MG4 EV Reliability: What UK Buyers Need to Know (2026)

The MG4 EV's reliability record is concerning according to major UK surveys. In the 2024 What Car? Reliability Survey, the MG4 finished last in its category with a reliability score of just 63.8%—significantly below rivals and the EV sector average. Survey data indicates that 37% of MG owners reported their car had gone wrong, with 58% of those vehicles off the road for more than a week. These figures suggest persistent quality issues that potential buyers should consider carefully.

MG4 owners across both UK and Chinese markets report consistent problems with the vehicle's technology systems. Infotainment reliability emerges as a primary concern, with widespread reports of laggy touchscreens, system freezes, and black screens. Bluetooth and Apple CarPlay connectivity issues are particularly prevalent—UK owners report persistent failures that dealers can only address with factory resets. Chinese market data reveals that mid-to-high trim levels lack CarPlay support entirely, contradicting 'smart cockpit' marketing claims.

The MG4's driver assistance systems have attracted official safety scrutiny. Which? magazine identified dangerous flaws in the lane-keep assist system during testing—the car steered towards oncoming traffic when passing on narrow roads. Over 100 owners confirmed similar experiences following publication. The Vehicle Certification Agency (VCA) worked with MG to develop a software update addressing these behaviours, issued in February 2025.

Significant discrepancies exist between the MG4's advertised WLTP range and real-world performance. Owners of the Long Range model report achieving 140-160 miles despite MG's claim of 260 miles. Cold weather further impacts range, with drops of up to 30% reported.

The MG4, sold as the MG Mulan in China, faces substantial quality concerns in its home market. China's authoritative automotive defect platform (车质网/12365auto) recorded 128 complaints in April 2026 alone, ranking the model #10 in the complaint list. Issues span both product quality and sales practices.

MG Motor UK provides a 7-year factory warranty for all models registered from 1 September 2019, which is competitive in the EV market. However, owners should be aware that anti-perforation warranty coverage varies by model (6-7 years) and requires annual inspections at MG dealers.

The MG4's market trajectory tells a cautionary story. In 2024, it was the fourth best-selling EV in the UK with 15,561 units, demonstrating strong initial demand. However, by 2025 the model had dropped out of the top 10 entirely, suggesting that reliability concerns may be affecting consumer confidence.

MG4 owner sentiment is deeply divided. Positive feedback consistently highlights the car's value proposition, styling, and driving dynamics. However, negative experiences are equally vocal, with some owners stating they 'would not go for an MG again' due to tech frustrations and range issues.