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Discussion Starter #1
Hi all! I just got a 2016 Elantra GT GLS (Canada). It seems like overall a great car but I am having what seems to be the dreaded rear suspension issue that everyone talks about on here. Sorry to start a new thread but I can’t find much info specific to this year-model of car. If I had known about this issue before buying, I would not have bought. Too late now!

Can anyone tell me if replacing the rear shocks with the KYB GasAJust everyone talks about will fix it or will I really not notice a big difference? There’s only 55k miles (90,000km) on it. Is this actually a safety issue or does it really come down to the style and comfort of the car?

my issue is that when I go over bumps, railroad tracks, and especially expansion joints on curves, the car seems “slidey” and “bouncy” And makes me feel like I need to steer to compensate. The front tires are brand new, rears are used With 50% tread. There is no loud noises or clanks or bangs...just side to side and up and down bounciness.

as a test, I drove along straight road without my hands on the wheel at speed. While going over bumps, the car would bounce a couple times side to side, or up and down, but without any noise, and without a loss of control. the front end seems ok - Not too bouncy.

is this just something I have to live with or will replacing the rear shocks fix this?
Are these the right shocks for the KYB Gasajust? It won’t let me post a link to amazon but here’s the info:
KYB gasajust model 554384
Amazon price $87 Canadian.
A Kijiji mechanic will charge me $70 for install.
 

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Yes the KYB Gas-a-just rear shocks do help with that side-bouncy from the rear. It’s an easy DIY, if you have the tools. The OEM shocks are total crap when you compare with the KYB’s.

when I first got my “new to me” 2014 GT, the braking performance, especially in wet roads, scared me. I replaced the crap OEM tires and got performance Cooper tires and got new rotors and ceramic brakes. And now the car stops very nicely and the wet road performance is very good.

now I’m having a hard time finding good front struts.
 

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Discussion Starter #4
How do you think changing the front struts will improve performance?

I guess that’s my concern, is my problem actually due to front or rear issues? It may be that the front is what needs stiffening, but I’m feeling the sensation in the rear. The rear shocks are a relatively cheap and easy driveway fix. Front struts? A little more involved. And because I’m new to this car, it’s hard to say whether just changing the rears will actually do it for me or do I need to alter the front suspension too?

I read somewhere that the way the car is engineered makes it impossible to truly correct the issue. Something about a torsion beam? I don’t know enough about cars to say.

In a couple months I’ll change the rear tires to all-weather (winter-rated) tires, which might make a small difference In the rear too.

I do appreciate your advice and thank you for confirming the part number!
 

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Discussion Starter #5
Wow, just went for another drive, day 2 of owning this car, drove through a construction zone on the way home, and the bumps were out of control and I mean, OUT OF CONTROL!:oops: If I had drinks in the cup holders they would have surely spilt all over the place.

I’m wondering if it’s actually fixable or if this is something inherent in the car and I should just sell it ASAP...I just went through 2 months of car anxiety with a 2003 that finally had to be towed to the junkyard...and now to be driving a 2016 and already facing issues the day I take it off the lot? Is very stressful, and especially considering what I paid for it... :(

I feel like this shouldn’t be an issue, and that it’s gotta be my shocks. Elantras are such popular cars, all those owners out there can’t possibly just live with this???!:oops:
 

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Get the KYB’s for the rear. You’ll be happier! You’re getting buyers remorse but if the car is in good condition. Make some changes and enjoy it.

With the KYB’s in the rear, going over railroad tracks or speed bumps are not jarring and they keep the tires on the road, so you don’t get the hop and out of control rear. The car has a basic torsion beam. No double wishbone.

I bought the car 2 years ago. It has 51,000 miles now I changed the rear shocks around 3 months ago. I want to change the front since I changed the rear plus I wanted a little stiffer up front.
This is my first compact car (I’m 53) ever. Right before this car I drove 3 BMW’s for 20 years. Yes it has been a big step down but I wanted to pay cash for the car, use 87 octane (I have used 93 octane all my life because all my prior cars required it) and I wanted a car where I could buy good tires around $100/ tire. I got tired of spending lots on cars and I’m changing my properties.

This car is cheap to operate, has been reliable, Easy as **** to work on. I love to hatchback and the room I have inside. The big depreciation someone else paid for that! Yeah I compromised but I definitely don’t feel cheated. It is kind of fun to drive. Tires did make a HUGE difference.
 

