MG4 7 year warranty?

the briggie · Mar 17, 2023

I have to assume this applies to LFP as well. (which are more robust)

Lithium Ion High Voltage Battery
During a capacity check at an Authorised MG Repairer if it is determined that the lithium-ion high voltage battery has suffered a capacity drop below 70% of the original value at delivery of your new MG Electric/Hybrid Vehicle, the segment below 70% will be deemed excessive loss. Where possible the excessive loss portion will be repaired, if un-repairable the lithium-ion high voltage battery will be replaced with either a new or a remanufactured battery.

Ayoull · Mar 17, 2023

Rufus2005 said:
hahaha blimey thats grim reading really

Not really look at alot of cars warranty document and you'll see similar from alot of marques

Ayoull · Mar 17, 2023

the briggie said:
I have to assume this applies to LFP as well. (which are more robust)

Lithium Ion High Voltage Battery
During a capacity check at an Authorised MG Repairer if it is determined that the lithium-ion high voltage battery has suffered a capacity drop below 70% of the original value at delivery of your new MG Electric/Hybrid Vehicle, the segment below 70% will be deemed excessive loss. Where possible the excessive loss portion will be repaired, if un-repairable the lithium-ion high voltage battery will be replaced with either a new or a remanufactured battery.

The batteries are modular packs inside that can be replaced unlike Tesla which are rigid and bonded together with intumescent foam

Rufus2005 · Mar 17, 2023

Ayoull said:
Not really look at alot of cars warranty document and you'll see similar from alot of marques

true, at least most of the expensive parts are covered

siteguru · Mar 17, 2023

MG4London said:
This is a good question which is better option for battery life.

Anyway if you can get a entire new battery in the 7th year if it’s dropped under 70%

Maybe you are better off charging the most detrimental way

Given that DC ultra-rapid charging is the most expensive way of doing it ..........

stevegus · Mar 17, 2023

MG4London said:
7 year on the batteries is pretty good isn’t it?

How does that compare with other ev warranties?

There is a bit of a gotcha on the battery warranty.

It’s guaranteed not to fall below 70% of original range for 7 years.

And they will repair it to give at least 70% range.

NOT A NEW BATTERY

So if you take it in with 69% capacity they will repair it and hand it back with 70% minimum

Unless its unrepairable and they can still offer a refurbished replacement- not a new one

Its all here….bottom of page 2

https://www.mg.co.uk/sites/default/files/2021-10/MG_Online_Warranty_Statement_October_2021.pdf

the briggie · Mar 17, 2023

stevegus said:
So if you take it in with 69% capacity they will repair it and hand it back with 70%

I know they don't mention any % figures after repair but is that a fact based on experience, documented fact or a generalisation...not disputing just asking for clarity? The warranty seems to focus on only the segment below 70% indicating the other segments are more healthy. Why put a segment back in that only gets it back to 70% when another valid claim could be submitted within ...days, weeks, months wasting more dealership time and effort...it just doesn't make sense to me but then we are talking MG

As posted above earlier

Lithium Ion High Voltage Battery
During a capacity check at an Authorised MG Repairer if it is determined that the lithium-ion high voltage battery has suffered a capacity drop below 70% of the original value at delivery of your new MG Electric/Hybrid Vehicle, the segment below 70% will be deemed excessive loss. Where possible the excessive loss portion will be repaired, if un-repairable the lithium-ion high voltage battery will be replaced with either a new or a remanufactured battery.

Ayoull · Mar 17, 2023

stevegus said:
There is a bit of a gotcha on the battery warranty.

It’s guaranteed not to fall below 70% of original range for 7 years.

And they will repair it to give at least 70% range.

NOT A NEW BATTERY

So if you take it in with 69% capacity they will repair it and hand it back with 70% minimum

Unless its unrepairable and they can still offer a refurbished replacement- not a new one

Its all here….bottom of page 2

https://www.mg.co.uk/sites/default/files/2021-10/MG_Online_Warranty_Statement_October_2021.pdf

This is common practice, look at Mercedes or Tesla warranty, they all state in a round about way they'll restore the pack to a state that is appropriate for the age of the vehicle.

the briggie · Mar 17, 2023

That I agree but only to 70% is the bit I am shaking my head at...

Why only to the minimum rather than if we give this car 8% we won't see it again until after 7 years

Ayoull · Mar 17, 2023

the briggie said:
That I agree but only to 70% is the bit I am shaking my head at...

Why only to the minimum rather than if we give this car 8% we won't see it again until after 7 years

Exactly the same for all makes, Teslas warrant states verbatim:

"....the replacement Battery will be in a condition
appropriate to the age and mileage of the vehicle sufficient to achieve or exceed the minimum
Battery capacity for the remainder of the warranty period of the original Battery."

Basically we promise to get you out of the warranty no more.

Alb · Mar 17, 2023

It's a long established principle that warranty repairs are not intended to leave you better off than someone who has suffered "acceptable" degradation even if that does sometimes happen.

the briggie · Mar 17, 2023

So they do state "to achieve or exceed" for the remainder of the warranty period" which answers my query

stevegus · Mar 18, 2023

the briggie said:
So they do state "to achieve or exceed" for the remainder of the warranty period" which answers my query

Taking things literally they could do the minimum but i cant see them scientifically calculating the bare minimum to nudge back to 70%

but it does give them leeway to do the bare minimum.

You are not getting a freebie new battery pack like some might imagine.

tsedge · Mar 18, 2023

In practice if the battery has been looked after, it will have a lot more than 70% after 7 years.

Ayoull · Mar 18, 2023

tsedge said:
In practice if the battery has been looked after, it will have a lot more than 70% after 7 years.

Agreed in 99.99% of scenarios but always the possibility you have a weak pack from point of manufacture

TheHypnoToad · Mar 18, 2023

Dan C said:
Basically every manufacturer should be using LFP cells, the only disadvantage is they take up more space compared to a “normal” cell.

There are a few other disadvantages, they weigh more, and also suffer more in lower temps.

tsedge · Mar 18, 2023

TheHypnoToad said:
There are a few other disadvantages, they weigh more, and also suffer more in lower temps.

LFP is good for mass market but NMC wins for performance.

the briggie · Mar 18, 2023

Reading many journals etc. This is the conclusion I have come to as stated earlier

LFP does almost everything better than L-ion. But when it comes to longer/extended range v weight L-ion with all its flaws seems to be the current winner in terms of satisfying current LR expectations from both the motor industry and customers. Tomorrow's technology

bear1 · Mar 18, 2023

AndyL61 said:
I know someone like this. He would probably try to get the washer bottle re-filled.

In the name of honesty, I got a wiper replaced. It had died within a month or so and the attitude of the guy on customer services was so horrendously stupid I want about to accept anything else.
"I can't do anything about warranty claims, you'll have to wait until the warranty guy is in. He knows what to take pictures of."

I suggested we start with photos of the wiper and if that wasn't enough I'd come back. A mention of SADFART and a fair amount of procrastination on his part and he gave in.

Macadoodle · Mar 18, 2023

the briggie said:
Reading many journals etc. This is the conclusion I have come to as stated earlier

LFP does almost everything better than L-ion. But when it comes to longer/extended range v weight L-ion with all its flaws seems to be the current winner in terms of satisfying current LR expectations from both the motor industry and customers. Tomorrow's technology

I think doping LFP with manganese is showing a lot of promise, nominal voltage jumps up above 4v and capacity much improves.
Of course it's the lower voltage range that gives LFP it's reliable old donkey with long life characteristics, so giving the nag a sugar rush might be counterproductive

MG4 7 year warranty?

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