FAQ: Vibration under braking: warped rotors? NO!

[WRXtoStingerGT]

Thanks!

For sure!!

Good luck!!

 

[Navidk]

I think I joined the shuddering club too!. Only have 20K and it’s very disappointing. I’m getting cquence rotors with EBC red. Hopefully it’s a good combo.

 

[WRXtoStingerGT]

I think I joined the shuddering club too!. Only have 20K and it’s very disappointing. I’m getting cquence rotors with EBC red. Hopefully it’s a good combo.

In before someone says it's your driving and not the bad/cheap parts from Kia to the N. American market!

lmfao!! jk!!

 

[NIU_Huskies]

My mechanic charged me $275 to install all 4 pads, which I thought was a little high (maybe trying to recoup lost $ post-pandemic?), I'd read that the pad swap is crazy easy. Pads were $230, so for about $500 problem is solved, hopefully.

The pads are super easy to replace. I replaced mine myself just over a month ago with R1 Concepts Optimum OEp front and rear pads.

 

[WRXtoStingerGT]

The pads are super easy to replace. I replaced mine myself just over a month ago with R1 Concepts Optimum OEp front and rear pads.

ugh such a rip off!!!

 

[punkfs]

yeah I've had this shuddering for a while now, currently at 15k . kia won't fix it so would I just be okay replacing with stop tech pads? and original rotors?

 

[MerlintheMad]

yeah I've had this shuddering for a while now, currently at 15k . kia won't fix it so would I just be okay replacing with stop tech pads? and original rotors?

If the OE rotors are ruined, then no. Often, rebedding the pads will make shudder go away; but it will return if the pads put deposits back on the rotors. What finishes off rotors is cementite: harder spots on the rotors from overheating (rotors never warp from the heat of street use; it's not sustainable enough to build up enough heat to deform the metal): once there are hard spots, these wear down slower than the still-soft original iron rotor face, and once you have higher and lower face you throw the rotor away: resurfacing it won't fix it. Probably the original rotors are fine and a resurfacing will work with brand new aftermarket pads. But if rebedding worked with the OE pads, you could replace them right away with aftermarket, bed the new pads, and avoid having the rotors resurfaced. It's not a science so you won't know unless you try.

 

[punkfs]

If the OE rotors are ruined, then no. Often, rebedding the pads will make shudder go away; but it will return if the pads put deposits back on the rotors. What finishes off rotors is cementite: harder spots on the rotors from overheating (rotors never warp from the heat of street use; it's not sustainable enough to build up enough heat to deform the metal): once there are hard spots, these wear down slower than the still-soft original iron rotor face, and once you have higher and lower face you throw the rotor away: resurfacing it won't fix it. Probably the original rotors are fine and a resurfacing will work with brand new aftermarket pads. But if rebedding worked with the OE pads, you could replace them right away with aftermarket, bed the new pads, and avoid having the rotors resurfaced. It's not a science so you won't know unless you try.

Thanks for the reply, I will try re-bed oem and see before I do anything. I bought the car with 8k miles and the issue was already present. Will be an expensive fix if the rotors are no longer good. pretty sad that my kia dealership just told me they wouldn't help me with this issue. would be nice to have new rotors before I put new pads on lol. I guess kia is different, told me brakes are only covered a year after new. when I had my maxima they replaced my brakes like 3 times because of shudder issues up to somewhere around 20k miles and was at least 2 years old at the time... was planning on going aftermarket anyways just was hoping not so soon. oh well!

 

[MerlintheMad]

Thanks for the reply, I will try re-bed oem and see before I do anything. I bought the car with 8k miles and the issue was already present. Will be an expensive fix if the rotors are no longer good. pretty sad that my kia dealership just told me they wouldn't help me with this issue. would be nice to have new rotors before I put new pads on lol. I guess kia is different, told me brakes are only covered a year after new. when I had my maxima they replaced my brakes like 3 times because of shudder issues up to somewhere around 20k miles and was at least 2 years old at the time... was planning on going aftermarket anyways just was hoping not so soon. oh well!

I see: original owners do get preferential treatment: some on here have had Kia replace pads/rotors well past 12K miles as a "good will gesture". But mostly Kia adheres to their 12K miles brakes warranty. And Kia's response is inconsistent: they won't touch some cars beyond 12K miles as warranty repair.