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Discussion Starter #7
I ordered the shocks and I’m gonna investigate further. If I change Em I’ll report back here with the results. Just hoping they’re not so stiff for this car that they cause clanking and banging.
 

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Does your car have the 16" wheel or the 17"? There is a difference in the shocks and struts between the two wheel options.

With 16" wheels:

Front strut lft: Hyundai 54651-A5350
Front strut rt: Hyundai 54661-A5350
Strut Dust Cvr: Hyundai 54625-2F000

Rear shock: Hyundai 55300-A5700


with 17" wheels:

Front strut lft: Hyundai 54651-A5400
Front strut rt: Hyundai 54661-A5400
Strut Dust Cvr: Hyundai 54625-A5000

Rear shock: Hyundai 55300-A5800

The strut used on the 17" suspension requires a different
dust cover. The front sway bar links vary depending
on manufacturing date (at least for the 2014, maybe others).

Same springs called out for rear, front depends on manual
verses automatic. Same rear axle, same front sway bar.

The hopping is also greatly improved with the addition of a secondary rear stabilizer bar. I used the Progress Technology bar ($165) on my 17" alloy wheel equipped '14 and took the handling from good to go-kart without ride harshness and almost eliminated the side hop. I am running Michelin Pilot Sport AS3+ tires.
 

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Discussion Starter #9
Does your car have the 16" wheel or the 17"? There is a difference in the shocks and struts between the two wheel options.

With 16" wheels:

Front strut lft: Hyundai 54651-A5350
Front strut rt: Hyundai 54661-A5350
Strut Dust Cvr: Hyundai 54625-2F000

Rear shock: Hyundai 55300-A5700


with 17" wheels:

Front strut lft: Hyundai 54651-A5400
Front strut rt: Hyundai 54661-A5400
Strut Dust Cvr: Hyundai 54625-A5000

Rear shock: Hyundai 55300-A5800

The strut used on the 17" suspension requires a different
dust cover. The front sway bar links vary depending
on manufacturing date (at least for the 2014, maybe others).

Same springs called out for rear, front depends on manual
verses automatic. Same rear axle, same front sway bar.

The hopping is also greatly improved with the addition of a secondary rear stabilizer bar. I used the Progress Technology bar ($165) on my 17" alloy wheel equipped '14 and took the handling from good to go-kart without ride harshness and almost eliminated the side hop. I am running Michelin Pilot Sport AS3+ tires.
oh my god. I don’t know if I got the right rear shocks then. I have the 16’s. I already ordered the shocks on amazon And received one of the two today (weird shipping). I can’t post links on this forum for some reason. They’re the KYB 554384’s. All the parts searches I have done don’t differentiate between the rim sizes. What gives? I would hate to go to the mechanic only to find out later that I have the wrong size
 

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oh my god. I don’t know if I got the right rear shocks then. I have the 16’s. I already ordered the shocks on amazon And received one of the two today (weird shipping). I can’t post links on this forum for some reason. They’re the KYB 554384’s. All the parts searches I have done don’t differentiate between the rim sizes. What gives? I would hate to go to the mechanic only to find out later that I have the wrong size
Those are the correct KYB shocks as they replace all Hyundai part numbers. The only different with the KYB parts is they have one for the Accent/Veloster then one for all Elantra models. Slightly different lengths and stroke is really the only difference.
 

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As stated above, KYB doesn't differentiate and the shock they list should be fine. BUT, and this is for anyone reading this thread, KYB is the exception. Monroe, Gabriel, and many others do not differentiate and go with the softer shock and spring, even on the struts. Learned this the hard way when replacing worn out Hyundai springs and struts with Monroe. Destroyed the handling of a 2006 Elantra GT.
 

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And if anyone from the 12-16 Elantra sedan is reading here, ADD THE REAR STABILIZER BAR! The sedan has no integrated roll bar in the rear axle and bounces around like a ping pong ball. Add the Progress Technology or (I think) Pierce bar and the difference is astounding! Even with the stock shocks. But not the Whiteline bar. Several posters had the Whiteline bar snap on them. I have been running a Progress bar for several years on the '14 GT and for two years on the '16 Elantra SE sedan. No complaints whatsoever.

Edit: Just noticed that Whiteline no longer shows the Elantra bar on their website.
 

