Air Quality Sensor
An air quality sensor detects pollutants or particles in outside air so the climate system can switch to recirculation.
What is Air Quality Sensor?
Some sensors detect gases such as nitrogen oxides from traffic. Others measure fine particles and display a PM2.5 value. It works best together with a good cabin filter. Some cars show pollen or particle levels inside and outside the car on the screen.
How it works
When pollution rises, the system closes the fresh-air flap and recirculates cabin air.
Why it matters for your car
Long periods of recirculation can raise CO₂ and fog the windows. Replace the cabin filter on schedule.
Other terms
- ABS Reluctor Ring (Tone Ring)
- Adaptive Dampers (Adaptive Shock Absorbers)
- Build Date (Production Date)
- Cooling System Bleeding
- Double-Declutching
- Drum Brake
- Electric Brake Booster (Electromechanical Booster)
- Engine Hoist (Engine Crane)
- Front Splitter
- Headlight Aiming
- Mild Hybrid (MHEV, 48-volt Hybrid)
- Number Plate (Licence Plate)
- Remanufactured Parts
- Thrust Angle
- TPMS (Tyre Pressure Monitoring System)
- Tyre Flat Spot
- Warning Triangle
- Water-Methanol Injection
- Windscreen (Windshield)
- WLTP (Worldwide Harmonised Light Vehicles Test Procedure)