What is the common fault of Lao Liu's mother?

The common faults of Lao Liu's mother are as follows: 1. Throttle: The throttle of the old mazda 6 is easy to get dirty. Compared with other models, the throttle of second-hand mazda 6 needs more cleaning. 2. Oil leakage of valve seat cushion: The old mazda 6 has the common problem of oil leakage of valve seat cushion, but this is not a case. Many cars will have oil leakage from the valve seat cushion. 3. Oil leakage from high-pressure tubing: mazda 6's steering high-pressure tubing is prone to oil leakage, and mazda 6's steering high-pressure tubing has been complained by users. 4. Shock absorber oil leakage: mazda 6 should be alert to shock absorber oil leakage.