MG HS Common Problems by Year (2019–present)

✓ Technically reviewed by Daniel Wei Chen — Senior Chinese Automotive Diagnostics & Repair Specialist, Sydney, Australia · 24 October 2026.

MG HS guides: Overview Service schedule Running costs Oil & fluids Problems Recalls (MG)

The MG HS has one Australian safety recall that matters urgently — a fire-risk fault at an electrical ground stud on 2021–2022 plug-in hybrids, with a UK recall of similar description for EHS cars built from 28 July 2020 to 27 October 2022 — and three problem areas owners report most consistently: low-speed hesitation from the dual-clutch gearbox, infotainment freezes, and 12V battery drain. Here is what is officially documented, what is owner-reported, and how to check your own car.

Official recalls — check your VIN first

⚠ PHEV recalls (check your VIN): if you own a 2021–2022 HS Plug-in Hybrid in Australia (the fire-risk recall REC-005652) or a UK EHS built from 28 July 2020 to 27 October 2022 (R/2023/050, an over-heating risk), and have never had recall work done, stop reading and check your VIN now; links below.

Market	Reference	Cars affected	Issue	Fix
Australia	REC-005652 (campaign RMGHSEVPTC)	HS PHEV & +EV 2021–2022 5,168 vehicles	Carpet underlay may be positioned between the nut and the electrical ground stud. If the nut loosens, the wiring beneath the floor could overheat and may cause a fire inside the vehicle. The register’s hazard statement names “injury or death to vehicle occupants, other road users or bystanders”.	Free inspection, and rectification where necessary.
United Kingdom	R/2023/050	HS Plug-in (EHS), built 28 July 2020 to 27 October 2022 3,291 vehicles	The PTC ground wire may not be correctly anchored to the body, with a risk of over-heating. This page has called this fault the same as the Australian recall’s; neither notice says so, and we have not verified it.	The UK file gives the remedy as “Check the insulation and modifying if necessary.”

Correction note: The Australian recall row used to describe the fault in words the notice does not print and to leave out the risk to people that the register states; it now uses the notice’s terms, an electrical ground stud and rectification where necessary, and quotes its hazard. The page gave the recall one 2021–2022 year label for both markets; the UK recall lists EHS cars built from 28 July 2020 to 27 October 2022, and the page now gives each market’s scope, with the UK count. Our statements that this recall and the UK’s R/2023/050 are the same campaign and the same fault are now marked as our reading, and the UK row gives the remedy the UK file prints. We also dated what we found on the two recall registers, and each owner-reported pattern on this page is now labelled as an unverified owner report: we have not verified these patterns, and we hold no copy of their sources.

Sources: Australian Government vehicle recall register (vehiclerecalls.gov.au, REC-005652, May 2023); DVSA recall archive (R/2023/050, March 2023). We read it as the same campaign mirrored in both markets, and as a pattern across MG recalls; neither notice says so, and we have not verified it. Check your own car: vehiclerecalls.gov.au (AU) · gov.uk/check-vehicle-recall (UK). This is high-voltage-adjacent equipment: the fix is dealer-only — do not attempt to inspect or repair the ground-stud connection yourself.

Owner-reported patterns — not recalls, but consistent

1. Low-speed hesitation from the dual-clutch gearbox (petrol & early PHEV)

Unverified owner report: from owner threads on forum.whichmobilitycar.co.uk, complaint records on 12365auto.com and a thread on mgevs.com, as our research notes recorded the reports on 19 August 2026; we have not verified the reports, and we hold no copy of those sources. Those sources report hesitation or clicking from the automatic when pulling away, with a momentary sense of lost torque that returns, and noises when moving slowly and when reversing; the Chinese complaint records also include cases of gearbox oil seepage and of dual-mass flywheel damage, and the mgevs.com thread says the early PHEV’s hesitation was resolved by software in a later phase. Our notes give Chinese dealers’ description of it as characteristic of the dry dual-clutch design, and revised ECU calibrations as reducing it. It is the most consistently reported HS complaint in those sources; we have not measured that comparison. This page has also said that Australian owner reviews report it, that the clutch engagement can feel jerky at crawling speeds, in parking and in stop-start traffic, that the “lost power” sensation returns immediately, and that the flywheel cases are fewer; our notes name no Australian source and record none of the rest.

What to do: if your HS hesitates at low speed, ask the dealer whether a gearbox/ECU calibration update applies to your VIN before accepting “they all do that”. If you’re buying used, test-drive specifically in slow traffic and reverse-parking.

2. Infotainment freezes and lag

Unverified owner report: from forum.whichmobilitycar.co.uk, bumper.co’s MG HS reliability post and autoguide.top, as our research notes recorded the reports on 19 August 2026; we have not verified the reports, and we hold no copy of those sources. Those sources report frozen or slow 10.1-inch touchscreens, Bluetooth drop-outs and sluggish navigation. This page has also said that they are reported across model years in UK and Australian owner communities, and that climate controls route through the screen on many versions; our notes name no Australian source and record neither the model years nor the climate controls. By our reading it is usually an annoyance rather than a fault that strands you: test every screen function on a used car.

3. 12V battery drain (including the current generation)

Unverified owner report: from owner threads on mgevs.com, as our research notes recorded the report on 19 August 2026; we have not verified the report, and we hold no copy of that source. Those threads report the 12V auxiliary battery going flat after the car stands for three days or more, including on current (2025–2026) HS PHEVs, and give one cause: the infotainment backlight failing to switch off when the car is locked. They report that control-unit replacement did not fix it, and our notes give the root cause as software. This page has also said that software updates have been issued progressively; our notes record none of this. If your HS repeatedly wakes to a flat 12V battery, ask the dealer for the latest software rather than just a new battery.

Pattern sources: forum.whichmobilitycar.co.uk (multiple threads); 12365auto.com complaint records (名爵HS — gearbox noise, seepage, flywheel cases); mgevs.com HS/EHS owner forum (gearbox behaviour and 12V drain threads, 2020–2026). Each owner-reported pattern above is labelled as an unverified owner report; we do not republish individual owners’ posts. Brand-level context: in the UK 2022 Driver Power survey, 35% of MG owners reported a fault in the first year — a brand statistic, not HS-specific.

What the HS does not have

When we searched the Australian Government recall register for “MG” on 26 September 2026 (a browser reading, not an archived listing), it listed 12 recalls, and the only HS recall among them was REC-005652. In the copies of the UK recall file we archived on 12 and 26 September 2026, the only HS or EHS recall is R/2023/050. Neither is an engine, brake or airbag recall, and our research notes record no engine-failure pattern for the HS. This page has also said that owner communities generally describe the 1.5T engine itself as robust, and that the recurring complaints cluster around calibration and electronics, not hardware; our notes record nothing on the engine’s robustness, and the owner patterns they record are the gearbox, infotainment and 12V items above.

Buying used — 5-minute checklist

PHEV: confirm that recall REC-005652 (Australia, 2021–2022 cars) or R/2023/050 (UK, EHS built 28 July 2020 to 27 October 2022) was completed (dealer can check by VIN).
Test-drive at crawling speed and in reverse — feel for DCT hesitation beyond what you can live with.
Work every infotainment function, Bluetooth pairing included.
Ask when the 12V battery was last replaced and whether software is current.
Check service history against the official schedule — intervals differ by market.

Disclaimer: Information on this page is general guidance only and does not replace the manufacturer’s official documentation or the judgement of a qualified technician. Intervals, prices and issue patterns change and vary between markets and production years — always confirm with your local MG dealer. Last verified: 19 August 2026 · Next re-check: November 2026.