MG4 X Power Vibe/Hum 65to75mph

[Chequers]

Is that a comment on all UV joints or do you have a concern only with the XPower UV joints?

I have concerns regarding the extreme angle of the front drive shafts.

 

[JustAnotherMidlifeCrisis]

What about the UV joint in other machines? I don't think the MG angle is unusual having looked online.

 

[Chequers]

What about the UV joint in other machines? I don't think the MG angle is unusual having looked online.

Driveshaft phasing and angle - Video : MGB & GT Forum : The MG Experience

A very good video that someone posted on one of my Cortina forums. The topic of driveshaft phasing seems to come up from time to time here.

www.mgexp.com

 

[Anon70]

Had a rummage around the web to see what I could find. There seem to be similar discussions on Ford, Polestar, Lucid, Tesla and Kia sites all reporting some front motor noise under varying conditions. Does this mean the issue is common to all electric cars with front motors or are all the noises caused by the same/similar issues?

This website seemed to offer different technical reasons why any electric motor would make different noises

Electric motor noise: How to identify the cause and implement a solution

A methodical approach can narrow down which of the primary sources is to blame: magnetic, mechanical or windage noise.

www.plantservices.com

These are owners of other brands of car who are discussing similar issues...

Tesla

https://teslamotorsclub.com/tmc/threads/front-motor-whining-noise-on-m3-lr-2023.292387/

Kia

AWD front motor whirring noise - now with Audio/Video -...

www.kiaevforums.com

Lucid

RESOLVED - Is motor whine normal?

Brand new owner here. I hear a noticeable howl or whine, rising and falling in pitch as the motor spins up or down. It’s not very loud, but I wonder if it’s normal or an indication of a problem. I never heard anything like it in my Tesla Model S. Am I alone?

lucidowners.com

Polestar

Constant high pitched motor whine, anyone else?

www.polestar-forum.com

Ford

https://www.macheforum.com/site/threads/tsb-23-2168-whine-noise-from-the-front-drive-unit-when-driving-steady-speed-between-30-40-mph-48-64-km-h.28410/

 

[CarbonEV]

Had a rummage around the web to see what I could find. There seem to be similar discussions on Ford, Polestar, Lucid, Tesla and Kia sites all reporting some front motor noise under varying conditions. Does this mean the issue is common to all electric cars with front motors or are all the noises caused by the same/similar issues?

This website seemed to offer different technical reasons why any electric motor would make different noises

Electric motor noise: How to identify the cause and implement a solution

A methodical approach can narrow down which of the primary sources is to blame: magnetic, mechanical or windage noise.

www.plantservices.com

These are owners of other brands of car who are discussing similar issues...

Tesla

https://teslamotorsclub.com/tmc/threads/front-motor-whining-noise-on-m3-lr-2023.292387/

Kia

AWD front motor whirring noise - now with Audio/Video -...

www.kiaevforums.com

Lucid

RESOLVED - Is motor whine normal?

Brand new owner here. I hear a noticeable howl or whine, rising and falling in pitch as the motor spins up or down. It’s not very loud, but I wonder if it’s normal or an indication of a problem. I never heard anything like it in my Tesla Model S. Am I alone?

lucidowners.com

Polestar

Constant high pitched motor whine, anyone else?

www.polestar-forum.com

Ford

https://www.macheforum.com/site/threads/tsb-23-2168-whine-noise-from-the-front-drive-unit-when-driving-steady-speed-between-30-40-mph-48-64-km-h.28410/

I’ve had Tesla Model 3 & Y Performance,

Never had any kind of vibration like the 4.

 

[JustAnotherMidlifeCrisis]

https://www.mgexp.com/forum/mgb-and-gt-forum.1/driveshaft-phasing-and-angle-video.3017205/[/UR

Sorry, was that meant to answer my question?

 

[Chequers]

Sorry, was that meant to answer my question?

Angle of the driveshafts/ UV joints contribute to vibration, also phasing of the two UV joints relative to each other is the biggest contributor of vibration and premature failure.

The splines on a cardon shaft ( Eng name for a splined shaft with UV joints at each end) if not correctly in phase (IE one spline out of its correct place by one spline position will give vibration.
As will too acute angle of the UV joints.
This is Engineering 101, the rear drive shafts already have vibration dampening weights fitted but not the front, maybe ask MG why.

 

[JustAnotherMidlifeCrisis]

I'm still waiting for someone to provide evidence that the implementation of UV joints in the XPower departs from recommended or standard practice. So far all we have is reports of vibration supplemented with speculation.

 

[JonnyG]

Another Australian article here. Seems a bit more specific than previous one :-

MG4 XPower steering issue causes sales halt

MG has halted deliveries of its MG4 XPower as the brand races to address a steering issue with the sporty electric hatch.

www.carsguide.com.au

 

[JustAnotherMidlifeCrisis]

Well cars aren't meant to be driven upside down.

 

[Bricktop X PWR]

Well here's my tuppence worth...
Steering damper?
"Steering issue causes sales halt"
Not really a steering issue is it?

