Why Does My Tesla Smell Musty? The Cabin Air Filter Drain Hole Fix You Need

If your Tesla has developed a musty or mildewy smell that a cabin air filter replacement hasn't fixed, moisture collecting over the HVAC drain hole is likely the culprit. This simple, cleverly designed clip attaches to the bottom cabin air filter — positioned 4.25 inches from the tabbed side — and prevents water from pooling over the drain. The result: a drier filter, a healthier HVAC system, and fresh-smelling cabin air.