车是用来开的，因此再好的车也要时时注意保养，下面这些地方，日常使用时要尤其注意。
济南宝马汽车专修人员给您内容：
The car is for driving, so no matter how good the car is, you should always pay attention to maintenance. Pay special attention to the following places during daily use. Jinan BMW auto repair personnel recommend to you:
轮胎汽车轮胎是有“年龄”的，即使一条崭新的轮胎，存放时间超过四年也会老化，因为轮胎的主要材料是橡胶，而橡胶的特性就是长时间使用或者放置就会老化，如果使用老化的轮胎轻则影响车辆的性能，重则发生爆胎事故危及生命。
Tyres automobile tyres have "age". Even if a brand-new tyre is stored for more than four years, it will age, because the main material of the tyre is rubber, and the characteristic of the rubber is that it will age after long-term use or storage. If the aged tyre is used, it will affect the performance of the vehicle at least, and it will be life-threatening if it is used.
辨别轮胎的生产日期很简单，在轮胎靠近轮毂的地方可以找到一串4位的数字，前两位表示生产周，后两位表示生产年份。如果车主要更换轮胎，在挑选的时候一定要看清楚生产的日期。
It is easy to identify the production date of the tire. A series of 4-digit numbers can be found near the wheel hub. The first two digits represent the production week and the last two digits represent the production year. If the car mainly changes tires, be sure to look at the production date when selecting it.
此外，车主们在升级轮胎时，千万不能盲目，否则会造成隐患。在确定轮胎规格之后，要选择同种花纹的轮胎，以确保升级后的行车使用。
In addition, car owners must not blindly upgrade tires, otherwise it will cause potential safety hazards. After determining the tire specification, choose the tire with the same pattern to ensure the safe use of the upgraded driving.
如果轮胎的磨耗程度、结构及规格不一致，不仅影响轮胎的使用寿命，更重要的是会造成汽车的刹车阻力不一致，汽车高速行驶需要急刹车时，轮胎的阻力不同使四轮的受力不均，易造成车辆失控导致的交通事故。需要注意的是，升级轮胎时，好是四条轮胎同时更换。
If the wear degree, structure and specification of the tire are inconsistent, it will not only affect the service life of the tire, but also lead to inconsistent braking resistance of the car. When the car needs sudden braking at high speed, the different resistance of the tire will cause uneven stress on the four wheels, which is easy to cause traffic accidents caused by vehicle loss of control. It should be noted that when upgrading tires, it is better to replace four tires at the same time.
如果不能同时更换，少要保持左右两条轮胎是一致，这样就能避免急刹车时因左右两边轮胎摩擦力不同而导致的侧滑。
If it cannot be replaced at the same time, at least keep the left and right tires consistent, so as to avoid side slip caused by different friction between the left and right tires during sudden braking.
发动机现在很多车子使用低能耗高功率的涡轮增压技术。对于这类发动机，有一些需要特别注意的地方。勿着车就走。
Many cars now use low-energy and high-power turbocharging technology. For this kind of engine, there are some places that need special attention. Don't leave in the car.
发动机发动后，特别是在冬季，应让其怠速运转一段时间，以便在增压器转子高速运转之前让润滑油充分润滑轴承。其次，勿立即熄火。
After the engine is started, especially in winter, it should be idled for a period of time, so that the lubricating oil can fully lubricate the bearings before the supercharger rotor runs at high speed. Secondly, do not shut down the engine immediately.
发动机长时间高速运转后，应怠速运转3-5分钟再熄火。发动机工作时，有一部分机油供给涡轮增压器转子轴承润滑和用于冷却。
After the engine runs at high speed for a long time, it should idle for 3-5 minutes and then shut down. When the engine is working, some oil is supplied to the turbocharger rotor bearing for lubrication and cooling.
正在运行的发动机突然停机后，机油压力迅速下降为零，增压器涡轮部分的高温传到中间，轴承支撑壳内的热量不能迅速带走，而同时增压器转子仍在惯性作用下高速旋转，因此，发动机热机状态下如果突然停机，会引起涡轮增压器内滞留的机油过热而损坏轴承和轴。特别要防止猛轰几脚油门后突然熄火。
After the running engine is suddenly shut down, the oil pressure rapidly drops to zero, the high temperature of the turbocharger turbine part is transmitted to the middle, and the heat in the bearing support shell cannot be taken away quickly. At the same time, the turbocharger rotor is still rotating at high speed under the action of inertia. Therefore, if the engine is suddenly shut down under the hot engine state, the oil trapped in the turbocharger will overheat and damage the bearings and shafts. In particular, it is necessary to prevent sudden flameout after slamming a few accelerator feet.
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