Since the 4s uses the most common materials to charge the most expensive prices, the first insurance company will solve maintenance problems in the repair shop he knows. Later, it was found online that many consumables were actually very cheap, so I had the idea of doing maintenance by myself. Buy tools and materials and start the process.
MAN and MAHLE should be regarded as the better brands among filter materials, and the price is better. This time, we use a MAN set for maintenance.
The air conditioning filter element has nothing to do with the engine and the air here is very good (a small county town under Changbai Mountains), so I bought one for 9.9, and the result was quite a surprise.
It is a thick layer of activated carbon and the workmanship is very good. The price of 9.9 is really a good deal.
Open the glove box and remove the air conditioning filter element
Air conditioning filter element fixing plate
Remove it and you can take out the filter element directly
This is a filter element that was replaced in the repair shop before. It is of poor quality and a thin layer.
Wipe the dust inside
Insert filter element in direction
easily be recovered
Start removing the air filter. You can remove it in this hose tutorial, but mine is too tight to remove it. I have no choice but to replace it like this.
Clamp pliers are very important. This clamp is very tight. Ordinary pliers may require a lot of effort to separate them
The lower half of the empty filter box has been inserted
The picture below shows the filter element placed in the repair shop, and the picture above shows the MAN brand filter element. The quality can be seen at a glance
Air filter elements are very important. Most of the oil sludge in the engine is air filter with low filtration efficiency. Some dust enters the cylinder block and adheres to the oil, causing oil sludge and carbon deposition. Try not to save this money to avoid problems. Unfortunately, many people pay less attention to it than air filter, and some people even use it for several years.
The lower air filter box is quite clean. Although the air filter provided by the repair shop is of poor quality, it still has a certain filtering effect.
MAN Air Filter and Lower Box Combination
There is a lot of dust at the air inlet, wipe it
The air filter element has been installed. It has been a car for 3 years. The engine cabin will be cleaned every time the car is brushed. It is quite clean, right?
Everything went well, and I felt quite a sense of accomplishment after finishing it. In two days, I was going to find a place to change the oil and filter. Heijia 0w-40 and Man brand filter are already in place. In fact, it’s not that I can’t afford the money to go to the repair shop for maintenance. I just think that raising a car is an attitude. If you treat him well, he won’t easily throw it on the road.
MarjorieHearst 
11 
April 1, 2024 
