Suspension and Chassis I30N knocking sound from rear of the car

[Robski]

Hello,

A few weeks ago my 1 year old i30n DCT got a knocking sound from the rear, speedbumps, going left to right fast, bad road you can hear it it gets less when ist warm outside or the car heats up when its under 0 outside its bad. Did check under the car and the trunk nothing seems off.

 

[Huihai]

I have this exact problem. Bad at below zero temps, but summertime nothing. Pretty sure it´s rear shocks. Check if it has any leaks at the shocks.

 

[Robski]

I think next week i put it on the lift to check anti roll bar bolts, if its not that it goes to the dealer for warrenty.

 

[aarepuur]

I have 2018 I30N. 50000+KM. Rear shocks replaced 2 times so far. And knocking again. This is a typical problem

 

[i30nSportBack]

I have 2018 I30N. 50000+KM. Rear shocks replaced 2 times so far. And knocking again. This is a typical problem

Did the noise go after changing shocks

 

[aarepuur]

Month ago replaced the schocks again. Approx 58000km. It is set 5 quess. This time changed the fastening rubber parts as well. Much quieter, but not quiet. It seems that Hyundai has something wrong in the construction of the rear schocks. I ma seriously thinking of giving up the adjustable suspenion in order to get rid of the "knocking" noise

 

[mesai30n]

Other noise source is the rear folding seat locking mechanism, being slightly loose when chasis flexes against seats.

Ive had that problem, ive used electrical tape which reduces the noise a lot.