The most common fault with the Hyundai I30 is a knock and clunking noise that develops int he steering wheel. The cause for this is a Little plastic gear that fails. Be careful of any one trying to sell you a complete column. Having said that the second most common fault is the failure of the electric motor for the column which will require the replacement column.
We have covered the replacement of the column here.
We have also covered the failure of the plastic gear here.
In the video below we show you how to replace the plastic gear.