The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

Musty Smell & Weak AC in My 2020 Model 3 - Cabin Filter DIY?

0

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

My 2020 Tesla Model 3 Long Range has developed a bit of a musty smell when the AC runs, and I feel like the airflow isn't as strong as it used to be. It's been about two years since I last had any service done, and I'm wondering if the cabin air filters are the culprit.

I've heard that replacing them can be a bit tricky on the Model 3 due to their location. Is this something I can realistically tackle myself with basic tools, or should I just bite the bullet and schedule service with Tesla? What specific tools or parts would I need to order?

Any tips or common pitfalls to avoid would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

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

0

ClearTheCode guidance (Tesla · Maintenance & DIY)

Summary: For Musty Smell & Weak AC in My 2020 Model 3 - Cabin Filter DIY?, work through these steps on your 2016+ vehicle:

  1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
  2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
  3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
  4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
  5. Test the common fix — follow model-specific service procedures; one change at a time.
  6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: My 2020 Tesla Model 3 Long Range has developed a bit of a musty smell when the AC runs, and I feel like the airflow isn't as strong as it used to be. It's been about two years since I last had any service done, and I'm wondering if the cabin air filters are the culprit.

I've heard that replacing them can be a bit tricky on the Model 3 due to their location. Is this something I can realistically t…

This is educational guidance, not a substitute for hands-on diagnosis.

Menu

Help & account