If your car feels wobbly at high speeds, there are a few potential causes. One possibility is that your tires are not inflated to the proper level. This can cause them to lose traction and grip on the road, making your car feel less stable. Another possibility is that your suspension needs to be serviced or replaced. Over time, shocks and struts can wear down, which can affect how your car handles on the road. If you suspect that either of these issues may be causing your car to feel wobbly at high speeds, it's best to have it checked out by a mechanic as soon as possible.