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DIY Cabin Air Filter Replacement on my 2019 Model 3 – Stinky AC!

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

Vehicle: 2019 Tesla Model 3 Long Range

Hey everyone,

My 2019 Tesla Model 3 Long Range has developed a bit of a musty smell coming from the AC vents, especially when I first turn it on. I've read that replacing the cabin air filters can help with this. I'm pretty handy and want to tackle this myself.

Has anyone done this recently? Are there any tricky parts or special tools required? I've watched a few videos, but they sometimes skip over the nuances. Just want to make sure I don't break any clips or wires. Any tips or advice would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

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

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ClearTheCode admin answer:

Replacing the cabin air filters in your 2019 Tesla Model 3 is a common and recommended DIY maintenance task, especially if you're experiencing musty odors. Tesla recommends replacing them every 2 years or 24,000 miles, whichever comes first.

Causes of Musty Odor:

  1. Clogged Filters: Over time, the filters accumulate dust, pollen, and other debris, restricting airflow and creating a breeding ground for mold and mildew.
  2. Moisture Buildup: In humid climates, moisture can collect on the evaporator coils, contributing to microbial growth if not properly dried.

Step-by-Step Replacement Guide:

  1. Prepare: Park your vehicle on a level surface. You'll need a T20 Torx bit, a trim removal tool, and new cabin air filters (Tesla recommends HEPA filters).
  2. Access Panel: Open the front passenger door. Locate the trim panel under the glove box. Use your trim removal tool to carefully pry off the right side panel and then the main under-glovebox panel. Disconnect any electrical connectors (e.g., for the footwell light or speaker).
  3. Remove HVAC Duct: You'll see an HVAC duct. Remove the two T20 Torx screws securing it and carefully pull it out of the way.
  4. Filter Access Door: Locate the filter access door. There's a single T20 Torx screw holding it. Remove the screw and pull the door open.
  5. Remove Old Filters: The Model 3 uses two filters. Carefully slide out the old filters, noting their orientation (usually an arrow indicating airflow direction).
  6. Install New Filters: Insert the new filters, ensuring they are oriented correctly (airflow arrow typically points towards the front of the vehicle). Make sure they slide in smoothly and are fully seated.
  7. Reassemble: Replace the filter access door and secure it with the T20 screw. Reinstall the HVAC duct, securing its screws. Reconnect any electrical connectors and snap the trim panels back into place.

When to See a Shop: If the musty smell persists after replacing the filters, or if you notice water leaking into the cabin, it might indicate a more serious issue with the HVAC system, such as a clogged condensate drain or a failing evaporator. In such cases, it's best to schedule a service appointment with Tesla or a specialized EV repair shop.

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