Two more from the driver side, first the assist arm

But there is a lot of corrosion and a crack around Lower Control Arm too

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Now on to the passenger side, everything is marked on here

Note really bad corrosion and crack (photobuck may limit to how much you can zoom to see it)




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Summary: I think the bottom line is the corrosion and cracks near where the assist arm connects to the crossmember are causing all the problems. The assist arm is what is adjusted to limit rear suspension toe-in. After a bump it seems to really flex and a sharp change in toe-in angle. As a result the rear suspension is very squirrelly.

This car is going in on Wednesday so i will report how things go. With this damage the BETTER replace this cross member. One drive will confirm that. I am assuming that an alignment will be done too. I want to know if they will also replace the bushings on the assist arm. Some wear is evident, but you can't really tell until the assist arm is removed.

 

One more interesting picture. This is the other side of the adjuster for rear toe-in.

 

Great pictures..I saw rust on mine but did not look for cracks..will do when changing to winter tires.

If there is crack..I am not sure rust proofing will fix the problem..

 

Thanks CF7. Personally I do not think just doing the anti-rust treatment would work if you are experiencing ANY of the symptoms at all and is temporarily hiding the problem.

Here is what is on the NTSB website regarding this problem. If you want to see it you need to search on the recall number by model etc. http://www-odi.nhtsa.dot.gov/owners/SearchVehicles

SUMMARY:
Hyundai is recalling certain model year 2006-2010 Sonata vehicles manufactured March 1, 2005, through January 21, 2010; and model year 2006-2011 Azera vehicles manufactured September 27, 2005, through November 22, 2010 originally sold in, or currently registered in, Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin and the District of Columbia. Road salt and water can enter portions of the rear crossmember, leading to corrosion of the crossmember steel. This may lead to detachment of one of the rear control arms.

CONSEQUENCE:
Control arm separation may suddenly change the rear wheel alignment, affecting the handling of the vehicle, increasing the risk of a crash.

REMEDY:
Hyundai will notify owners, and dealers will repair or replace the crossmember assembly. The recall began on October 8, 2013. Owners may contact Hyundai Custom Care Center at 1-800-633-5151. Hyundai's recall number is 113.

 

Tagged for follow up

 

Thanks for the comprehensive tutorial.

Though they're production type those welds are sure are butt ugly.

As an "09 owner would it be worth it to wait till the tail end of the recall, say 2 years to go for replacement vs. paraffin coating?

Thoughts.....

 

Neighbor got replacement for his second "113" job today.. both mine been goo, other neighbor was goo also.. not fun to replace,, couple times 3 us us wrass'lin the thing to go back in.. comes right out..

 

thanks for the update and pic. That one seems worse than mine and since mine drives so poorly i wonder how that one handled.

I should have an update later tonight. Back to dealer.

 

thanks for this info...I just made a appointment for Monday at the new Valley Stream location.

 

I'm not convinced the OP has enough rust to matter. I think he may be seeing cracks in the paint caused by some minor cosmetic rust bubbling and not necessarily significant cracks in the metal. That's what it looks like to me.

We'd have to see more, including the area SBR just showed that has significant rust, but I just don't see it in the OP's pics. I grew up in Iowa, where all cars have cosmetic rust like the OP has on the suspension components.

I would guess that the pictured cosmetic rust is not the cause of your handling claims. If the handling really has gotten worse than a normal Sonata (which aren't good to begin with) then I think you should look into your bushings, struts, springs and other suspension components.

The recall warns of components breaking loose and causing handling problems. Why would that small amount of rust cause a handling issue? If the parts were able to flex enough to affect the handling, then I think things would be physically broken or you'd see big, deep cracks going through the metal.

Unless there's more, significant rust that we can't see in the pics, then I think the rust proofing would be fine for the OP. Of course, that's only based on what we can see in the pics.

 

\
I appreciate your comment, but since you haven't driven the car I can't impress upon you that the car just does NOT feel safe. If you are driving at speed it is not until you hit a bump the car will dart to either side in an unpredictable manner. It feels like there is NO lateral stability.

I don't know that i have made it clear that the tires are brand new, it has brand new shocks and has been fully aligned. All this has been done within 250 miles. I appreciate this is NOT a great handling car, but even less than a year ago with worn tires the car did not exhibit this behaviour.

