MG4X previewed in China — MG S5 facelift joins MG4 family with semi-solid-state battery and up to 610 km CLTC

MG has expanded its MG4 line-up in China with the MG4X, a C-segment SUV derived from the existing S5 that is being offered with the company’s semi-solid-state battery technology alongside conventional LFP packs. Chinese paperwork and manufacturer releases describe two battery options, multiple power outputs and CLTC-range claims up to 610 km. International rollout plans are signalled for Europe later in 2026 and a Malaysia introduction is discussed by local media for 2027, but regional specifications, testing standards and timing differ and are not yet identical across markets.

What is the MG4X and where was it launched?

The MG4X is a higher-riding, C-segment SUV variant that joins the MG4 family. According to coverage of MG’s China activities, the car is effectively a facelifted MG S5 (also referenced as ES5 in China) rebadged to sit within the MG4 naming convention and was launched in China in June 2026 with rear-wheel drive only for the initial line-up. Local Chinese pricing was reported as ranging from 99,800 to 116,800 yuan.

Launch type: global reveal, regional introduction or facelift?

Sources describe the MG4X as a China-market launch and a repositioned/renamed version of the existing S5. The model is a regional introduction in China and a facelifted S5 in terms of body, rather than an entirely new global model. MG has communicated plans to introduce the semi-solid-state battery technology to Europe by the end of 2026, but that relates to the MG4 Urban model in Europe and not a confirmed simultaneous global MG4X reveal.

Powertrain and performance

In China the MG4X is offered with single-motor rear-wheel-drive configurations. Reported motor outputs vary by battery / trim: semi-solid-state variants are said to deliver 170 PS (125 kW) and 250 Nm, while LFP-equipped variants are quoted at 204 PS (150 kW) and 350 Nm — the latter figures match the Malaysian-spec CKD MG S5 as reported. Some early media reports and filings list a base rear motor of 125 kW and a higher-output 150 kW option. MG has not published a full global performance sheet for the MG4X across markets.

Battery, range and charging (electrified models)

Two battery chemistries and sizes are reported for China:

• A 53.9–53.95 kWh manganese-based semi-solid-state pack (MG branding calls it SolidCore/Semi-solid-state). Reported CLTC range: roughly 510 km (316 miles) for that battery in MG4X filings and press reports.
• A larger 64.2 kWh CATL-supplied LFP pack delivering up to 610 km CLTC.

Charging and thermal claims differ between the two chemistries in the available coverage. Reported peak DC charging for LFP variants is higher (reported at 150 kW) than for semi-solid-state variants (reported at 120 kW) in some China-focused coverage. DC 30–80% times were cited as approximately 16 minutes for the faster LFP-equipped versions and 25 minutes for the semi-solid-state variants — these figures reflect Chinese-cycle labelling and vendor testing and may not translate directly to WLTP or EPA numbers.

Publishers covering MG’s semi-solid-state batteries state the cells reduce liquid electrolyte content to about 5%, which the manufacturer and testers say improves thermal stability and resistance to thermal runaway in abuse tests. MG’s claims — reported in industry outlets — include no smoke, fires or explosions during needle-penetration tests and longer cycle life, but independent laboratory confirmation is not included in the material reviewed here.

Dimensions and practicality

The MG4X’s footprint closely mirrors the S5/ES5. Sources report the MG4X measures roughly 4,500 mm long, 1,849 mm wide and 1,621 mm tall, with a 2,735 mm wheelbase — slightly longer and taller than MG’s hatchback MG4 variants. That places it in the C-segment compact SUV class, with external dimensions comparable to cars such as the BYD Atto 3 / Yuan Plus family (market-dependent). Interior packaging is described as carrying over much of the S5’s layout and passenger space, including typical C-segment practicality features.

Interior and technology

The MG4X’s cabin in China retains the S5’s dashboard architecture, including a large central touchscreen. Reported equipment highlights include a 15.6-inch central display with 2.5K resolution and a separate driver cluster in Chinese-market variants, and an intelligent cockpit developed with Oppo. Overseas-market versions are expected to receive smaller centre screens in some markets to allow for physical HVAC and audio controls where customers prefer them. Optional features reported for local-spec cars include heated/ventilated and massaging front seats and a panoramic roof.

