How much less is a 2023 MG4 worth without valid MG warranty?

[LOZ]

Hi all,

I’m after a rough opinion on used values for a 2023 MG4.

I bought one in July 2025 for £14,495 from an Arnold Clark MG branch (with 18k miles), and it was sold to me as having full service history with a manufacturer warranty to 2030, all the sales paperwork also states the manufacturer warranty runs to 2030. On that basis, I had no reason to think otherwise. I’ve since found out the required service wasn’t done in the correct window (No March service in 2024 or 2025 recorded with MG only a July 2025 service with Arnold Clark), so MG say the manufacturer warranty may not actually have been valid when I bought it.

I’m currently taking this up with Arnold Clark to try to get them to put things right, ideally with some form of like for like warranty cover plus compensation for any loss in value/depreciation from the car not actually having valid warranty / proper service history at the time of sale.

What I’m trying to work out is what the car would realistically have been worth back then if it had been known that:

• it didn’t have the proper service history for warranty purposes
• the manufacturer warranty was invalid

As it was only about 2 years old, I’d expect that to have had a noticeable effect on value.

Does anyone have a view on:

• how much less it might have been worth?
• and the best way to evidence that properly?

Thanks

 

[Everest]

Oh no.. not another one

Worth taking a read of this thread - similar issue (though he rejected the MG (not MG4)) - IIRC the OP got estimates for the price of a 3rd party warranty, which is detailed somewhere in the thread. ETA: found it - see postings #33 & #34

T

Thread 'Warranty still valid? - Bought 2022 ZS EV with no proof of first service'

Jan 23, 2025

Hi everyone!

Coming here hoping to get some opinions from others based on their experience with using MG's warranty.

Earlier this week I bought a second-hand 2022 ZS EV from a mains MG dealer. When I first saw and test drove the car, the salesman guaranteed that the vehicle had full service history. I trusted this at face value and (perhaps foolishly) didn't ask to see proof...

The handover day comes and they didn't send any proof of servicing at all with the vehicle. I chase them up on this and suddenly they can only find proof of the latest service (done in Dec. 2024) but not from the...

• tiagoespinha
• 2022 zs ev first service mg zs ev valid warranty zs
• Replies: 83
• Forum: MG ZS EV Forum

 

[Tight Git]

I guess the simple answer is it is impossible to say but possibly not a lot.

When you read all of the exclusions the so called 7 year warranty doesn't actually cover very much. The only real way of knowing is at the point you make a claim and find out, which hopefully never happens.

What would you think is a reasonable outcome?

 

[Alb]

the so called 7 year warranty doesn't actually cover very much

On the contrary, it covers everything not listed as an exclusion and that certainly includes the most expensive parts of the car.

 

[gary333]

On the contrary, it covers everything not listed as an exclusion and that certainly includes the most expensive parts of the car.

Yeah, but they are the parts that are least likely to fail in the first place. It's a duckin' and diving' warranty full of "teeth sucking from the dealers" even when a part in theory should be covered.

 

[OriginalBigAl]

If what you say is true and MG have officially rejected the warranty on the car , then Arnold Clark have mis sold you the product. To put a value on the remaining warranty , even if they pay you a sum of money , lets them off the hook.
They should ( preferably legally written ) offer/ give you the remaining warranty through their head office at the same or better level of guarantee that MG would have provided and also be transferrable to a new owner should you wish to sell. A clause should be included to cover the continuation should AC go bust.
Any compensation due should be for the inconvenience you have had to suffer through their lying.
It of course opens up the possible rejection of the car for a full refund.

 

[siteguru]

Your other remedy is to reject the vehicle as being mis-sold .. Not As Described .. for a full refund less a deduction for reduction in value (usually on the basis of mileage covered - I'd suggest 10p per mile maximum).

The remedy you're currently pursuing is that of a price reduction. (Also covered within the consumer rights act).

Edit: you may also wish to read/watch this thread:

K

Thread 'MG Warranty used buy problem UK'

Saturday at 12:16 PM

Hi all my First post , I purchased a 2yr old mg4 from a dealer who has the MG brand in their network , but not at the branch I bought the car from. I was told the car had been serviced and was eligible for the MG warranty. I have now found out it has never been registered as having been serviced by MG,s records and the 7 year warranty is invalid where do I stand any help greatly appreciated KP

• kpnuts123456
• mg 7 year warranty mg dealer network mg4 service history united kingdom consumer law used car purchase warranty eligibility
• Replies: 4
• Forum: MG4 EV (2022 to 2025) Forum

 

[LOZ]

I guess the simple answer is it is impossible to say but possibly not a lot.

When you read all of the exclusions the so called 7 year warranty doesn't actually cover very much. The only real way of knowing is at the point you make a claim and find out, which hopefully never happens.

What would you think is a reasonable outcome?

Ideally I’d want Arnold Clark to provide a like-for-like warranty covering me until 2030, so I’m in the position I believed I was in when I bought the car, plus some compensation for the difference between what I paid and what the car was actually worth without valid manufacturer warranty / proper service history.

For a 2-year-old car, I’d have thought no proof of the required servicing and no valid manufacturer warranty for the remaining 5 years would knock at least £1,000–£1,500 off the value, possibly more.

I’ve also looked at Warrantywise online and cover seems to come out at around £90 a month just for the next year, with the cost likely rising after that as the car gets older, so there is clearly a real financial value to having proper warranty cover in place.

The other point for me is that I probably wouldn’t have bought it at all if I’d known the manufacturer warranty wasn’t in place. My wife has an MG ZS and MG have had to sort a number of issues on that under warranty, so having proper manufacturer cover was a major factor in my decision to buy this one.

 

[siteguru]

If you're looking for equivalent warranty cover and compensation for reduced value, that could be classed as betterment - something that the CRA doesn't allow for.

 

[M44LCY]

On the contrary, it covers everything not listed as an exclusion and that certainly includes the most expensive parts of the car.

Yes - there should be no problem getting a warranty repair if the drivetrain and battery goes wrong.

For practical purposes, however, there's no warranty on minor items.

My dealer wants £180 "investigation fee" which will be refunded if MG agree the part is covered under warranty. If not I pay that fee PLUS at least one more £180 as the minimum workshop labour charge for the repair. I have had two parts fail within the three year period. One is only an inconvenience and fixing it requires removal of the front bumper - I left it as is. The other cost £35 for the part and half an hour to replace myself. In either case, risking a bill of £360, or the time needed to argue my case, didn't make sense.