Would a bad cv joint make car have significant vibration when accelerating and clunking noise under driver seat?

Yes, a bad CV joint can cause these symptoms. CV joints are responsible for transmitting power from the transmission to the wheels, and when they are damaged, they can cause a variety of problems, including vibrations, clunking noises, and even loss of power.

CV joint damage is most often caused by wear and tear, but can also be caused by accidents or other damage. If you are experiencing any of the symptoms mentioned above, it is important to have your car inspected by a qualified mechanic as soon as possible to avoid further damage.