SCRUNCH at low speeds?

[Mgkev]

This noise happens to me, usually as it’s telling me I’m about to plough into the rear of the car in front. It’s the electric vacuum pump priming up ready to be used.
If the noise was the gearbox surely it would be constant?

 

[Srp111]

Yep mine makes the same noise when there is an obstacle in front of the car and I am still pressing the accelerator pedal

 

[rbpasapera]

I have noticed a noise when using ACC and in very slow moving traffic. As you get nearer the car in front the car auto brakes and there is a clicking/crunching noise from the front wheels like the ABS being activated. I asked the dealer about it and they contacted MG in the Netherlands and they said this was normal and over time the noise would go away.

It's very noisy but it helps a lot:

 

[Gomev]

Update.. the "gearbox" is being replaced on 22 Dec.. So lets see if that works

I am still intrigued to know which/what gearbox this is.

 

[Paulie68]

I am still intrigued to know which/what gearbox this is.

Although, our cars do not have a traditional gearbox, they do, of course, have a box with one reduction gear and the final drive arrangement to the output shafts. So this is obviously what they are referring to. If there was a manufacturing fault with components in here, they could well make a noise. It would most likely be a constant rather than brief intermittent noise though, so I hope the dealership in question are not wasting everyone's time due to incompetence!

 

[Phil Hayward]

I got the noise today when I was overtaking a cyclist, doing about 20 mph, heard it couple of times before.
Not bothered by the noise.

 

[Mark Holmes]

Although, our cars do not have a traditional gearbox, they do, of course, have a box with one reduction gear and the final drive arrangement to the output shafts. So this is obviously what they are referring to. If there was a manufacturing fault with components in here, they could well make a noise. It would most likely be a constant rather than brief intermittent noise though, so I hope the dealership in question are not wasting everyone's time due to incompetence!

I think they are as we do already no what the noise is, the system is preparing to activate the emergency braking. I have a funny feeling (A few of us have noted the draft on the drivers footwell) well once this has been better insulated with fire resistant wading that you may not be able to hear this noise as much do to increased sound proofing; well that what I hope anyway..

 

[Jasonmgev]

Although, our cars do not have a traditional gearbox, they do, of course, have a box with one reduction gear and the final drive arrangement to the output shafts. So this is obviously what they are referring to. If there was a manufacturing fault with components in here, they could well make a noise. It would most likely be a constant rather than brief intermittent noise though, so I hope the dealership in question are not wasting everyone's time due to incompetence!

Well got a new gear box today ... wow what a total difference .. car drives so much better , no noises , and performance improved.. my sound felt and sounded like a grating sound and all most like the a cog that missing a tooth so it kind of spun then suddenly caught was consistent every time took foot off the accelerator and regen engaged .. well issue seems to be solved for me

 

[Richie]

Well got a new gear box today ... wow what a total difference .. car drives so much better , no noises , and performance improved.. my sound felt and sounded like a grating sound and all most like the a cog that missing a tooth so it kind of spun then suddenly caught was consistent every time took foot off the accelerator and regen engaged .. well issue seems to be solved for me

Well done Jason for sticking with it. Better than breaking down away from home, even with the AA

 

[Siddartha Jajodia Agrawal]

Hi all - wondering if anyone else has experienced this?

In the early days the noise was like that when a brake drum has worn down and you get a loud metal on metal sound - only lasts a second and is intermittent - only seems to happen at low speed (under 17mph) - sometimes when slowly accelerating, sometimes just cruising, sometimes easing off and regen starts to kick in.

Noise has progressed to a quieter scrunch - same symptoms and sometimes the car's speed is clearly momentarily slowed down. Seems to emanate from front right side.

Reported it just before lockdown but only able to get it back to dealer last week - lubricated suspension (?) and returned car.

It happened again today so back the car has gone....

Anyone else had similar issues?

Hi is your problem solved. I am facing same issue. been only a week since i have bought this car.

 

[Mark Holmes]

.

 

[Esi]

Hi
I had same-ish issue and took the car to the dealer and they didn’t find anything wrong.
I was told by someone that it is the auto-break witch senses a crash and physical is getting ready to brake for you.

 

[teepee]

Car went back to dealer in Oct 2020 when they "reconfigured the forward collision system". I would say this marginally improved things - really only made it more predictable when the "scrunch" would happen. As I drive in London a lot there are many obstacles in the streets - cyclists, pedestrians, bollards etc and the car still "scrunches" at them. In March, at the first annual service, I asked the dealer to look again at it and was told - "it's normal for the car - it's just the AEB priming itself". So now I've just learned to live with it and really look forward to trips outside the city on motorways or good open roads where I have no problems at all.

Last week, on a very windy day in London, the car braked for itself and brought the car to a complete stop. There were no cyclists, pedestrians, cars, animals or other obstacles in the street at all. I was doing less than 20 mph with the wife in the passenger seat and she confirmed I was drivng sedately with no possible collision hazards ahead of the car. We can only summise that the wind blew something ( a leaf or similar) across the front radar and that is what caused the car to intervene and brake. If a car had been following me he could easily have ended up crashing into the rear of me.

