Have been driving across country for about 2k miles. without fail, there is a faint, plastic intermittent rattle sound when reaching 70 mph. seems like there is air flow going to a place under the hood and dash, that causes a loose small part impinge against a plastic housing of some kind. i don't know, just guessing. new car, so it's disappointing. otherwise the car is great, I love it. Anyone have similar sound?
schmedley
21 - 40 of 167 Posts
Joined
·
3 Posts
Have the same problem on my 1 week old hybrid, comes from driver's side on interstate at speeds of 65+ but only when going over bumps. Almost like a strut is loose/broken. Haven't gone to the dealer yet.
I didn’t want to wait for a service appointment so I got down on the ground to look under my Tucson hybrid blue at the plastic cover mentioned by Ron. There are about 3 plastic screws and some metal screws holding the plastic up. All the plastic screws were loose and a few metal ones also. I tightened them on both sides and have not heard the rattling after a week. Hoping that was the culprit. If you can wait, let the dealer take care of it. Took me awhile to get back up off the ground! Lol. Good luck!
Yes, I forgot to mention the screws on the wheel well may also be loose.
I believe the plastic nuts on the large, floppy covers underneath the car are meant to be an aid in attaching the unwieldy parts. The aero cover under the engine has one also. The plastic nuts are captured, i.e. they do not fall out if you loosen them all the way. A mechanic working alone would lift the cover up and screw the captured plastic nut onto the stud first. That holds the cover up so he can screw in the bolts after. I believe the plastic nut is only meant to be hand tight.
Joined
·
1 Posts
MIne also sounds like its coming from the sunroof like to the left of my head. Its always at 65+mph and is consistent on the highway. It pretty annoying since I have about 40 miles each way to and from work on the highway.
Do you have roof rails? I had noise at freeway speed and it went away when I took them off
Sent from my Pixel 5 using Tapatalk
Joined
·
84 Posts
I had the noise from the roof racks took them off still have noise from front door windows
There is a private facebook group I've seen some people complaining of loud noise on, they found it came through poor sealing on the side mirror (one side or the other). Could that be the source of your noise? It was allowing air to enter the cabin at speed, I don't remember exactly how it was fixed. If it's every single drive then your dealer should be able to recreate it and fix easily.
Joined
·
2 Posts
Thank you, Thank you for that solution to tighten down the plastic nuts under the car. I took the car to the dealer (Roger Beasley in Austin) and was told that there was no problem and it was just normal wind noise. After crawling under the car for 5 minutes feeling around for the plastic nuts, all of them were loose. Noise is now gone and we are much happier.
Hi Ron J. This is Schmedley, the 'Discussion Starter' on this topic 6 months ago. thanks for the suggestion. I tried what you described. It was very easy to see that long plastic under carriage plate under the drivers side of the car. it was very easy to see two plastic nuts on it, and yes, they were loose. I tightened them and took a test drive. The faint plastic rattle at about 60-70+ mph is still there. I will have to try something else. thanks.
Hi KN2. This is Schmedley, the 'Discussion Starter' on this topic 6 months ago. thanks for the suggestion. I tried what you described. It was very easy to see that long plastic under carriage plate under the drivers side of the car. it was very easy to see two plastic nuts on it, and yes, they were loose. I tightened them and took a test drive. The faint plastic rattle at about 60-70+ mph is still there. I will have to try something else. thanks.
Joined
·
5 Posts
I've had this too! On the highway or when it's windy out. Trying to figure it out.
Joined
·
5 Posts
Has anyone found the cause of the plastic rattle and what it was??
One person's "plastic rattle" may not be the same as another person's "plastic rattle" so there are many causes and many solutions.
Joined
·
5 Posts
That's good to know!! Thank you so much!
Joined
·
5 Posts
I think you're correct. I believe it's my back driver's side window that's rattling.
Joined
·
5 Posts
Hey guys! Just an update. I took my car to the dealer and the big plastic shield that's on the bottom of my vehicle was incredibly loose. No more noise!
21 - 40 of 167 Posts
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
