Front lower swing arm introduce

The function of the front wheel lower control arm is to support the vehicle body, fix and support the wheels. The front wheel lower control arm is usually made of steel material, and the use of this material's control arm is due to its high strength, elongation, excellent formability and flanging performance, good rust prevention performance, and effective buffering of vibration generated during car driving. The function of the car lower control arm is to cushion vibration during car driving, Among them, the shock absorber is used to cooperate with the swing arm and play a buffering role. 2. Material: The swing arm has a variety of materials, including aluminum alloy, cast iron, double-layer stamped parts, single-layer stamped parts, all of which have advantages and disadvantages. Stamped parts have better toughness, but their strength is not enough, and they are easy to break under impact. 3. Rust prevention: You can usually check whether the swing arm is rusted by yourself. The position of the swing arm is located in the component connecting the front tire and the center of the car, which is easy to check, If rust is found, it is necessary to promptly go to the 4S store for treatment to prevent accidents caused by breakage)

Steps to replace the car's lower control arm:

The steps to replace the car's lower swing arm: 1. Remove the screw of the welding part between the swing arm and the front axle. This screw can be removed together with a No. 18 socket and wrench, without any obstruction around it, making it easy to disassemble. Remove the fixing screw of the support rod, where there are two screws connected to the lower swing arm, just remove these two screws; 2. Remove the fixing screw of the steering knuckle. This screw is slightly harder than the first two. You can use a No. 16 wrench to match the No. 16 socket to remove the screw and screw. Remove the swing arm. After removing all screws, you can use a hammer to knock down the swing arm. Pay attention to safety when knocking on the door; 3. Install a new connecting screw between the rocker arm and the steering knuckle. The installation process is relatively simple, just reverse the disassembly process and tighten the screw according to the specified torque. When installing the screw, tap the rocker arm upwards until the fixing bolt can pass through smoothly. Install the support rod fixing screw. After connecting the rocker arm to the support rod, tighten the two screws. 4. Install the fixing screws of the welded parts. As long as the holes are aligned, the bolt can pass through smoothly, Tighten the nut installation. In summary, it is best to perform four-wheel alignment on the vehicle after replacing the swing arm to prevent it from going in the wrong direction

BMW X3 introduce

The BMW X3 intelligent all wheel drive system can flexibly and quickly distribute driving force between various axles according to specific road conditions. BMW has also created the concept of a sports and leisure vehicle for new models. You can occasionally drive it to the countryside for some less intense outdoor driving, but most of the time it will patrol the city. So, Components such as non load bearing bodies, solid axles, and non independent suspensions seem to have become relics of the original off-road vehicle. Conservatives believe this is a major deviation, while most customers believe it is a correct response to market demand and should be pleasing, At least it still retains the most desirable advantages of off-road vehicles: a sturdy and sturdy body, spacious indoor space, high seat position, and broad driving vision. The various control components are clear and accurate. The driving control is very agile, with sporty driving performance, very accurate steering, and clear road feel. Driving on multi bend roads can bring more fun to the driver, making you full of confidence. The classic inline 6-cylinder engine runs smoothly and has abundant power, Showcasing BMW's distinctive features