How to replace the battery of a BMW key? How to identify the model of a BMW by its appearance?

BMW is a world-famous luxury car brand. Many friends don’t know how to replace the battery of a BMW car key. Before replacing it, it is best to first understand the model of your car key battery. The following is a detailed introduction on how to replace the BMW key battery and how to identify the BMW series from the appearance.

Contents of this article

1. How to replace the BMW key battery

2. How to identify the series of a BMW from its appearance

3. How often should BMW brake pads be replaced?

How to replace the BMW key battery

It is best to first understand the model of your car key battery, which is usually written in the vehicle owner's manual, and then choose a new key battery according to the specified model.

1. Pull out the spare key behind the key.

2. Gently pry open the back cover with your hands or a spare key.

3. Prepare a sharp object and gently pick out the battery.

4. Prepare a new battery and wipe the surface of the battery with a clean paper towel.

5. Use a tissue to push the battery back to its original position, close the back cover, and replace the spare key.

How to tell which series a BMW is from its appearance

1. 1 Series, hatchback, the smallest, the biggest difference is that the butt is not raised, straight down, that is, there is no trunk. It is rare in China.

2. The 3 Series looks smaller and is very similar to the 5 Series, but not as big or long. Compared to the 5 Series, the 3 Series looks more sporty.

3.5 Series is similar to the 3 Series, except that it looks larger. Once you understand this, you can basically distinguish between the 3 Series and the 5 Series.

4. 6 Series, looks elegant, sports car, body similar to 5 Series, usually two-door four-seater, also convertible. The most elegant BMW two-door sports car you see is 6 Series, the difference between 6 Series and other sports cars is that it does not have such exaggerated aerodynamic kit.

The 5 and 7 series, needless to say, are the largest and widest, and the front side looks like a big open mouth. In short, they look luxurious.

6. X series, the SUV bodies from small to large are X1, X3, X5, and X6. They have a coupe feel and look very sporty.

7. M series, M3 is the most common. It has the shadow of 3 series, but it is more sporty than 3 series at a glance. It sounds like a sports car. Congratulations, you are looking at M3. Note that M3 has two doors and four doors. M5 four-door coupe, also has the shadow of 5 series, the identification method is the same as M5, it is rare. M6 two-door four-seater. The identification method is the same as above. Pay attention to the door. The new X5M and X6M added to the M series have the same identification method.

8. Z4, a two-door, two-seater sports car with a small body and a long front hood.

How often should BMW brake pads be replaced?

This has to do with personal driving habits, brake pad material and road conditions. Generally, it can run 50,000 to 60,000 kilometers.

Car brake pads, also called car brake leathers, refer to the friction materials fixed on the brake drum or brake disc that rotates with the wheel. The friction lining and friction pads are subjected to external pressure, generating friction to achieve the purpose of decelerating the vehicle.

Automobile brake pads are generally composed of steel plates, adhesive insulation layers and friction blocks. The steel plates must be painted to prevent rust. During the painting process, the SMT-4 furnace temperature tracker is used to detect the temperature distribution of the painting process to ensure quality.

The heat insulation layer is made of non-heat-conducting materials for the purpose of heat insulation. The friction block is made of friction material and adhesive. When braking, it is squeezed on the brake disc or brake drum to produce friction, thereby achieving the purpose of deceleration and braking of the vehicle. Due to friction, the friction block will gradually wear out. Generally speaking, the lower the cost of the brake pad, the faster it wears. After the friction material is used up, the brake pad should be replaced in time, otherwise the steel plate will come into direct contact with the brake disc, which will eventually lose the braking effect and damage the brake disc.