flutter @ 25-30mph

[zape]

I think I also hear it now.
What's the cheapest way to fix out of warranty?

 

[MyGenesis5L2015]

I finally was able to take the car in for diagnostic and trying to put acoustical sensors to isolate the noise.

The service manager called me and provided the following information:
He reached out to a Hyundai expert in diagnosing and solving problems like this. The noise as I previously described the expert indicated he knew exactly what it is..... wait for it ... drive shaft.
Thank you all for providing me information to get a much quicker resolution to this issue.

The expert asked the service manager to do the following as confirmation that the issue is the drive shaft. Empty out center console of all items and leave open when driving the car. The noise will be “amplified” (open baffle), coming out of the center console, and heard under driving conditions not previously heard. The service manager confirmed this was the case and has now ordered the driveshaft assembly to replace. That will be in about 2 weeks.

I’m now headed to pick up the car and will provide updates if the information above needs editing and after the drive shaft assembly replacement.

 

[G-635381]

Part number on invoice was 49100-B1100 shaft assy-propeller

great news, I have same noise and dealer never addresses, 'couldn't replicate'. I have 37k on my 2016 now. Expect a fierce fight on this one!!

 

[biswasd]

great news, I have same noise and dealer never addresses, 'couldn't replicate'. I have 37k on my 2016 now. Expect a fierce fight on this one!!

keep in mind the part # changes for HTRAC vs FWD versions of the car...and the part # provided above is only for the rear part of the shaft assbly including the propeller....would also need the part # for the front.

 

[MyGenesis5L2015]

Please see if the test conditions match (cold and then noise happens on coasting from 35 - 25 mph for about 20 min, then goes away).
I took car in the evening before, they test drove it cold the next morning, and duplicated the fluttering sound.

As for the warranty post previously, I would still take it in and ask the question while letting them know this is not a one off issue. Other owners are having the same problem.

FYI, I did ask if there was any redesign of the shaft assembly that was ordered and I was told they don’t have insight into that from Hyundai. Then I indicated if there was no redesign to fix the root cause and the same parts are being installed again, my expectation is the issue will reoccur it is just a matter of time. At which time I will visit them again asking is it a defective design, defective part, or improper installation.

 

[biswasd]

couldn't agree with all that you stated. this sound will come back - only a matter of time, b/c the part is defetively manufactured or designed. this is a product liability issue for Hyundai - they just don't want to admit fault. Classic product liability issue from law school....next time i'm going wait a year or two before buying a 1st model year refresh vehicle.....

 

[Origin_G80]

couldn't agree with all that you stated. this sound will come back - only a matter of time, b/c the part is defetively manufactured or designed. this is a product liability issue for Hyundai - they just don't want to admit fault. Classic product liability issue from law school....next time i'm going wait a year or two before buying a 1st model year refresh vehicle.....

Doesn't matter first year or not. Mine is 2017 g80 and makes that noise. I have over 150k miles on the car so far with no issues. So it's just noise. Learn to live with it or just play music louder.

 

[zape]

Doesn't matter first year or not. Mine is 2017 g80 and makes that noise. I have over 150k miles on the car so far with no issues. So it's just noise. Learn to live with it or just play music louder.

Wow that's a lot
Did you clean the intake valves btw?

 

[biswasd]

Doesn't matter first year or not. Mine is 2017 g80 and makes that noise. I have over 150k miles on the car so far with no issues. So it's just noise. Learn to live with it or just play music louder.

Unfortunately my ears can't learn to live with it....

Suprised to see that the issue is present inn2017 models as well. More evidence to suggest a design defect after all....

 

[PatrickStern]

All it is is the airbox in the engine bay, it has a flap that opens to allow more airflow into the actual airbox. You can check it out yourself. Go and open up the airbox and take out the air filter, then you see this short looking tube with a flap on it that has a magnet, once enough air hit it, it opens up and you get the flutter noise for a few moments, and then it goes away.

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[biswasd]

I dont think this is an Airbox issue. My tech used electronic sound isolation equipment to determine that the noise is from the center bearing in the.drivedhaft

 

[PatrickStern]

Ohhh, in that case, my bad, i just have the same issue and i've noticed it went away after i kept the little flap open,

 

[hamed57]

I have a strange problem. My car vibrates 25-40 MPH but there is no sound or flutter to it!
The vibration goes away for the most part after 5 minutes of driving. Could it be the same problem?

 

[biswasd]

I have a strange problem. My car vibrates 25-40 MPH but there is no sound or flutter to it!
The vibration goes away for the most part after 5 minutes of driving. Could it be the same problem?

If the bearing is bad or the front portion of the shaft or rear portion of shaft has a slight bend in it then yes. Or it could be rear differential. I had the same vibration when doing slow turns. But was resolved when rear shaft and propeller assembly was replaced due to flutter.

3.8 AWD

 

[Gennadiy]

I’m having a hard time convincing my dealer that this is an issue. Every time I take it in their response is that it’s normal and all Genesis cars do it. They were able to replicate it with another used genesis on the lot. My thought is that two broken cars doesn’t mean it’s a normal thing. Any ideas on what I can tell them so they’ll actually fix it? They said they’ve been in contact with tech line and they said it’s normal. Help me out here.

 

[biswasd]

Contact Hyundai corporate via email. I emailed the CEO as well as VP of customer care. Send a certified letter and link this forum. This is a manufacturing or design defect aka product liability issue.

 

[Husam]

I’m having a hard time convincing my dealer that this is an issue. Every time I take it in their response is that it’s normal and all Genesis cars do it. They were able to replicate it with another used genesis on the lot. My thought is that two broken cars doesn’t mean it’s a normal thing. Any ideas on what I can tell them so they’ll actually fix it? They said they’ve been in contact with tech line and they said it’s normal. Help me out here.

Show them this forum post.. Ask them to man up and do their job right.

Good luck!

 

[astrix]

The dealership just replaced drive shaft to resolve this issue. However, now the overall background noise has gone up while car is idling, fluttering noise seems to be more frequent compared to occasional when weather was cold, car also feels bit more hesitant/sluggish or gears seem to be sticking. At this time, I can't tell if it's an artifact of incorrect installation or the result of new component in the old system. Now I'm second guessing proceeding with the replacement and not pressing to find out from the Hyundai engineering team whether this was a critical issue or a nuisance. Has anyone seen this happen after the replacement? Any thoughts?

 

[biswasd]

Something is not right with the install. If both parts of driveshaft and propeller assembly were truly replaced, then what you're hearing is extremely unlikely.

 

[astrix]

Noticed these two numbers on the replacement paperwork: 49100R00 and 49100-B1100