How to Solve the Body Vibration of BMW 5 Series at 120 km/h?
2 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.
