Hello, please help.

When driving above 100 km/h and trying to brake, very large vibrations are transferred to the steering wheel, the steering wheel starts to move left and right, vibrating heavily. By releasing the braking, the problem disappears. The same vibrations will appear when I hit an unevenness in the road. I will add that the discs, pads, rim and tires are new. Any of you had something similar? Where to look for the cause?

Thank you in advance for all your tips.

 

Assuming you've had the wheels properly balanced and have bedded the pads in, how old is the car? Could it be wear in the suspension?

 

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F-type from 2016, over 65,000 miles, it may be the suspension's fault. If suspended, which element should I start checking from?

 

Sounds to me like the classic Pad Retransfer...that is, when you come to a stop after hard braking (as, the end of a freeway ramp or a traffic light at the bottom of a hill) the hot rotors attract some pad material to the rotors in one spot, THEN the vibrations begin.

A brake shop could get that off your rotors without removing any significant rotor thickness.

In the future, just stop a car-length earlier and creep forward slowly.

HTH

 

If it is occurring when you hit a bump as well, then it's likely not brake related. As to what part in the suspension it might be? That's going to be really hard to diagnose without visual inspecting things and probably getting the car on a lift. Any of the front bushings could be the culprit. Tie rods. Even the struts could cause it. Regardless, get it looked at as soon as you can. It will get worse and worse and can cause secondary damage. It's also a safety issue.

 

This is very common in XJ (x351)
It is caused by front lower arm (banana arm) inner bush what get soft in use. When braking (or high suspension move) this bush flex causing tyres position moving backwards. By angle move of tie rods the toe-in setting change and tyres start "fish-tailing" heavily. (generating much more force on vibration than warped disks)
Just change the Banana arms and you are good. 4-Wheel aligment is needed after.
Not sure if AWD and RWD have same part? Nor no info of i4, V6, V8.
On XJ platform its all same part made by Lemförder. (available reasonable price from aftermarket part shops, so no worth to use anything else on XJ)
I just pick up one eBay offering randomly for F--Type, so you see what i mean. (not sure if this is suitable for your car, since no info what model you have)
Here: Link of eBay

 

Thank you for the tip. I have a 3.0 380 HP engine, AWD, I have to go to the diagnostician and check this clue.

 

I certainly have a lot to learn concerning assessing potential suspension issues, but based on what you are describing it does seem like it would most likely be suspension related.