11 MG HS Problems You Should Be Aware Of Before Buying!

Gustavoblalmiras

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MG HS owners have reported electrical system malfunctions, such as intermittent faults in the infotainment system, malfunctioning sensors, and warning lights. If you’re considering an MG HS (petrol or PHEV), it’s smart to know what can go wrong before you put money down—especially because many issues show up as “software-y” annoyances that are easy to miss on a quick test drive.

The good news: MG’s strong value-for-money reputation and long warranty can soften the blow. The not-so-good news: owner satisfaction and reliability feedback has been mixed, with electrical issues commonly mentioned.

Below are 11 real-world MG HS problems (plus what symptoms look like and how to check for them).

Quick context: which MG HS are we talking about?

“MG HS” can refer to:

  • Earlier HS (commonly seen 2020–2024 in many markets)
  • Newer second-generation HS (arrived later, with updated tech and a big-battery PHEV option in some regions)

Some issues below are more common on earlier cars, but even newer cars can show similar “electrical/ADAS/infotainment” quirks.

1) Infotainment glitches, freezing screens, slow response

This is the headline complaint for many owners: screens that freeze, lag, reboot, or just feel inconsistent day to day. It’s not always a hard “failure”—often it’s software stability and integration (phone connectivity, navigation, audio, camera views) that causes frustration.

What to look for

  • Random reboots or black screen
  • Touch input lag (tap… wait… then it reacts)
  • Bluetooth/CarPlay/Android Auto dropping out

Buying check

  • During a test drive, connect your phone, use maps, switch audio sources, open the reverse camera, and change vehicle settings through menus.
  • Ask the seller/dealer if the car has had software updates.

2) Mystery warning lights & sensor “false alarms”

A common theme in reliability writeups is that electrical faults are a frequent category for owners—and when they happen, the car may throw multiple warnings at once (even if the root cause is small).

What to look for

  • TPMS/ABS/ESC warnings that appear then disappear
  • Driver-assistance alerts that come up in clear weather
  • Parking sensor “blocked” messages when nothing is blocking it

Buying check

  • Start the car from cold and see if warnings appear on startup.
  • Turn steering lock-to-lock slowly in a car park; watch if alerts pop up.
  • If warning lights are present, don’t accept “it just does that”—get diagnostics.

3) Overly annoying driver-assistance bongs and alerts

Even when systems work properly, some reviewers dislike how constant the alerts can be, and how fiddly they are to disable through the touchscreen. That can be more than an annoyance: it can become a distraction.

What to look for

  • Driver attention warnings that trigger too easily
  • Lane/assist alerts that feel overprotective for your driving style

Buying check

  • On the test drive, use a typical route (dual carriageway + town + country road if possible).
  • Check whether settings “stick” after restarting the car, and how quickly you can adjust them.

4) Jerky low-speed auto behaviour (DCT models)

On some petrol automatic HS versions, owners have reported jerky gear changes, especially at low speeds (pulling away, creeping in traffic, parking manoeuvres). This is often described as a dual-clutch transmission (DCT) “lurch” or hesitation.

What to look for

  • Shudder/hesitation at 5–20 mph
  • Unpredictable take-up when you gently press the accelerator
  • Clunky 1st–2nd shifts in stop-start traffic

Buying check

  • Do a slow crawl in traffic (or simulate it in a quiet car park).
  • Try gentle throttle inputs—not just hard acceleration.

5) PHEV “flat spot” / shift lag around 45–50 mph

Some HS PHEV drivers describe a noticeable power pause or “hole” around the mid-speed shift point, sometimes paired with a jerk that feels like a misfire (even if it isn’t).

Why it matters

  • It can be annoying in daily driving.
  • It can feel unsafe if it happens while overtaking.

Buying check (PHEV)

  • In a safe setting, gently accelerate through 40–55 mph and see if it hesitates.
  • Repeat in different modes (EV/Auto/Hybrid) if the car offers them.

6) PHEV charging that stops early or won’t start

Owners have reported scenarios where the HS PHEV appears connected to a charger but doesn’t actually charge, or stops after a short time—sometimes after a dealer visit or software work.

What to look for

  • Charge estimate stuck on a very long time remaining
  • Charger reports “connected” but power draw is near zero
  • Only charges reliably on one cable/one charger type

Buying check

  • If you’re buying a PHEV, ask to see it charge (even for 10–15 minutes).
  • Confirm it charges on your intended setup (home wallbox vs granny cable).

