Whistling noise from rear spoiler (merged)

[Ralegend]

Hello, I’m experiencing the same problem. Between speeds of 60 and 90 kilometers per hour, there’s an irritating sound that resembles either metal scraping or a bird chirping. It’s truly unbearable. I was wondering if you were able to find a solution to your issue?

I’d appreciate any guidance or insights. Thank you!

Hello. I live in İzmir, too.
I would be very happy if you could help me with this matter.
I'm tired of this noise.
Thank you.

 

[Wizard of Oz]

Mine is booked for next week to have them "look at" the bulge. I get they can't confirm they'll do any work over the phone. My MG4 is a Jan 2024 build. The service desk person didn't seem to surprised to get another call on this.

Am I right in believing the tray in question is at the front of the car? I've just had a look and everything looks flat for the "seam" near the front wheels, or should I be looking closer to the front of the car.

EDIT: Actually, it seems to be the rear of the car I should be checking! I will get back to you...

 

[Coulomb]

it seems to be the rear of the car I should be checking!

Yes, the rear.

 

[Wizard of Oz]

Assuming it's the tray that ends about a foot in front of the rear wheels, then it's all flat.

 

[ReintjeWA]

Assuming it's the tray that ends about a foot in front of the rear wheels, then it's all flat.

Yeah that’ll be the one. I noticed mine starting to warp about 6-8 weeks after receiving the car (although perhaps it was like that when I got it, I wouldn’t know). The dealer (Wangara MG) said they have to look at it before they can do the remedial work, so here’s hoping they won’t fob me off. It’s not as bad as I’ve seen on some pictures, but it is definitely warping. It’ll be an interesting test to see if I want to go back there for service in two years time.

 

[bllgn]

Hello. I live in İzmir, too.
I would be very happy if you could help me with this matter.
I'm tired of this noise.
Thank you.

Of course, I ll let you know if there is any change. I got the part today and will try to install it. Let me share the link as well. By the way, i m in Izmir too.

https://shbd.io/s/W40UODHc

 

[DixieTGS]

There is a service campaign (probably the wrong term) that should be applied under warranty:
AS-TEC-02112023-01
I'm in Australia, but I'm 95% sure that the A at the front doesn't make it specific to Australia.

Mind you, the free version is basically a metal bracket and some longer bolts; your solution looks slightly neater. Not that one often looks under the car...

This is to fix what we seem to be calling the "under-tray bulge". It's sad to see these still turning up.

The European equivalent is think TI-20231228-EH32.

The file:
TI-20231228-EH32- Rear Subframe lower guard to Battery Gap - CEE.pdf
from @siteguru 's website

Index of /MG4/Manuals

has a photo of a typical example. Mine was possibly not that bad and certainly no worse - it was fixed without having to persuade them at all.

My dealer has only recently taken over the franchise so was unaware of the problem, but were quite happy when I showed them the document and photo.

 

[bllgn]

Friends, I installed the part under the car, but unfortunately, there was no change in the scraping sound.

 

[Coulomb]

Friends, I installed the part under the car,

Did you install the bracket with longer bolts, or did you replace the whole under-tray?

My understanding is that there is some weird flaw in the design of the captive nuts and/or bolts are too short. So it seems that the full fix is the bracket plus some longer bolts, possibly with large washers.

There might be clues in the MG bulletin relating to the bracket replacement. From memory, it has been posted on this forum somewhere.

 

[bllgn]

Yes, I installed it with longer bolts and large washers.

 

[Ralegend]

Friends, I installed the part under the car, but unfortunately, there was no change in the scraping sound.

Any update? We need to get rid of this irritating noise.
Thank you.

 

[bllgn]

idk Im continuing research Unfortunately, there is no change, still continue irritating noise

 

[Coulomb]

See also this thread:

Creak in rear/boot (with solution)

[ Moderator: Solutions start at this post. A good step by step summary of the best solution can be found here. ] Good morning, My MG4 Trophy is 7 months old and has developed a creak in the rear/boot. This does not happen on smooth roads, just on uneven country lanes. It seems to be if the...

www.mgevs.com

 

[bllgn]

See also this thread:

Creak in rear/boot (with solution)

[ Moderator: Solutions start at this post. A good step by step summary of the best solution can be found here. ] Good morning, My MG4 Trophy is 7 months old and has developed a creak in the rear/boot. This does not happen on smooth roads, just on uneven country lanes. It seems to be if the...

www.mgevs.com

Yes, I checked, and unfortunately, the sound doesn t change based on the road condition; it only appears or doesnt appear depending on the speed.

 

[bllgn]

I have a whistling noise from the rear of the car when driving between 40mph and 70mph (not that I ever drive above the 70mph speed limit).

After much pestering the dealership informed me there was a new bracket that could be fitted between the 2 plastic undertrays as this is where the noise was coming from. It's booked in at the end of the month.

I found the root cause of my disturbing noise problem. The issue was caused by the spoiler. I will add photos of the solution, and I will also contact the service for a resolution. I will update again.

 

[siteguru]

I know some people have complained about those spoilers needing tightening up from time to time.

 

[Ian Key]

I found the root cause of my disturbing noise problem. The issue was caused by the spoiler. I will add photos of the solution, and I will also contact the service for a resolution. I will update again.

I think someone posted some time ago that they ran a bead of silicone sealant along the join in the spoiler to stop the whistling.

 

[Ralegend]

I found the root cause of my disturbing noise problem. The issue was caused by the spoiler. I will add photos of the solution, and I will also contact the service for a resolution. I will update again.

I haven't tried this solution before. I will try it and post a reply.

 

[DixieTGS]

I think someone posted some time ago that they ran a bead of silicone sealant along the join in the spoiler to stop the whistling.

This one ?

Whistling noise from rear spoiler (merged)

I have updated my profile. I own a Trophy ER (v1 that i've bought end of 2022) I'm in France btw Is that a typo? Did you mean end of 2023? (The ER wasn't available in 2022, it came out in Q3 2023). Or did you mean the Trophy LR?

www.mgevs.com

The blue tape and red highlight in his photo show the exact area that his problem came from.

 

[Ralegend]

I found the root cause of my disturbing noise problem. The issue was caused by the spoiler. I will add photos of the solution, and I will also contact the service for a resolution. I will update again.

I was at the service center last Saturday. I wanted this problem to be solved for the second time.
They stated that they have used a silicone gel to the area. But the noise is still there.

When I find something that will not damage my vehicle's paint, I will try the @bllgn 's solution.