The MG MG4 battery: what it is worth, year by year
MG MG4, since 2022, pack of about 64 kWh. Versions and capacities, manufacturer warranty, expected state of health, possible battery lease and the cost of a failure.
Indicative estimate, excluding diagnosis.
Is this MG4 still under warranty?What is this car’s battery worth?
Remaining warranty, expected state of health, battery lease and cost of a failure. All at once — and nothing you enter leaves your browser.
We check, we don’t certify. The date of first registration is shown in box B of the V5C logbook. The state of health given is a range calculated from the battery’s age, mileage and chemistry: only a measurement on the vehicle gives a figure.
Battery versions of the MG MG4
A model sold over several years does not have the same battery from start to finish, and two versions are often sold side by side. Identify yours: capacity and chemistry change the range, the expected degradation and the cost of a replacement.
- Standard 51 kWh2022 – 202450.8 kWhLFP
battery sold with the car
- Comfort / Luxury 64 kWh2022 – 2024NMC
Two packs were sold under this name: the capacity cannot be deduced from the year and has to be read on the car.
battery sold with the car
- Extended Range 77 kWhsince 2023NMC
Two packs were sold under this name: the capacity cannot be deduced from the year and has to be read on the car.
battery sold with the car
- XPower 64 kWhsince 2023NMC
Two packs were sold under this name: the capacity cannot be deduced from the year and has to be read on the car.
battery sold with the car
- Premium 64 kWhsince 2025LFP
Two packs were sold under this name: the capacity cannot be deduced from the year and has to be read on the car.
battery sold with the car
The expected state of health of a MG MG4 battery
Three model years of this car, at the average French annual mileage of 9,321 miles, each with its chemistry. These ranges describe where a comparable battery usually sits, not yours: use, climate and charging habits spread the fleet widely.
- 2022 model year86 to 96%4 years, 37,282 miles, LFP or NMC depending on the version
- 2024 model year91 to 99%2 years, 18,641 miles, LFP or NMC depending on the version
- 2026 model year98 to 100%under a year, NMC or LFP depending on the version
For model years where two chemistries appear, the range covers both: LFP holds up better over time than nickel, and the gap widens with age. The battery checker will ask for your version to give an estimate that covers yours alone.
For a figure rather than a range, you need a measurement on the car. What state of health means and how it is measured.
What the energy costs per 100 miles
Charged at home, a MG MG4 uses between £6.78 and £9.90 of electricity per 100 miles.
By comparison, a recent petrol car averages 38.7 mpg (7.3 L/100 km) in real-world use: about £19.75 of fuel per 100 miles, at the average price of unleaded petrol (£1.681 per litre on 14 September 2026).
Bottom of the range: the WLTP official consumption, from 3.3 to 3.9 miles/kWh depending on the version. Top: 25% more, the measured gap between official figures and real-world use. Electricity at £0.2632 per kWh, the Ofgem price cap.
Charging at a public charge point: prices vary too much from one operator to another to be given here.
Compare the cost of every modelSources: consumption from the manufacturer or the European registration database; electricity: Ofgem Energy Price Cap, 1 October to 31 December 2026, direct debit, Great Britain average, no VAT (announced 26 August 2026); real-world gap: TNO 2025 and ICCT 2025; petrol: JRC 2025 and weekly road fuel prices from the Department for Energy Security and Net Zero (DESNZ). Checked on 21 September 2026.
Specifications and price ranges given as an order of magnitude, still being confirmed with garages. Only a price given after diagnosis is binding.
The MG MG4 battery
Sold since 2022, with a pack of about 64 kWh.
The MG MG4 pack does not lend itself to module-by-module repair. A diagnosis is still worthwhile: the fault often lies in an ancillary component rather than the pack itself.
Find out what your MG4 is worth
The model, the date of first registration and the mileage are all it takes: remaining warranty, expected state of health, possible battery lease and the cost of a failure. Nothing is sent, the calculation runs in your browser.
Check this MG4