All my earlier comments on this forum are directed at reality. When "multiple" people complain about an issue, someone always chimes in eventually and makes the problem bigger; sometimes even asserting that "all" Stingers are affected. That's when I chime in and say "no, not all: mine doesn't." And off we go.
On this thread, I mentioned what I heard in my car, then presented a few possible causes to look into.
In this specific case: It seems likely that something in the way the rear end works causes a "thump" sound when calling on the car to perform (as opposed to just driving the car normally). When I am accelerating and cornering in a "spirited" manner, I don't expect the car to remain quiescent and noise free. So any additional noises that manifest under more demanding conditions are considered "normal operation." That is a Kia manual phrase I've run into many times. Notably under Brembo "high performance" brakes. "Scratching" or "rrrrr sound" is explained as "normal operation" and not a defect, etc. This "thump/thud" sound when going over bumps, especially at speed, shouldn't be bothering anybody. It's in a completely separate class of car noises from a continuous and irritating "rattle".
So my advice is: "If it ain't broke, don't bother with it." Don't expect perfection. Don't set your expectations of a complex machine so high.
Again, I can, and do respect, that your experience is different.
Our experience is a direct result of our knowledge, expectations, operating environment, and sensitivity.
I will admit I am a stickler for refinement. That being said, I take few issues with the Stinger under “demanding” conditions. When pushed hard, the vehicle comports itself very well.
The improvements I would like to see are evident in day to day regular driving.
If you can’t detect (or don’t have) an issue being talked about that is a good thing...
But to accuse me of “bashing” the Stinger because I am familiar with the issue is overstepping.
Don’t be so dismissive of others and their concerns. Mind you, I am never in a thread just talking to myself. Any issue I have spoken on has had multiple people with the same issue. Telling all of those people to “live with it” “it’s not broke, don’t fix it” fails to further the platform or that individual.
I haven’t experienced the brake rotor issues many people have complained about, on my own particular vehicle.
But I’m not gonna dismiss the countless people who have logged on here, other places on the net, and even magazine reviews, by telling them Stinger brakes can’t get better leave it alone.
Even though I haven’t had the issue, I can appreciate that others have, and want to provide a solution to them (and possibly myself if my rotors start causing vibration). The issue is common enough, that yes, I’d like to see Kia make the braking system more robust.
Back to this thump, though...
You say leave it alone... No, Kia needs this feedback. User that hear the thump need to know that many Stingers do the same. Potential buyers need to know to listen for it during a test drive, so that they can make a more informed purchase decision. Camry, Accord, Altima, Malibu, 3-series, Xf, xe, Gs, Is, CT’s, etc... ride without this sound. It is not too high of expectation that the Kia also do so as well.
Again, cars are my passion and I drive quite a few examples of lots of models... That affords me a clear picture of what is normal, or unique, or distinctly different from the rest of the herd. The Stinger is damned good. But I will assure you that Kia still has work to do. If you think I harshly criticize the Stinger, you should drop by the BMW forums and see how we lambasted BMW for things like Steering feel, rear suspension bounce on the 3 series, and turbo failures. The end result was people being more aware of issues and subsequently BMW making changes (sometimes, mid year) to correct or improve those issues. The forum members frequently put there heads together and pioneered fixes, even before BMW could or would.
This is not about expecting to much. Your expectations are what they are. And that is fine. But let’s not be dismissive to those who desire Stinger (as a whole) to be even better than it is. You’ve made it clear that you think the Stinger is just about perfect (for you) as is. Kia has some pretty lofty expectations of Stinger, themselves. They need this feedback to get there... The mentality of “it’s good enough, as is” wont help propel Stinger to the next level. Especially, not when there are a good handful of issues that need to be addressed to be on par with its premium and regular sedan competition.