I have not bothered posting the myriad of other pictures i had taken because there is nothing to show... ie, no corrosion or other problems that are visible. No bushing wear is evident on ANY of the bushes that one can see and i have had some experience with this on other cars i have had. and as far as springs being a problem, except for a spring being broken what other failure does a spring exhibit and if it had an issue you would be experiencing that all the time.

The small cracking i have noted is specifically on the welds holding the assist arm which is what controls the toe on the rear wheels. If this arm deflects even a little bit because of the cracking it can cause rear toe to change. I too am not concerned about surface rust that is purely cosmetic. It is the rust and cracking on welds that is more than concerning.


So far NO satisfaction from the dealers, although they have yet to drive it. (which i am very unhappy with that too) The service and attitudes i have seen are less than stellar. Once again the service writers seem more intent on finding things to write up for more service than what the car was brought in for.

 

I can tell by looking at his pics that his has trivial surface rust.. the rotted 1 we got was obviously rotted just by looking.. neighbor put car up, and could tell before he got under car it was not go to be a good morning..

Brother Flots' car looks like the vast majority we seen already, normal surface rust from exposure.

Did have an Azera last week, back tracked selling dealer to Chicago.. this thing nicely rusted, lots of chunk surface rust, peeling rubber coat that Hyundai dipped the parts in,, but it still passed the punch test in the places they specify,, and I even punched a few other suspect areas,, it pass, so it got goop and sent on it' way.

 

Ok so the question is where do i go from here? I already have new tires, new shocks and a car in alignment. Do i systematically have to replace every single component in the rear suspension when there is NO visible damage to any of them?

If this car showed up in your bay what would YOU do next?

 

I'd ask to go for drive with you, and see what is happening following your direction,,, like that going to happen in some shops..

Visual of parts, tire air, and I dont know if I have asked before, do you have the actual current align numbers that they set to car to before return to you ? I got a nasty align today that if I was customer and knew anything about aling numbers, I be raising a storm of why the numbers so jacked up,, I need to scan and post this car.. it CRAZY.. as they say,, "IT's in specs",, but relate the numbers to making a square..

 

thanks SBR I appreciate your honesty. I guess you can tell i am quite exasperated with the treatment i have received. and as i have written before I have a great deal of respect for technicians that are actually interested in solving problems like yourself. Having two shops unwilling to actually be interested in solving the problem is really grating. Instead once again they seem to want to do these "safety checks" which is about finding things they can charge for instead of actually trying to solve the problem the car came in for. So no test drives ........

I will see if i can locate the alignment specs from when i got the new tires and rear shocks.

 

I feel I have a similar issue to you. I know this is an older post, Flotsam, but I hope you see this.

I notice this mostly on the highway, but anything over 30mph causes a rear end shimmy.
I find it's most prevelant when there are lateral forces on the vehicle, such as taking a clover leaf on the highway. Any bump or crack I hit causes the ass end to shimmy back and forth. Are you thinking that the trailing arm supports on the rear cross member are flexing due to corrosion which causes this shimmy?

I bought this car off of my mother at about 65,000 miles, with the car spending around 5 years in Minnesota winters. I have always noticed this rear end shimmy. Even in a straight line the rear wiggles over every bump.

Unfortunately I took it to the dealer for the recall and they applied the rust proofing, so I feel like there won't be any way to examine the cross member fully.

 

They inspected it when they performed the recall. They used the wax because you evidently don't have rust problems. If you reread the thread you'll see that most cars that are inspected don't need the rear subframe replaced, according to the Hyundai tech who has posted in this thread.

Remember, the OP started this thread on an incorrect assumption. He appears to have only very minor cosmetic rust that would not cause his claimed problem, and that was also confirmed by SBR, who is a Hyundai tech.

 

So what is the problem? Do all sonatas have the same issue? Worn bushings?

 

The original poster never updated the thread with his solution, if he found one.

My Sonata with 112k miles does not exhibit this problem.

Judging by your symptoms, you need to make sure you don't have a bad tire or bad tire balance and start checking the other basic things

 

I have an 07 Santa Fe that had the front subframe checked 2 years ago, but now the rear is rotting out of the car. I called Hyundai and they said I need to have a dealer inspect it to see if it is related to the campaign. I told them I also had an 06 Tuscon and the rear subframe broke while my daughter was driving it. That also did not have a recall but when I told them that all of the sudden please bring it to the dealer, towed at their cost. I said they were lucky no one was hurt or killed. I told them the same thing today and asked who do I call when it breaks and someone is hurt or killed. They said please bring it to a dealer for inspection......I'll update once I get some sort of resolution.

 

Right on!

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