Engine vibration cheorlet optra 2004

There are a couple of things that can cause vibration ie wheel balancing that might be wrong usually vibrates when driving at 100-120 km/hr,ball joints that a worn,wheel hubs bend,steering knuckle excessive play,steering rack excessive play,worn steering UJ,worn steering column....

Sounds like you need to get your tyres balanced. If the vibration is when you don't touch the brakes only between the 80-100.
If its when you touch the brake pedal and the vibration occures, your disc brakes are warped, either machining or replacement.

tires out of balance or showing threads

Balance your tires,maby the problem.

hi about every 60,000 miles is usual..hope this helps

you have 1 or 2 bad ignition coils very common on this engine

check wheel bearings , loose ball joints steering idler arm...

get your tires checked and maybe it could be in your front axles

Are the tires balanced? Did they use stick on weights, if so? If this holds true, see if there is a mark on the wheel, where a weight has flown off.

How about the front end alignment, and condition of the tires. Sometimes a belt slips in the tire. This is hard to see, but can be found by sliding your hand around the tire, and you will feel a bulge to one side. (Use caution, as there's no telling what may be stuck in your tire/s, and you can damage your hand or fingers. I realize how that sounds. One has to use finesse, when checking one's tires, with this method)

HAVE THE TIRES BALANCED AND CHECKED FOR SEPARATION