Mg4 Software Update Instant
Managing software updates for the MG4 can be a bit of a process, especially since many updates are currently dealer-installed rather than over-the-air (OTA). I've put together this "paper" or guide to help you navigate the update process, covering what’s available, how to get them, and common issues they solve. MG4 Software Update Guide 1. Key Updates & Known Bulletins
While MG doesn't always provide a public "changelog," several critical updates have been identified by owners and technical departments:
AEB (Automatic Emergency Braking): A major update (Bulletin # AS-TEC-07022024-01) was released around February 2024 to address "phantom braking" issues where the car would brake unexpectedly.
HVAC (Climate Control): Updates have been released to fix issues where the air conditioning would blow ice-cold air even when set to a warm temperature (e.g., 24°C). mg4 software update
Infotainment & App Connectivity: Various patches address bugs where the MG iSmart app fails to trigger climate pre-conditioning or displays incorrect vehicle status.
Safety Systems: Updates often improve Lane Keep Assist (LKA) and Forward Vision Camera performance (speed sign recognition). 2. How to Get Your Updates
Unlike many modern EVs, the MG4 rarely receives full system updates over-the-air. You generally need to visit a dealership. Managing software updates for the MG4 can be
The "Specific Complaint" Rule: Many dealers now only perform updates if you report a specific problem. If you just ask for "all updates," they may decline.
Tip: If you want the latest software, mention issues like "phantom braking" or "erratic lane keeping" to trigger the relevant bulletin.
Service Intervals: It is best to request a software check during your scheduled maintenance. Issue: Rapid DC charging speeds dropped in cold
Cost: Updates related to safety or manufacturing faults (like the AEB issue) should be covered under warranty at no charge. Some dealers have reportedly tried to charge hourly rates ($140/hr), but this is typically contested by owners as warranty work. 3. Self-Service Options (Maps & Navigation) You can sometimes handle the SatNav/Maps update yourself:
Tools Needed: A 64GB high-quality USB flash drive (formatted to exFAT) and a computer.
Process: Download the Navigation Updater App from the official MG portal (if available in your region), load the files onto the USB, and plug it into the left-hand USB-C port (the data port) in the car.
3.4. Battery Preconditioning (XPower & Extended Range)
- Issue: Rapid DC charging speeds dropped in cold weather (max 40-50 kW instead of 140+ kW).
- Fix: BMS update enables manual battery preconditioning via navigation (set a DC charger as destination). Result: Peak charge rate 140 kW achievable in 10°C (50°F) conditions.
Prerequisites:
- The car must be in Park (P).
- The parking brake must be engaged.
- High voltage battery above 20% (preferably 50%).
- A stable 2.4GHz Wi-Fi connection (5GHz struggles with MG’s antenna).
Key Benefits of Updating:
- Lane Keep Assist (LKA) Fixes: Early MG4 models had aggressive LKA that would "tug" the wheel near highway exits. Recent updates have softened the torque application.
- Infotainment Responsiveness: Older software causes lag when switching between HVAC controls and navigation.
- Battery Heating (LFP Models): Specific updates enable manual battery preconditioning for faster DC rapid charging in cold weather.
- The "Rear Seat Belt" Nanny: Updates allow you to disable the persistent seatbelt alarm for rear seats when carrying heavy shopping.
- HVAC Logic: Fixes issues where the heater blows cold air on the passenger side but hot on the driver side.