When to change the cabin air filter

Short answer: most manufacturers suggest replacing the cabin air filter every 10,000–20,000 km or once a year. In dusty cities, heavy traffic or allergy season, every 6 months is common.

Signs of a clogged filter

• Weak airflow from the vents even on high
• A musty or sour smell when the A/C starts
• Windows fog up and clear slowly
• More sneezing inside the car

Why it's easy to forget

The filter is hidden behind the glovebox and has no warning light, so it often gets replaced only when a shop mentions it. Writing down the date and mileage of the last change solves that.

How Wearline handles it

Wearline adds "Cabin air filter" with a 10,000 km / 6-month interval. If you drive little, change it to 12 months; the wear bar shows whichever runs out first. When you swap it, tap "I replaced it today" on the item. Intervals are general guidance — follow your owner's manual.

Is the cabin air filter the same as the engine air filter?

No. The cabin filter cleans the air that comes into the car through the vents; the engine air filter cleans the air the engine breathes. They have separate intervals.

Can I replace the cabin filter myself?

On many cars it sits behind the glovebox and takes a few minutes without tools. Your owner's manual shows where it is.

Does an activated-carbon filter last longer?

Not necessarily longer, but it also reduces odors. Change it on the same schedule or sooner if smells come back.