My steering is not compromised in any way, shape or form, by the vibrations I can feel in the steering wheel.

"Australian owners will be offered the fix free of charge"
Very generous of MG Australia to think this way.

That they even had to say that makes me laugh.

"Oh and by the way, Dear Customer, we have delivered to you, a car with an inbuilt manufacturing defect.
Or read "a car not thoroughly developed"
Or " a car rushed into retail to meet our Goodwood demonstration deadline"
Whatever.

I don't buy it.

I can't believe that they didn't know about the issue the first time, the test driver took it out.

I mean, I noticed it the first time I went past about 65mph.

I'm also aware that all you other X Power owners noticed it the same way.

I'm looking forward to hear from an Actual X Power owner (and despite being the first to take ownership of one in the UK??, it won't be me!)
who has had, the "fix" to report back and tell us the issue is completely gone.

If I had an itchy chin emoji, I would definitely use it here!

Oh, and please don't think I'm down on the X Power.
I'm not.
I absolutely love it!

 

[Rolfe]

I merged in a new thread about this issue, to try to keep all the information in the same place. Hope this is acceptable to everyone!

 

[olliewebb]

Interestingly mine was doing this on the way home from collecting it - with about 20 miles on it by the time I got to the motorway. Annoying, almost as annoying as the screen going black when using CarPlay and the blind spot camera coming on at low speed, ended up turning that feature off.

I wonder what other damage it might do if it's shaking stuff all the time.

 

[JonnyG]

Has anyone had a reply from MG yet ?

This made me laugh and angry at the same time in the article :-

Quote :

"MG told CarsGuide the issue was raised by overseas owners and that a fix was being carried out for Australian buyers.

"With help of all the rich insights from customers abroad, we've taken this opportunity to put the new steering damper in all XPowers as part of our Pre Delivery Inspection process both in Australia and NZ"

Seems that we are the overseas guinea pigs but Australians will benefit from it first (for free), not us

 

[Bricktop X PWR]

Has anyone had a reply from MG yet ?

This made me laugh and angry at the same time in the article :-

Quote :

"MG told CarsGuide the issue was raised by overseas owners and that a fix was being carried out for Australian buyers.

"With help of all the rich insights from customers abroad, we've taken this opportunity to put the new steering damper in all XPowers as part of our Pre Delivery Inspection process both in Australia and NZ"

Seems that we are the overseas guinea pigs but Australians will benefit from it first (for free), not us

Made me laugh as well.
I think I've said somewhere on here about being an unpaid (and unappreciated) MG test driver

 

[seamust1000]

Well here's my tuppence worth...
Steering damper?
"Steering issue causes sales halt"
Not really a steering issue is it?

My steering is not compromised in any way, shape or form, by the vibrations I can feel in the steering wheel.

"Australian owners will be offered the fix free of charge"
Very generous of MG Australia to think this way.

That they even had to say that makes me laugh.

"Oh and by the way, Dear Customer, we have delivered to you, a car with an inbuilt manufacturing defect.
Or read "a car not thoroughly developed"
Or " a car rushed into retail to meet our Goodwood demonstration deadline"
Whatever.

I don't buy it.

I can't believe that they didn't know about the issue the first time, the test driver took it out.

I mean, I noticed it the first time I went past about 65mph.

I'm also aware that all you other X Power owners noticed it the same way.

I'm looking forward to hear from an Actual X Power owner (and despite being the first to take ownership of one in the UK??, it won't be me!)
who has had, the "fix" to report back and tell us the issue is completely gone.

If I had an itchy chin emoji, I would definitely use it here!

Oh, and please don't think I'm down on the X Power.
I'm not.
I absolutely love it!

Chin on

 

[seamust1000]

Has anyone had a reply from MG yet ?

This made me laugh and angry at the same time in the article :-

Quote :

"MG told CarsGuide the issue was raised by overseas owners and that a fix was being carried out for Australian buyers.

"With help of all the rich insights from customers abroad, we've taken this opportunity to put the new steering damper in all XPowers as part of our Pre Delivery Inspection process both in Australia and NZ"

Seems that we are the overseas guinea pigs but Australians will benefit from it first (for free), not us

MG Customer Services replied today

Thank you for your email, please speak with the dealership, and then they can talk to our technical team for advice.



If there is a fault present, I am sure it can be resolved.

 

[Bricktop X PWR]

MG Customer Services replied today

Thank you for your email, please speak with the dealership, and then they can talk to our technical team for advice.



If there is a fault present, I am sure it can be resolved.

Helpful.

 

[Bricktop X PWR]

If previous experience is anything to go by, I fully expect a letter from MGUK at some point, asking me to make an appointment at my nearest dealer for the "fix" to be installed.
3 - 6 months I reckon.
Bets please!

 

[Macadoodle]

So SAIC plan to fit a 'steering damper' to resolve this issue ? That does sound like a typical MG response to the problem, cheapest band aid fix rather than addressing the root of the fault.
The vibration must be coming from rotating components, why are they pi$$ing around with the steering ?