Vibration under braking and slight when driving

[DaveR]

Hi guys I hop some one can help

I have a qashqai J10 1.5 DCI when I'm driving and brake I have a vibration through the steering wheel. When I am driving I can slightly feel something but it's worse when braking I think from drivers side. I jacked it up and found track rod end had slight play so changed it . But although steering seems tighter I still have this vibration coming through it only sounds slight to you ear but is noticeable thought the steering wheel . Any ideas!? Could it be the top coil in mount. I'm at a loss as it doesn't seem obvious as when I go up and down and side to side on wheel nothing. Brakes were changed 3 months ago by the dealership ingot it from but I wondered if they are cheap could this be the cause .... Any help or guidance I would appreciate thanks!!

[andy2019]

Warped brake discs ?

[DaveR]

Thought that it's just they were new. Also it doesn't happen every time most times and hard braking

[andy2019]

Did it do it before you had the new discs fitted

[DaveR]

It was the dealer so it was ok when I got the car but this has now developed

[andy2019]

so if the dealer fitted them and you never had a problem before that i would take it back to the dealers and get them to look at them for you, hopefully they changed both pads and discs at the same time ? also get your tracking checked aswell.