MG 4 Electric 64 kWh

The most commonly reported MG4 issue. The infotainment system can freeze mid-journey, show a black screen, or fail to respond to touch inputs. Apple CarPlay is particularly temperamental, sometimes working only with specific cables or not at all. Bluetooth pairing frequently fails after one journey. Software updates (R46, R67 and later) have improved stability, but many owners still report occasional issues. A reboot (holding the home button) temporarily resolves most freezes. If the head unit fails entirely, replacement costs €200-350 at a dealer. Most issues are software-related and resolved by updates at no cost.

The CCU contains both the AC-to-DC converter (for home/destination charging) and the DC-to-DC converter for the 12V system. Early MG4s with three-phase onboard chargers are most affected. Symptoms start with intermittent AC charging failures and progress to complete inability to charge on AC. MG dealers first attempt a software update, but most cases require a full CCU hardware replacement at approximately €1,500-2,200 including labour. DC charging typically continues to work even with a failed CCU. This is covered under warranty and is also subject to service bulletin SCUK001. Verify completion before purchase.

A widely reported and potentially dangerous issue. The car can apply full emergency braking without any obstruction, particularly when approaching parked cars with oncoming traffic or when driving from light into shadow. Forum threads on MGEVs.com contain hundreds of reports. MG has acknowledged the issue and released software updates (via SCUK001 service campaign updating BCM and FDR modules) that reduce the frequency but do not fully eliminate it. Many owners choose to disable AEB entirely. Setting AEB to alert-only mode prevents the car from braking autonomously but still gives a warning. No direct repair cost, but one owner reported being rear-ended after an unprovoked stop. Software updates are free.

A common issue shared with other Chinese-market EVs. The 12V battery can drain flat if the car is parked for more than 2-3 weeks without driving. The car becomes completely unresponsive - no key fob response, no lights. Parasitic drain from the telematics module and other systems is the main cause. A portable 12V jump starter resolves the immediate issue. Once the car is in the ready state, the HV battery recharges the 12V system. Replacement 12V batteries cost €100-200. A software update improves the HV-to-12V charging behaviour. Owners who park for extended periods should use a trickle charger or disconnect the 12V battery.

The plastic undertray beneath the battery pack is prone to sagging at the front, creating a gap between the tray and the car body. In wet conditions or when driving through puddles, the sagging section can catch and tear off completely. MG issued a service bulletin (AS-TEC-02112023-01) that adds an extra bracket and three bolts to prevent the sag - the fix takes about 10 minutes. This should be covered under warranty. If the undertray has already been damaged or torn off, replacement costs €200-400 for the part plus fitting. Check underneath the car during inspection.

The MG4 uses a self-learning TPMS system that requires reprogramming whenever wheels are swapped or rotated. Many owners encounter persistent TPMS warnings after switching between summer and winter tyres. The system sometimes displays orange dashes instead of pressure values. Dealer reprogramming costs €50-100. Individual sensor replacement costs €80-120 per wheel. Some owners invest in Autel diagnostic tools (approximately €200) to manage sensor codes themselves, which saves on repeated dealer visits. Not a safety issue but an ongoing inconvenience.

Some MG4 owners report the air conditioning or heating system failing intermittently. The compressor may go offline due to a voltage or software fault. In many cases, cycling the system through the iSMART app or performing a system reset resolves the issue. A software update that should have been installed before delivery fixes the most common cases. If the electric compressor itself fails, replacement costs €600-800. Heat pump efficiency can also degrade over time, particularly in cold climates, reducing winter range.