Recurring motor fault with MGS5

spicyau

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Location (town/city + country)
Sydney, Australia
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MGS5
Hi all, I'm a new member to this forum - I was inspired to join after seeing how active the discussions around the MG S5 are compared to some of the other social media groups I am a member of.

I wanted to share my experience with a recurring motor fault in my MG S5 (Essence 62kW) that has resulted in the car being towed twice, and being off the road completely for around 7 weeks. I'm based near Sydney, Australia and purchased the S5 in June last year - the first few months it was enjoyable to drive, and as my very first brand-new car (and EV) I took very good care of it to ensure its longevity.

After commuting to work one morning in October (approx 7900km odo), the car lost power after exiting the freeway and displayed a warning message on the cluster "Motor Fault Consult Handbook". The motor was making a strange noise, the car felt reluctant to drive, and it struggled to make it up a short hill to the train station carpark. I also observed that the power indicator on the right hand side of the cluster display stopped showing any information. Here is a photo of the error message displayed on the cluster indicating the fault.

Motor fault.webp


To troubleshoot, I turned the car off, locked it, got back in and turned it back on, but the issue was persistent. I had to get to the office so was unable to troubleshoot further, but I gave MG Roadside Assistance a call to discuss the issue. They advised the error might go away after being left for some time and that if it was still a problem upon returning to the car to give them a call for further instructions. When I returned the fault had disappeared so I started my journey back home. About halfway through the journey after I'd slowed from highway speeds (100kph) down to 50-60kph, the fault reappeared, so I pulled over and called Roadside where they advised the car would need to be towed to a dealership for further investigation.

After a week at the dealership the car was returned to me advising that a software update and recalibration on the motor control units was completed, and they were confident a software bug was the cause of the fault. The car drove normally for the next 3 weeks until the exact same issue reoccurred (approx 9900km odo). Once again the car was towed back to the dealership where it has remained ever since.

Communication from both MG Motor Australia and the local dealerships has been incredibly poor. The technicians have diagnosed the stator (component in the motor) to be faulty, and they have been awaiting delivery of parts for the past 6 weeks. Nobody has been able to provide an ETA on when the parts will be delivered or when the car will be returned to me. Unfortunately in Australia we don't have "lemon laws" for new cars like many other countries do - getting a like-for-like replacement or a refund will take months and require intervention from Consumer Affairs agencies and/or a magistrate - which means I'm stuck trying to push them to complete the repair as soon as possible. Who knows if they've even identified the root cause of the fault correctly, given my experience thus far I'm fully expecting the fault to reoccur once they hand the car back to me!

It's apparent through this forum and other social media channels that this is unlikely to be a widespread fault as I've only come across one of instance of this issue occurring - that person resides on the other side of the country so it really just seems like sheer dumb luck to be handed the keys to one of two known lemons in Australia.

MG Motor Australia have provided me with a courtesy loan car, being a 2023 MG ZS EV (Standard model with 51kW battery), which has been challenging as it doesn't provide me with enough range for my work commute, let alone longer trips to the city or further afield. The charge speed is also quite abysmal compared to the S5, so I've been spending much more time staring at parking lots (and paying for it...) than I would've in my own car.

I'm not sure what I was hoping to get out of making this post - I will do my best to keep it updated with the outcome in the hopes that sharing my experience could assist other future MG S5 owners that may encounter the same rare issue that I have myself. It might also serve as a warning that while MG EVs are quite well regarded, their customer experience leaves a lot to be desired - especially so over here in Australia!
 
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So far, i think the customer service is an area that is severly lacking with MG in general. I guess that, and support/development of their products. Your post just confirms this for me, its bad all over the globe for some reason :D
Also interesting that it seems like they found the issue the first time, but through a recalibration/resync and fw update was enough.. And if there are fw updates for the motors to fix stator issues then why dont they send these OTA to make sure not more people get stranded...
And 6 week+ wait for a vital part is kinda meh.. Hope you get it sorted soon!
 
I have a feeling whatever they did the first time around simply masked the underlying hardware issue, it seems too coincidental that the faults occurred almost exactly 2000km apart.

And yes the wait for parts is incredibly frustrating given how many brand new S5's I can see are in stock at dealerships across the country! My next contact with MG will be to demand they swap the motor with one from another car, or maybe they can just replace the whole car!
 
