Body damage. Such as rust, depression, deformation, desoldering, cracking, etc. Rust is caused by chemical reactions caused by moisture and other pollutants in the air after the paint film is damaged. The depression, deformation, detachment, and rupture of the vehicle body are caused by mechanical damage.

发动机不能启动或启动困难。出现这种情况多数都与主喷油器、冷起动喷油器、温控开关、ECU和控制电路工作不良，蓄电池亏电，点火器或脉冲发生器损坏等因素有关。

The engine cannot start or is difficult to start. This situation is mostly related to factors such as poor operation of the main fuel injector, cold start fuel injector, temperature control switch, ECU and control circuit, battery depletion, and damage to the igniter or pulse generator.

离合器打滑。在离合器踏板完全放松时，汽车起步或重载上坡乏力，汽车加速时车速不能随之提高，严重时离合器处出现冒烟和烧焦味。其实质是摩擦力不足，主要由于离合器压紧力降低或摩擦系数降低所致。

The clutch is slipping. When the clutch pedal is completely relaxed, the car may start or experience fatigue when overloaded uphill, and the speed cannot increase with acceleration. In severe cases, smoke and a burnt smell may appear at the clutch. Its essence is insufficient friction, mainly due to a decrease in clutch clamping force or a decrease in friction coefficient.

手动变速器跳档。跳档多发生在中、高速负荷突变或车辆颠簸时。主要是运动件过度磨损或变形失效，造成啮合不正确，自锁失控，档位不能固定，发生跳档。

Manual transmission jumps gears. Jumping gears often occurs when there is a sudden change in load at medium or high speeds, or when the vehicle is bumpy. Mainly due to excessive wear or deformation failure of moving parts, resulting in incorrect meshing, self-locking loss of control, inability to fix gear, and gear skipping.

行驶中使用制动，汽车不能减速或停车。原因可能是制动管路漏油或，漏气，管路接头破裂或脱落，制动密封元件失效等。

When using brakes while driving, the car cannot slow down or stop. The reason may be oil or gas leakage in the brake pipeline, rupture or detachment of pipeline joints, failure of brake sealing components, etc.

轮胎异常磨损。可能是由于气压不足或过高，前束或车轮外倾角过大或过小，车轮不平衡，轮胎长期未换位或球头销过度磨损，使用驾驶不当等方面导致。

Abnormal tire wear. It may be caused by insufficient or excessive air pressure, excessive or insufficient toe or wheel camber, unbalanced wheels, long-term lack of tire rotation or excessive wear of ball joint pins, improper use and driving, etc.