How to Solve the Body Vibration of BMW 5 Series at 120 km/h?
3 Answers
First, check the throttle. A dirty or faulty throttle can cause vibration, and cleaning the throttle should solve the problem. When the car goes through water, a small amount of water may enter the high-voltage wires, causing poor ignition. Use an air compressor to remove and dry the high-voltage wires, or bake them dry. Check the spark plugs. If the ceramic part of the spark plug is cracked, also inspect whether the ignition module is functioning properly. A damp air filter can lead to unstable engine power. Try drying the air filter, or better yet, replace it with a new one.
I'm an experienced driver who has been driving a BMW 5 Series for over a decade, and I often encounter body vibrations at highway speeds of 120 km/h. I remember one time when the shaking was so severe that the steering wheel was wobbling, and I immediately slowed down and pulled over to check. The issue is usually caused by unbalanced tires—at high speeds, the centrifugal force is greater, amplifying even minor imbalances. It could also be due to deformed rims or uneven brake discs, which become more noticeable during hard braking. My solution is to first check the tire wear and air pressure for uniformity, which is simple and cost-effective. If that doesn't work, I take it to a tire shop for a dynamic balance test. If the tires are fine, I then inspect the rims or brake discs. Loose suspension components can also be a cause, though this is relatively rare. My advice is not to delay—if the vibration gets worse, pull over and inspect to avoid long-term damage to the chassis from sustained shaking. For prevention, have technicians check tire balance during regular maintenance to ensure smoother high-speed driving.
I'm someone who loves to delve into car issues, and the BMW 5 Series shaking at 120 km/h is a common trouble spot. It could be due to wheel imbalance, where vibrations spread throughout the body at high speeds; or it might be caused by worn or deformed wheel hub bearings leading to imbalance. If the brake discs are uneven, braking can exacerbate the shaking. Suspension system issues, such as problems with ball joints or control arms, could also be the culprit, but professional diagnostic tools are needed for that. I recommend starting with a simple balance test at a repair shop—it only costs a few dozen bucks. If that doesn’t solve it, check the condition of the wheel hubs and the thickness of the brake discs. Rear-wheel-drive cars are sensitive to alignment, so you might as well get a four-wheel alignment done while you're at it. The whole process should be quick, but if the shaking is too severe, slow down and drive cautiously—safety first. Also, try to avoid potholes in daily driving to reduce the risk of wheel hub damage.
