Why Does the Car Make Abnormal Noises When the Speed Exceeds 120?
4 Answers
Check whether the front wheel alignment angles and toe-in meet the requirements. Here are some relevant introductions about vehicle driving: 1. Precautions: Strictly prevent speeding. Normally, when the speed reaches 72 kilometers per hour, the vision of a driver with normal eyesight of 5.1 will drop to 4.8, significantly reducing the driver's ability to discern the surrounding environment and pedestrians. Speeding disrupts the vehicle's performance indices under specific conditions, increases the vehicle's working intensity and load, and accelerates the wear and damage of mechanical parts. 2. Skills: To cope with the rapidly changing traffic conditions on the road, it is necessary to make quick judgments within 0.75 seconds and take appropriate technical measures to ensure traffic safety. When driving without alcohol consumption, the reaction time from visual perception to stepping on the brake pedal upon detecting a dangerous situation ahead is 0.75 seconds.
I've been driving for many years in my life and have seen quite a few cases where noise starts to appear once the speed hits 120. A common cause is uneven tires—excessive wear or significant pressure differences can lead to intensified vibrations at high speeds, resulting in noise. It could also be aging wheel axles or bearings that start to produce friction sounds when speeding up. I've even encountered exhaust system leaks that cause constant whooshing noises. The key point is that such noises indicate loose or fatigued parts. If not checked in time, losing control at high speeds can be dangerous. I've done a few DIY inspections myself—first checking tire pressure, examining wheel balance, and if necessary, taking it to a professional shop for an undercarriage scan. 120 is usually the critical point because wind resistance increases and vibration frequencies change. Don't wait until an accident happens to take action; road safety relies on careful maintenance.
After working on many car repairs, I believe the main causes of noise at 120 km/h include bearing wear or axle issues—friction amplifies the sound at high speeds, like a grinding or rumbling noise. It could also be loose brake pads or a cracked exhaust pipe joint, causing noticeable whistling when airflow hits it. Additionally, out-of-round tires or irregular tire pressure can lead to vibration and noise. I recommend immediately slowing down and pulling over to check for any wobbling sensation when the wheels rotate. A simple method is to shake the tire sidewall by hand to test for looseness. Continuing to drive could worsen component fatigue, leading to higher costs. It's best to quickly schedule a mechanic to use diagnostic tools for precise testing—maintaining your car's condition is truly cost-effective.
Just got the new car not long ago, last week at 120 km/h on the highway, suddenly heard a loud buzzing noise that scared me! After checking some information, I realized it's most likely due to tire issues—uneven tread wear or significant tire pressure deviation, causing noticeable resonance at certain speeds. Or it could be aging suspension bushings, making creaking sounds when moving. What's more concerning is potential drivetrain failure, which could easily affect handling stability. I plan to take it to the 4S shop for a comprehensive inspection, because unusual noises are usually warning signals, and ignoring them poses higher risks during nighttime highway driving. Safe driving starts with addressing small issues early, saving money on major repairs later.
