
According to the maintenance manual of the Volkswagen Tiguan, the air filter should generally be replaced every 10,000 to 20,000 kilometers or every other maintenance interval. However, it is recommended to clean the air filter every 5,000 kilometers to reduce the formation of throttle sludge. The position of the car's air filter element is determined by the intake form and the structure of the engine, usually located in the air filter on the engine intake pipe. There are two types of air filters in cars: dry and wet. The dry type is made of paper or organic materials, while the wet type is made of metal wire mesh. The function of the air filter is to filter out particulate impurities in the air, ensuring that sufficient clean air enters the cylinder and preventing floating dust in the air from being sucked into the engine, which accelerates the wear of the piston group and the cylinder. Air filter: It is a type of filter, also known as an air filter cartridge, air cleaner, or style. It is mainly used in engineering vehicles, cars, agricultural vehicles, laboratories, sterile operating rooms, and various precision operating rooms as an air filter. During operation, the engine inhales a large amount of air. If the air is not filtered, the suspended dust in the air will be sucked into the cylinder, accelerating the wear of the piston group and the cylinder. Larger particles entering between the piston and the cylinder can cause severe cylinder scoring, which is particularly serious in dry and sandy working environments. The air cleaner is installed in front of the carburetor or intake pipe to filter out dust and sand particles in the air, ensuring that sufficient and clean air enters the cylinder. Using a dirty air filter while driving can cause insufficient engine intake, incomplete fuel combustion, leading to unstable engine operation, reduced power, and increased fuel consumption. Therefore, the car must keep the air filter clean. The car air cleaner is a device that removes particulate impurities from the air, consisting of one or several air filter components. Its main function is to filter out harmful impurities in the air that will enter the cylinder to reduce early wear of the cylinder, piston, piston rings, valves, and valve seats. Therefore, before the air enters the cylinder, it must be finely filtered by the air cleaner. A dirty air filter can cause poor engine performance, excessive fuel consumption, and engine damage. When checking the air filter, if it is found to have little dust and is lightly clogged, it can be cleaned with high-pressure air from the inside out and continue to be used. A severely dirty air filter should be replaced in time.

Changing the air conditioning filter is something I find quite particular. As someone who frequently helps others with car inspections, the Touareg's AC system is well-designed, but the filter tends to accumulate dust. Generally, it should be replaced every 15,000 kilometers or once a year. If you often drive on dusty roads, like some construction site owners I've encountered, it's best to check it every six months. If left unchanged, the air inside the car won't circulate well, and it might even cause the blower to make noise. I've come across cars where the AC airflow was significantly reduced due to a clogged filter, but it improved immediately after cleaning. The key is to refer to the maintenance manual—for the Touareg, the filter is located behind the glove compartment. It's not difficult to replace it yourself; just remove it to check the color. If it's too dirty, replace it promptly to avoid turning it into a bigger issue that could affect your health.

I've been driving my Tiguan for two years now, and if you don't change the cabin air filter frequently enough, the smell inside the car can be really unbearable. I remember one summer when I was on a long drive, I kept sneezing whenever the air blew, and later found the filter completely blackened during inspection - I immediately replaced it myself. It's recommended to change it every 12,000 to 18,000 kilometers or every 12 months, whichever comes first. If you live in a suburban area with lots of wind and dust, you might need to do it even more frequently. Doing it yourself is quite simple - just buy the right filter model online, and it takes just a few minutes to replace by removing the glove compartment. After replacement, the air quality inside improves noticeably, and it prevents strange odors from the AC. The key is not to wait until the AC weakens before taking action - changing it early saves both money and hassle. I really regretted not doing it sooner that time.

Changing the air filter is mainly for health protection. When the cabin air filter gets clogged, the air quality inside the car deteriorates, which can be particularly troublesome for people with sensitive noses. My child has a history of allergies, so I check the filter condition every 10 months or so after driving my Tiguan. It's recommended to replace it at least once a year. If you drive daily in congested urban areas with high pollutant levels, inspecting it every six months is even safer. A dirty filter can also lead to bacterial buildup, and prolonged exposure may cause dizziness or headaches – these are no minor issues. Here's a handy tip: listen for unusual rustling sounds when turning on the AC; if present, there's an 80% chance the filter needs replacement. Timely maintenance ensures comfortable breathing inside the vehicle, preventing illnesses and saving on medication costs.