7) 12V battery drain (and weird electronics when voltage drops)

A weak or draining 12V battery can trigger a cascade of symptoms: infotainment acting up, random warnings, and unreliable start/ready behaviour. Reports of 12V battery drain have been noted by reliability guides discussing common HS complaints.

What to look for

  • Car struggling after sitting a few days
  • Multiple warnings that disappear after driving
  • Stop/start or “ready” behaviour becoming inconsistent

Buying check

  • If the car has been standing, insist on a cold start.
  • Ask for proof of battery replacement if the seller claims it was an issue.

8) Fire-risk recall (HS PHEV / HS +EV in some markets)

This one is serious: a recall affecting certain MG HS PHEV / HS +EV vehicles (2021–2022 in Australia) warned that a manufacturing defect could lead to wiring overheating and a potential fire. The recall advises owners to contact a dealer for inspection and rectification.

Buying check

  • Always run a recall check for your country/region (or ask a dealer to confirm completion). In the UK, GOV.UK provides a recall checker service.
  • Ask for paperwork showing recall work has been completed.

9) DAB/radio module headaches (and “fixes” that create new annoyances)

Some HS owners have complained about DAB/radio behaviour and head-unit quirks. In UK-focused community discussions, a “permanent fix” via MG dealers is mentioned, but some owners say certain fixes can be clunky (for example, affecting USB availability).

Buying check

  • Test FM/DAB reception in a few areas.
  • Check USB ports and audio stability (no dropouts).
  • If the seller mentions a DAB update/fix, ask exactly what was done and when.

10) Water ingress & leaking panoramic sunroof drains

Leaking sunroofs have been cited as a known complaint on older cars by reviewers, and owners have reported cases where blocked sunroof drains led to water in footwells.

What to look for

  • Damp smell, misting windows, wet carpets
  • Water staining near A-pillars or headliner edges
  • Rust spots under mats (if it’s been bad)

Buying check

  • Lift mats and feel the carpet in front and rear.
  • Inspect headliner edges around the sunroof.
  • After heavy rain, re-check (or ask for photos/video evidence if buying remotely).

11) HVAC faults: no heat / no A/C (especially painful on PHEV)

Some owners have reported heater and A/C failures requiring parts like a PTC heater or a high-voltage A/C compressor—plus delays if parts aren’t readily available.

Buying check

  • Run the heater to full hot for several minutes: confirm it actually gets warm.
  • Run A/C on a mild day: confirm the air goes genuinely cold and stays cold.
  • Check for any warning messages related to climate control.

Smart “before you buy” checklist (fast but effective)

On the driveway (10 minutes)

  • Cold start, watch for warning lights
  • Test infotainment: phone pairing + camera + menus
  • Heater + A/C test
  • Check carpets for damp (especially sunroof cars)

On the road (20–30 minutes)

  • Stop-start crawl for gearbox jerkiness
  • 40–55 mph acceleration (PHEV hesitation test)
  • Listen for interior rattles over rough surfaces
  • Watch for driver-assistance nags/alerts

Paperwork

  • Recall completion proof (or dealer confirmation)
  • Warranty status (MG UK lists HS under its 7-year coverage structure; battery warranty terms can differ)
  • Service history and software update notes

Are MG HS cars “bad”? Not necessarily.

The MG HS can be a lot of car for the money, and safety ratings/equipment can be strong. But the ownership experience often comes down to whether you get a car with stable software, healthy 12V electrics, and all updates/recalls completed.

If you want the lowest-risk purchase:

  • Prefer a car with documented dealer servicing
  • Avoid examples showing recurring warning lights
  • For PHEVs, only buy once you’ve seen it charge reliably

Sources & further reading

  • MG HS reliability/satisfaction context (Driver Power, electrical faults, safety notes)
  • Carwow MG HS reliability notes + common complaints mention (sunroof leaks, brittle plastics, electrical glitches)
  • Common problems roundup (infotainment, jerky DCT, creaks, 12V drain)
  • Official recall notice (MG HS PHEV / HS +EV fire risk – Australia)
  • UK recall checking guidance (GOV.UK)
  • Owner-reported PHEV charging / driveline hesitation threads (community reports)

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