MG HS Common Problems by Year (2019–present)
The MG HS has one safety recall that matters urgently — a fire-risk fault in the cabin heater earthing of 2021–2022 plug-in hybrids, recalled in both Australia and the UK — 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
| Market | Reference | Cars affected | Issue | Fix |
|---|---|---|---|---|
| Australia | REC-005652 (campaign RMGHSEVPTC) | HS PHEV & +EV 2021–2022 5,168 vehicles | Carpet padding can be trapped between the nut and stud of the cabin (PTC) heater’s electrical earth. The joint can loosen, overheat — and in the worst case cause a vehicle fire. | Free dealer inspection and rework of the earth connection. |
| United Kingdom | R/2023/050 | HS Plug-in (EHS) | Same fault — positioning of the PTC heater earth wire, overheat risk. | Free dealer rework. |
Sources: Australian Government vehicle recall register (vehiclerecalls.gov.au, REC-005652, May 2023); DVSA recall archive (R/2023/050, March 2023). It is the same campaign mirrored in both markets — a pattern we see across MG recalls. 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 heater earthing yourself.
Owner-reported patterns — not recalls, but consistent
1. Low-speed hesitation from the dual-clutch gearbox (petrol & early PHEV)
The most consistently reported HS complaint across UK forums, Australian owner reviews and Chinese complaint platforms: at crawling speeds — pulling away, parking, stop-start traffic — the automatic’s clutch engagement can feel hesitant or jerky, sometimes with a momentary “lost power” sensation that returns immediately. Chinese dealer responses describe it as characteristic of the dry dual-clutch design rather than a component failure; revised ECU calibrations reduce it. Chinese complaint records also include cases of gearbox oil seepage and, in a smaller number of cases, dual-mass flywheel damage. PHEV owners report the early cars showed a similar low-speed hesitation, largely resolved by software in later phases.
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
Frozen or slow 10.1-inch touchscreens, Bluetooth drop-outs and sluggish navigation are reported across model years in UK and Australian owner communities. Usually an annoyance rather than a fault that strands you — but since climate controls route through the screen on many versions, test every screen function on a used car.
3. 12V battery drain (including the current generation)
Multiple independent owner threads report the 12V auxiliary battery going flat after the car stands for a few days — including on current (2025–2026) HS PHEVs. One documented cause: the infotainment backlight failing to switch off when the car is locked. Owners report control-unit replacement did not fix it and the root cause is firmware; software updates have been issued progressively. 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). Patterns are compiled from recurring independent reports — 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
No engine-family recall, no widespread engine failure pattern, and no brake or airbag recall in either market as of the date below. Owner communities generally describe the 1.5T engine itself as robust; the recurring complaints cluster around calibration and electronics, not hardware.
Buying used — 5-minute checklist
- PHEV 2021–2022: confirm recall REC-005652 / R/2023/050 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.