Why is my car shaking or vibrating?
Short answer:Vibration only at highway speed usually means tire balance or a bent wheel. Vibration under braking usually means warped rotors. At idle, often a misfire or motor mount — Labor Only Auto Repair can isolate which.
Speed-dependent vibration that appears above ~45 mph and gets worse toward 65-70 mph is almost always a tire balance issue, a bent wheel, a separated tire belt, or a driveshaft/axle problem. A road-force balance or wheel inspection sorts most of it out.
Vibration you feel through the brake pedal or steering wheel only when braking is usually rotor thickness variation (commonly called 'warped rotors'). Rotors can often be resurfaced if they're above minimum spec; otherwise they get replaced with the pads.
Shaking at idle or under acceleration with the vehicle stationary is usually a misfire (bad plug, coil, or injector) or a broken/collapsed motor mount. We'll pull codes, do a cylinder balance test, and inspect mounts to isolate which.
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