Safety and driver assistance

Chinese-market examples are said to include higher levels of automated highway driving technology using systems from Horizon Robotics, consistent with MG’s recent feature sets across models. Detailed safety specification lists, standard safety suites and tested Euro NCAP / IIHS / NHTSA results for the MG4X are not part of the available material and would require regional confirmation once the car is homologated locally.

Trims, regional price and availability

China: The MG4X launched in China in June 2026 with prices reported at 99,800–116,800 yuan. Filings and local media describe rear-wheel-drive single-motor configurations only at launch, with semi-solid-state and LFP battery versions priced within that bracket.

Europe (including UK): MG has confirmed it will introduce its semi-solid-state battery technology to Europe by the end of 2026, initially in the MG4 Urban (the hatchback variant). Coverage suggests the MG4 Urban will be offered in the UK late in 2026, but there is no official, matched confirmation that the MG4X SUV will be sold across Europe at that same time. WLTP range estimates are expected to be lower than CLTC: reporting on the MG4 Urban suggests Chinese CLTC figures of around 510–528 km could translate to roughly 400–450 km WLTP for comparable battery sizes.

Malaysia: Malaysian media commentary has discussed the facelifted S5 / MG4X and linked it to a possible Malaysian introduction in 2027. MG’s Malaysian priorities reportedly still focus on other models (e.g., ZS Hybrid+ and IM6) and there is no manufacturer confirmation of a Malaysia launch date or local specification for the MG4X. The Malaysian-spec CKD S5 (current generation) was referenced as having comparable power outputs to the LFP MG4X variants.

Market-specific differences and cautions

Do not mix range standards: CLTC ranges reported (up to 610 km) are China cycle figures and will be higher than WLTP or EPA values. Sources repeatedly warn that expected WLTP figures could be roughly 420–500 km for the two battery sizes cited, while EPA numbers (for the United States) are unreported and would likely be lower still if the model reaches that market. Reported charging peaks and 30–80% times come from manufacturer or local test claims in China and should be treated as manufacturer-provided figures until independently validated under the applicable regional standard.

How the MG4X compares with direct rivals

Positioning: The MG4X targets the compact EV SUV segment in China and competes with models such as the BYD Atto 3 (Yuan Plus/Atto family) and other small crossover EVs with similar wheelbase and overall length. Its distinguishing technical claim is MG’s semi-solid-state battery option at a comparatively modest battery capacity (around 54 kWh) but with CLTC range competitiveness and manufacturer-stated safety/thermal advantages.

Relative advantages and trade-offs: Compared with LFP alternatives, MG’s semi-solid-state pack is marketed for improved thermal stability and safety; however, available reports indicate the larger LFP pack yields higher CLTC range and faster peak DC charging rates in the MG4X’s current Chinese configuration. That means buyers choosing the semi-solid-state chemistry are reportedly selecting perceived safety and thermal benefits over outright range or faster charging in the present generation.

What to watch next — timeline and practical implications

1. China: MG4X sales were reported to begin in China in mid-2026; local retail availability and specification details should be confirmed via MG China press materials and dealer price lists for exact trim content.
2. Europe/UK: MG’s semi-solid-state-equipped MG4 Urban is scheduled to arrive in Europe by the end of 2026; whether the MG4X SUV joins that initial European rollout is not confirmed in the available coverage and would require an MG Motor Europe announcement.
3. Malaysia and other Southeast Asian markets: Local reporting links the MG4X/S5 facelift to potential introductions in 2027, but no official local launch dates or pricing for Malaysia have been announced by MG.

For buyers and fleet planners outside China, it is important to separate the China CLTC claims from WLTP and EPA expectations and to wait for region-specific homologation and third-party test results for range, charge speeds and safety. The semi-solid-state chemistry is notable as a Chinese-led step toward safer, lower-liquid-content cells in volume EVs; its practical benefits and trade-offs versus existing LFP packs will become clearer only after more independent testing and broader, multi-market deployment.