1. Poor quality filter housing or bottom plate pressure resistance does not meet the standard, and the filter bottom plate protrudes within the required pressure

2. Damage to filter housing caused by improper installation or poor manufacturing of inferior filters

3. The user installed an incorrect model or had quality issues with the screw teeth, causing the screw teeth to not fit properly and the filter to be washed off.

4. Edge damage and air leakage caused by improper installation or poor manufacturing of inferior filters (including manufacturing defects and improper installation and use)

5. The filter does not have a bypass valve and has been used for a long time, or there are many impurities in the oil that have not been replaced according to the required time. After the filter paper is blocked, oil leakage occurs

6. External sealing ring rupture, aging, and permanent deformation caused by improper installation or poor manufacturing of inferior filters

7. When the temperature is low and the car is not heated before driving, the oil flow is poor, the pressure is high, or low-quality oil is used with a lot of gel, which blocks the filter paper. However, when the driver suddenly accelerates, the oil pressure exceeds the limit, damaging the filter or other parts and causing oil leakage

8. Blockages in car oil circuits cause excessive pressure and damage to filters