Are there any visual indicators that the air filter needs replacement in a Tesla Model 3

1. The filters appear dirty or clogged with dust and debris when you inspect them after removing the access panel [3][5]. The search results show the filters can accumulate dirt over time, indicating they need to be replaced.

2. The pleats in the filters may appear compressed or flattened, suggesting they are no longer effectively filtering air [5]. The filters should be replaced when they start to look worn out.

3. There may be a noticeable decrease in airflow from the vents, which can indicate the filters are restricting air circulation and need to be changed [3]. A drop in cabin air quality or a "funky" smell could also signal the filters need replacement.

The search results do not mention any other specific visual indicators, such as warning lights or notifications on the Tesla's display. The main way to determine if the cabin air filters need replacing is to physically inspect them when accessing the filter compartment behind the glove box. Tesla recommends replacing the cabin air filters every 2 years to maintain optimal performance.