Why is my car clunking over bumps? Many times, when vehicles make a clunking noise over bumps it is caused by the car’s struts. The struts are what provides the support for the vehicle’s suspension. It is what helps with ride comfort and keeps the vehicle driving smoothly. The strut will compress to take the impact of a bump. Struts should be replaced for maintenance every 75,000 miles. A technician will inspect a strut to check for wear, rust, or leaks. These indicate that it is time to have the strut replaced. Call today to schedule an appointment to have your suspension checked!