 

[punkfs]

I see: original owners do get preferential treatment: some on here have had Kia replace pads/rotors well past 12K miles as a "good will gesture". But mostly Kia adheres to their 12K miles brakes warranty. And Kia's response is inconsistent: they won't touch some cars beyond 12K miles as warranty repair.

yeah we shall see, I have a 3rd party extended warranty on everything for 100k miles at least. unfortunately the prepaid maintenance plan by ford 75k miles (both provided free by previous owner) is no longer honored by my kia dealership since the reimbursement wasn't enough for them. it does cover wearables including rotors and pads apparently. but they won't replace the pads even if im having issues unless its 3mm or less. so either I just pay out of pocket now or wait until its free but I kind of want to enjoy my car so I guess I have my answer heh.

 

[jthrelf]

Still trying to determine if I should just get stoptech Posiquiets for my 1300 mile GT to avoid any issues down the line. $180 give or take from kahrtunerz. Are people complaining about noise from those?

 

[MerlintheMad]

Still trying to determine if I should just get stoptech Posiquiets for my 1300 mile GT to avoid any issues down the line. $180 give or take from kahrtunerz. Are people complaining about noise from those?

If it ain't broke, don't mess with it. Aftermarket solutions will be waiting, IF the shudder starts; if it doesn't, then why swap?

 

[jthrelf]

If it ain't broke, don't mess with it. Aftermarket solutions will be waiting, IF the shudder starts; if it doesn't, then why swap?

Absolutely! That of course makes sense. My consideration was mainly around not screwing up my rotors with deposits and having to deal with getting replacements / dealing with Kia service. I could just replace the brake pads which is easy and then not have to worry. Or it was pointless because my car would never develop an issue .

 

[Capecod]

3rd time in for me, they replaced everything once and now around 25k later say I need all new brakes and rotors $$ but doesn't look like there's any in stock anywhere?

 

[punkfs]

3rd time in for me, they replaced everything once and now around 25k later say I need all new brakes and rotors $$ but doesn't look like there's any in stock anywhere?

everything is on backorder. stock of everything is so messed up.. im having a hard time getting the replacement oem 4s tires. costco and sams are on backorder. tirerack is also on backorder. good luck man, thats why i havent done my brakes yet. hope they ramp up production for everything!

 

[Navidk]

everything is on backorder. stock of everything is so messed up.. im having a hard time getting the replacement oem 4s tires. costco and sams are on backorder. tirerack is also on backorder. good luck man, thats why i havent done my brakes yet. hope they ramp up production for everything!

Yeah It's crazy I tired to get Cquence rotors and EBC pads...all back ordered. I got front factory rotors and put them on yesterday as I couldn’t stand the vibration anymore. I will change the whole front and rear when things are available tho.

Speaking of tires, good you’re sticking with Michelin. I put on Goodyear and they were terrible. I returned them and got the Michelin.

 

[D.J.]

Yeah It's crazy I tired to get Cquence rotors and EBC pads...all back ordered. I got front factory rotors and put them on yesterday as I couldn’t stand the vibration anymore. I will change the whole front and rear when things are available tho.

Speaking of tires, good you’re sticking with Michelin. I put on Goodyear and they were terrible. I returned them and got the Michelin.

You put on Goodyear what?

That's like saying, you drive a Kia, while it may be true, it's not very descriptive..

 

[Navidk]

You put on Goodyear what?

That's like saying, you drive a Kia, while it may be true, it's not very descriptive..

It was the goodyear eagle exhilarate. In my opinion, whoever doesn’t go with Michelin, it’s making a mistake. Simple as is, you lose your ride quality.

 

[RogueIV]

It was the goodyear eagle exhilarate. In my opinion, whoever doesn’t go with Michelin, it’s making a mistake. Simple as is, you lose your ride quality.

IDK my General G Max RS tires are better than whatever all seasons this thing had as OE but nearly any summer tire is better than an all season. Michelins are great tires but they aren't the only ones in the game, just don't cheap out on tires and pay attention to reviews.

 

[sym]

Still trying to determine if I should just get stoptech Posiquiets for my 1300 mile GT to avoid any issues down the line. $180 give or take from kahrtunerz. Are people complaining about noise from those?

Posiquiets had the same issue in my experience. I was happy with them as basically $60 replacements for the stock pads. I just switched the Stoptech Z26s all around with some drilled and slotted rotors so I'll have to provide an update if the deposits ever come back.

Two things though: I only got deposits either after an emergency stop or when I was driving way too fast. It shouldn't be something you encounter on a regular basis.

I also saw the most bargain basement pads and rotors on Rock Auto - like $20 an axle for Bosch pads and $60 an axle for cheap rotors. Part of me just wanted to put them through their paces to see how big of a difference there really was.