What could cause front end wheel shake while braking?

I had that same problem on my Toyota pickup once and replace the wheel. No more problem. Wheel must have had a certain warp to it. Normally though, this wobble you feel would be a burnt spot in a rotor. But you've replaced that.

Could be caused by a sticking/failing CV joint. If you check boots and see cracks or tears most likely the Joint then got debris which could lead to failure.
Confirm that it FEELS like brakes are active but your NOT applying brakes. If this is the case then my thought on CV joint would be first check. I had one fail a few years ago and it was similar. Vibration started and then I could feel the vehicle slowing.

If you ARE applying brakes and you fee the shudder or vibration then it may be related to a tie rod end. A worn tie rod allows the wheel to go off track slightly and the result we feel when driving is a shudder or vibration.

Hope this helps guide to a solution.

When you get a vibration at high speeds when you hit the brakes the rotor/s are very slightly warped. Depending on miles, you may be able to get them turned / surfaced. One other thing is if you don't drive it to much, they can rust and cause the same problem. Hitting the brakes a few times on the highway will smooth them out.

will try to help. when front wheels shake while applying brakes and you can feel shake in steering wheel, front brakes and rotors need replacement.rotors are warped,if you replace front brake pads, it will return[shaking when you apply brakes] suggest that you replace front rotors[both] replace [both]front brake pads. cost? i would charge [brake pads cost $55.00] labor,$60.00] total $115.00 thank you for choosing fixya.com

Most likely a tire that has a broken bet,or there is a front end part that is bad.

Apply the emergency brake slightly while driving to see if the rear brakes are the issue. Other wise the rotors are warped or there is debris behind the rotor to hub surface

It sounds like you may have more than one problem here. First I would investigate Front End Alignment and ALL Steering/Suspension components for excessive wear and/or looseness. Second I would Inspect the Brake Rotors and Pads for uneven wear. Third I would check the Tires for uneven wear and balance. Many things can cause these symptoms: Worn out Ball Joints, defective Shock Absorbers/Struts. Worn out Tie Rod Ends, Idler Arm, even the Steering Gear Box can be part of the problem. Brake Rotors and Tires can be out of Balance with either one causing the problem over 60 MPH. I strongly suggest having your vehicle inspected by an ASE Certified Front End and Brake specialist immediately. It is very dangerous to drive a vehicle with these symptoms.

Make sure the wheels are properly balanced and secure. Check all steering components and bushings for excessive play. Make sure steering box is secure on frame. If everything is tight, you can have alignment moved slightly more positive (caster only) and that too should help.
Wheel bearing hubs can also cause shake in certain cases and a binding brake caliper can as well (one wheel will be really hot after driving when compared with others) If shake is in body and not front end (you did not say) check driveshaft joints for play.

um not sure what you mean by wheel wobbles slightly. can you only feel it when you brake or is it just more when you brake? if you feel it all the time and just more when you brake then i would have you tire balanced. if you just feel a shaking when you brake then you need to have your rotors looked at front and back because either will cause shaking in the front end.

Have the brake discs checked, as they may need to be machined or replaced.Also have them check the idler arm and tie rod ends.