typically takes 30-60 minutes for a first-timer. Regular replacement (every 1-2 years or 12,000-24,000 miles, depending on your environment) will help maintain optimal air quality and HVAC performance in your Tesla.

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