Followed up with the dealership who advised they're awaiting a "strap" to be delivered (presumably a grounding strap). The part is on backorder and nobody can provide an ETA.

Also, for anyone else who finds this thread via Google, I noticed that MG Australia have recently published a new phone number to contact their head office: 1800 64 8326 (1800 MG TEAM). This is different to the roadside assistance number.
 
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I hope you get it resolved sooner. Nothing worse than bought one brand new and had this issue. I hope we have a "lemon" law that, buyer entitle for a brand new replacement or refund if product is proven to be a "Friday afternoon car" from the factory.
 
Followed up with the dealership who advised they're awaiting a "strap" to be delivered (presumably a grounding strap). The part is on backorder and nobody can provide an ETA.

Also, for anyone else who finds this thread via Google, I noticed that MG Australia have recently published a new phone number to contact their head office: 1800 64 8326 (1800 MG TEAM). This is different to the roadside assistance number.

An earthing strap? surely any competent mechanic could make one in 5 minutes.
 
As an update, after calling the MG Australia direct phone number per my previous comment, I received an email on Friday advising that the replacement parts were due to be dispatched from China on Saturday. They've promised a further update once the parts arrive in Australia sometime this week.

Maybe a coincidence, or perhaps my constant nagging has pushed it along?
 
I hope they can air-freight for you. And parts like this, should have been readily available. Hope you have the good news at the end.
 
As an update, after calling the MG Australia direct phone number per my previous comment, I received an email on Friday advising that the replacement parts were due to be dispatched from China on Saturday. They've promised a further update once the parts arrive in Australia sometime this week.

Maybe a coincidence, or perhaps my constant nagging has pushed it along?
I had a similar experience of the parts being authorised 2 hours after I emailed MG customer service in the UK accusing them of micro-managing the dealer.
 
Whatever gets things moving!

While I'm glad the parts are now inbound, I believe they're going to repair the issue with the stator in the drive motor, rather than replace the motor assembly entirely. Given the misdiagnosis the first time it happened, I'm not confident that they've fully identified the root cause and are merely treating a symptom of a bigger problem in the motor.

Suppose I can't do much about it other than wait and see...
 
In the interest of keeping this thread up to date - on Wednesday I was provided an ETA of "Friday 16th January 2026", though I was not advised if this ETA was for the parts arrival into the country, into an MG warehouse, or to the dealership. In any case I phoned the dealership at 4PM on Friday 16/01, and they advised that they were expecting the delivery this week but it hasn't shown up, and that MG did not provide them with any tracking information. I find it quite strange for a "priority" delivery that tracking info wouldn't be available!

I was also able to confirm that the repair is expected to take a single day's effort once the parts arrive. I'll believe it when I see it!

I've requested an update from MG on the status of the parts delivery and will be following up with a phone call on Monday morning.
 
After 2 months I finally have the Lemon 🍋 back in my possession. 1 week to diagnose, 7 weeks for parts to arrive, 1 day for the repair to be completed. The "STATOR EDU DRV MOT RESOLVER" was replaced, along with some single use parts (bolts, gaskets, straps, seals etc), and they "learned angle offset" (whatever that means).

The car appeared to drive normally for the most part, though maybe it's my hyper awareness but it still felt like the remnants of the low-speed shuddering and audible noise is present.

I also observed odd behaviour on my drive home when accelerating rapidly to a high speed, i.e. when pushing it to 110kph on the motorway at 100% power usage. The car would "slip" repeatedly once reaching approx 103kph - almost like traction control is kicking in and limiting the max power, but no traction lamp is observed when this happens. It will stutter multiple times sequentially and reduces the power output on each occurrence. If accelerating less forcefully it doesn't happen. If it's traction control then fair enough, but I'm concerned it's another symptom of a failing motor and I'd rather not be stranded again!

I'm considering taking it back to the dealership but I'll try taking it for some longer drives over the weekend before I do that.
 
After driving it multiple times over the weekend I'm still concerned about the three new issues (low speed hum, low speed shudder, high speed lurching/loss of power). The dealership will be taking a look at it late next week to see if they can identify the cause. In the meantime fingers crossed it doesn't sh*t the bed mid journey again.
 