My last car was a Mazda I'd had from new for 17 years and that of course had no forward detection systems at all - I really am considering ditching this new technology and going back to a good old fashioned banger!!

 

[Subu]

Test

 

[Subu]

New owner here. Just 2 weeks since I got the ZS EV. I drive in Kathmandu traffic so I have much closer car to car distance than probably anywhere else. In just two weeks of driving I can now predict when I'll hear the scrunch sound! Called the dealer yesterday and he said to turn the MG Pilot off. I did. The vehicle still makes the grating sound when approaching another one at around 15km/h just before/while I take my foot off the gas and shift to the brake. My wife sitting next to me starts rambling about returning the the vehicle and claiming we got a lemon.

Today I took it to the dealer and he test drove around to try to hear the scrunch sound with the MG Pilot off... the vehicle decided to stay quiet, I asked the dealer to let me drive and lo and behold the scrunch came back. So the guy turned off the Forward Collidance System and and turned off the MG Pilot and no more scrunchies. The dealer smugly tell me "Sir this vehicle is designed for western countries, in Nepal traffic always turn all sensors off!" Funny thing is, my friend took delivery of the exact same vehicle one week before me and he claims he hears no sound at all crawling around in Kathmandu traffic. Strange!

 

[teepee]

I don't think turning off the sensors is the right way to go about fixing the problem.

 

[Tim Green]

I had the problem today when squeezing between a bus and another car, in centre of three lanes. The ev slowed right down to almost stopped while making scrunching sound, then sped up again after we passed the bus. I suppose it is a safety system so on balance better to have it than not.......

 

[xxnickiexx]

Hi all - wondering if anyone else has experienced this?

In the early days the noise was like that when a brake drum has worn down and you get a loud metal on metal sound - only lasts a second and is intermittent - only seems to happen at low speed (under 17mph) - sometimes when slowly accelerating, sometimes just cruising, sometimes easing off and regen starts to kick in.

Noise has progressed to a quieter scrunch - same symptoms and sometimes the car's speed is clearly momentarily slowed down. Seems to emanate from front right side.

Reported it just before lockdown but only able to get it back to dealer last week - lubricated suspension (?) and returned car.

It happened again today so back the car has gone....

Anyone else had similar issues?

Hi I had a similar expirence, had 4 visits for them to finally recognise it was more than worn pads. My car is still less than 6 months old and has been the workshop for the 5th time. The whole car breaks had to be replaced due to bad rusting and grinding as the problem was getting worse. Each time they tried to blame break dust and said they 'lubricated' latest drama is since they replaced the breaks the other day a new drum noise has started. Never happened but when the car is slowing down between 15-25mph in the rear a drum noise begins. Wonder how many visits this trip will take for them to take ownership the car has a problem they have now caused.... the drama continues.

 

[teepee]

Hi I had a similar expirence, had 4 visits for them to finally recognise it was more than worn pads. My car is still less than 6 months old and has been the workshop for the 5th time. The whole car breaks had to be replaced due to bad rusting and grinding as the problem was getting worse. Each time they tried to blame break dust and said they 'lubricated' latest drama is since they replaced the breaks the other day a new drum noise has started. Never happened but when the car is slowing down between 15-25mph in the rear a drum noise begins. Wonder how many visits this trip will take for them to take ownership the car has a problem they have now caused.... the drama continues.

Several owners have reported similar occurrences. The forward collision sensors spot a potential hazard and respond with either:

1. A warning chime if the car's speed is above a certain level (around 15mph I think - handbook is specific about this somewhere), or
2. The brakes start to prime (this is the scrunching sound heard) in readiness for activating the brakes at low speeds instead of giving the audible warning.

I believe the consensus is that this is "normal for the car". My dealer reconfigured the forward collision sensors and it seemed to improve things for a short while. Until, a few months ago with nothing on the road ahead of me, nor on the oncoming side of the road, nor any pedestrians/cyclists etc, the car activated the brakes and brought the car to a complete stop. I was doing less than 15mph at the time. A few weeks later the brakes activated again in very heavy traffic and a taxi behind nearly shunted me.

Again, the car went in to the dealer who again reconfigured the forward collision sensors, without ever really giving an explanation of why this would happen. So far the car is back to the more predictable scrunch (although not as loud as it originally was) when it spots cyclists or similar in the road ahead.

Hey ho.

 

[Terry2]

I also get a noise when at low speed, but a bit like a chain being dragged. However I get no noises if I turn off the Forward Collison System. I've found that system a bit aggressive, almost making me screech to a halt on occasion with a loud scream coming from the system, eventhough I was in full possession of my faculties! I now tend to turn it off for that reason. It maybe that I'm increasing my risk but it works for me.