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Have 2013 elantra coupe.
Experienced that dangerous side step at the rear.

Changed to Michelin tires and sold the original ones

90 per cent better
I have not added a stabilizer bar as I am an old guy who only races when the wife is not piloting in the copilot chair.


Other problem is clicking engine similar to tappet noise.
There is a hidden factory recall for this on 2013 year
I had an engine rebuild to fix it under recall
US made engines.

Uneven idle is a known problem
They did a software update that improved that a bit but now the idle is around 500rpm which is now causing erratic idle.
Will have them adjust that next visit.
 

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oh my god. I don’t know if I got the right rear shocks then. I have the 16’s. I already ordered the shocks on amazon And received one of the two today (weird shipping). I can’t post links on this forum for some reason. They’re the KYB 554384’s. All the parts searches I have done don’t differentiate between the rim sizes. What gives? I would hate to go to the mechanic only to find out later that I have the wrong size
you are good with what you ordered for KYB's.
Your description of what is happeneing with your car is not usual... i have a 2013 with stock suspension. I have considered upgradiing to KYB's just to see what difference i would see. Id expect it to be slightly firmer (I have the 17" wheels and suspension shocks)
I think you will notice a difference with the KYB.
As a next step(s) I'd consider installing an aftermarket sway bar (a couple choices of those) and checking the REAR alignment which is not adjustable ... but several people have found it out of spec. If alignment out of spec... under warranty, Hyundai would replace the entire rear axle. The other option is finding an alignment specialist who can shim the rear hub(s) into alignment (a $200+ job). He is probably the best place to check the alignment.
Stock tires suck too.
Where you located? If in the GTHA area... I know an (excellent) alignment specialist near Hamilton... if you need him. He shimmed my rear hubs (I saw tire wear)... and another guy who was here who was experiencing similar to your issues with bouncy handling.... and he had already installed the KYB's which helped... but didn't solve it for him..
 

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Interesting that quite a variety of tires were put on Elantra Sedans, Coupes, and GT's. My '14 EGT with the 17" wheels came with Nexen's. Handled pretty good, but were on the wear bars by 17K. I've seen Hankook and Kuhmo also. Back when I bought a new 2005 Elantra GT it came with Michelin Defenders.
 

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Discussion Starter #16 (Edited)
@justink @flemmons @Gator1PK @Clockmendergb @warpdriv

NEWS NEWS!!!

i did the shocks tonight and it’s markedly improved. I would say it’s met 75% of my expectation. no more side to side shimmy over expansion joints and streetcar tracks.

what I did notice after installing them was the softness of the front. when the stock shocks were on, I felt the bounce and side-shimmy more in the rear. But now that that’s mostly cleared up, I can feel the Front end’s suspension much more distinctly. I did get at least one BANG in the front end going over a raised bump at an intersection at speed.

So, while it’s not a priority, i’d like to Look into replacing the front struts. I don’t know much about cars, But if I do it, what would I be looking to replace? The Entire front strut assemblies (spring plus strut)? Or just the strut itself? (Leave stock springs)

being that this is a Hyundai...I really don’t wanna put a lot of money into it. So hopefully I could get away with The struts only. I wonder what brand is good.

so anyway the main message is... if you’re thinking about changing the rears...do it. At worst, you’ll find the suspension At Least as good as it was before. And at best, you’ll like it a lot more.

And now onto my next annoying issue... trying to figure out where the irritating passenger side rattling sounds are coming from near the rear door and front sunroof areas:mad: i’ll start a new thread for that one another day
 

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Now you know why I want to change the fronts. At times I go, it feels too soft...no it’s ok. But I must change the front. The rear KYB’s are not stiff but they do a great job dampening the rear. :D I have the 16” wheels. Glad you got the tears, now if I could find the KYB’s for the fronts. In the KYB website, they list the KYB front struts and part number. But can’t find them anywhere
 

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Discussion Starter #18 (Edited)
Post the part number and the type of strut it is called on KYB’s site. I didn’t see the gasAjusts for the fronts.

post that info and let me see if I can dig up a source for them on this side of the border, sometimes our supply chains are different and we have access to different suppliers in Canada
 

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hmmm... available 3rd qtr... I guess that will be soon.
Good find! Those numbers (not surprisingly) fit other years (2013) as well.
 
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