Yeah, sounds like there are some unresolved issues there..
 
Hi all, I'm a new member to this forum - I was inspired to join after seeing how active the discussions around the MG S5 are compared to some of the other social media groups I am a member of.

I wanted to share my experience with a recurring motor fault in my MG S5 (Essence 62kW) that has resulted in the car being towed twice, and being off the road completely for around 7 weeks. I'm based near Sydney, Australia and purchased the S5 in June last year - the first few months it was enjoyable to drive, and as my very first brand-new car (and EV) I took very good care of it to ensure its longevity.

After commuting to work one morning in October (approx 7900km odo), the car lost power after exiting the freeway and displayed a warning message on the cluster "Motor Fault Consult Handbook". The motor was making a strange noise, the car felt reluctant to drive, and it struggled to make it up a short hill to the train station carpark. I also observed that the power indicator on the right hand side of the cluster display stopped showing any information. Here is a photo of the error message displayed on the cluster indicating the fault.

View attachment 42406

To troubleshoot, I turned the car off, locked it, got back in and turned it back on, but the issue was persistent. I had to get to the office so was unable to troubleshoot further, but I gave MG Roadside Assistance a call to discuss the issue. They advised the error might go away after being left for some time and that if it was still a problem upon returning to the car to give them a call for further instructions. When I returned the fault had disappeared so I started my journey back home. About halfway through the journey after I'd slowed from highway speeds (100kph) down to 50-60kph, the fault reappeared, so I pulled over and called Roadside where they advised the car would need to be towed to a dealership for further investigation.

After a week at the dealership the car was returned to me advising that a software update and recalibration on the motor control units was completed, and they were confident a software bug was the cause of the fault. The car drove normally for the next 3 weeks until the exact same issue reoccurred (approx 9900km odo). Once again the car was towed back to the dealership where it has remained ever since.

Communication from both MG Motor Australia and the local dealerships has been incredibly poor. The technicians have diagnosed the stator (component in the motor) to be faulty, and they have been awaiting delivery of parts for the past 6 weeks. Nobody has been able to provide an ETA on when the parts will be delivered or when the car will be returned to me. Unfortunately in Australia we don't have "lemon laws" for new cars like many other countries do - getting a like-for-like replacement or a refund will take months and require intervention from Consumer Affairs agencies and/or a magistrate - which means I'm stuck trying to push them to complete the repair as soon as possible. Who knows if they've even identified the root cause of the fault correctly, given my experience thus far I'm fully expecting the fault to reoccur once they hand the car back to me!

It's apparent through this forum and other social media channels that this is unlikely to be a widespread fault as I've only come across one of instance of this issue occurring - that person resides on the other side of the country so it really just seems like sheer dumb luck to be handed the keys to one of two known lemons in Australia.

MG Motor Australia have provided me with a courtesy loan car, being a 2023 MG ZS EV (Standard model with 51kW battery), which has been challenging as it doesn't provide me with enough range for my work commute, let alone longer trips to the city or further afield. The charge speed is also quite abysmal compared to the S5, so I've been spending much more time staring at parking lots (and paying for it...) than I would've in my own car.

I'm not sure what I was hoping to get out of making this post - I will do my best to keep it updated with the outcome in the hopes that sharing my experience could assist other future MG S5 owners that may encounter the same rare issue that I have myself. It might also serve as a warning that while MG EVs are quite well regarded, their customer experience leaves a lot to be desired - especially so over here in Australia!
Hey, I had EXACTLY the same problem, today it appeared again, just coming in to Sydey CBD and the car basically stopped. When I put it into Park, it came back to normal, and the fault was corrected. Last time, it was after a few days without using the car in November and the car would not move at all. When it got towed to the shops, they said that they had no clue what was happening, and the next time they tried to start the car was all back to normal.
 
After driving it multiple times over the weekend I'm still concerned about the three new issues (low speed hum, low speed shudder, high speed lurching/loss of power). The dealership will be taking a look at it late next week to see if they can identify the cause. In the meantime fingers crossed it doesn't sh*t the bed mid journey again.
which dealership are you talking to? Mine is Heartland, and I would love to put them in contact with yours, as I'm having the same issues.
 
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