Question about Hyundai Motor 2003 Sonata

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Knocking on pedal when braking

Hyundai trajet 03 plate 2l deisel, when I brake the brake petal knock brakes fine could it be warp on disc happens more often had pads do 1000 miles ago but getting worse

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  • Eric kaiser May 11, 2010

    you are correct the most likely cause is the rotors are warpped and should be replaced where the rotors machined when the pads were replaced?


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I have same prob but mines diesel 02 .
it's the abs rings get them for about £17 hyundai say they dont do them you have to get complete unit drive shafts comes as 1 ,approx £350
i thought mine was the disc's but very rare, abs rings 100%

Posted on Feb 03, 2010

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Brake lights do not work till brake petal is all the way down

Sounds like the switch is faulty or has been knocked out of place. Check at the pedal itself, get down and look for the switch, it will be the push type. When you press the pedal down you will see a switch being released, this is the thing controlling the brake lights. Hope this is helpful.

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Whenever I brake there is a knocking noise that gets progressively slower as the car comes to a stop. This does not happen in reverse.

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Aug 15, 2008 | Chevrolet Camaro Cars & Trucks

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It sounds like the rotor (brake disk) is warped. That would cause the pads to wear much more quickly because the disk "wobbles".
The warped disk can also cause the noise, depending on how bad the warp is.
When most shops change pads, they usually recommend that you "turn" the rotors, it is a way of truing the disk.

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you need to go to an engineer and tell him your brakes are making that sound

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