What have MG3 owners raised?
Locks. A 2019 MG3's central locking kept releasing by itself. CarsGuide's answer pointed to a glitch in the body computer (the module that runs the locks and lights). If yours does this, have it scanned, and treat it as a security issue until it's fixed.
Wind noise. A 2022 Core owner had whistling near the windows, and the answer pointed to door seals from a bad batch or doors out of alignment. On a car under warranty, that's one for MG.
If you've got something else, such as a warning light or a noise, what an engine light means or noises from a car are good places to start.
Which MG3 do you have?
The third-generation MG3 launched here on 12 June 2024, with a 1.5-litre petrol or a 1.5-litre Hybrid+. An entry Vibe with the petrol followed in May 2025. Earlier MG3s here are the second generation.
A Hybrid+ adds a high-voltage battery and motor. Routine servicing is still mostly oil, filters, brakes and tyres, but the high-voltage side is for a mechanic trained on it, and the engine won't always be doing what you expect. Say which you have when you tell us the car.
MG3 service schedule and what moves the bill
MG suggests every 12 months or 10,000 km on the 2024 car, the same gap CarExpert listed for earlier MG3s in 2021. Whichever comes first applies, so a low-kilometre MG3 still needs its yearly visit. Your Service and Warranty Booklet has the final word.
We don't list prices, because the workshop and what's due change the answer. What moves an MG3 service is the item list at your kilometres, the oil the book asks for, and any wear found along the way, such as pads, tyres or wiper blades. Ask for that list in writing before work starts. Our guide to what's in a car service can help you read it.
The warranty, if you don't use a dealer
MG's rules for cars first registered from 1 July 2025 are unusually clear. Standard cover is 7 years with unlimited kilometres, and a suitably qualified Australian repairer can do the servicing. The record has to reach MG's online portal within 10 days of the service date, with the kilometres, the work done and a copy of the job card.
Extended cover, up to 10 years or 250,000 km, needs every service done at an MG dealer. So an independent service keeps the standard warranty and gives up the extended one. Older MG3s go by their own booklet.
Tell us it's an MG3, the year, and whether it's a Hybrid+. A local mechanic who specialises in your car.
What you can do on an MG3
You can
- Top up washer fluid and check tyre pressures when cold
- Note whether the locks misbehave with the key, the button or by themselves
- Check the door seals for tears or lifted rubber
- Keep each service record in one place
Leave to the mechanic
- Scanning the body computer
- Door and seal adjustment
- Uploading or supplying what MG's portal requires
- Any Hybrid+ high-voltage work
What we'd do with an MG3
Decide on the warranty before the first service, not after. If you want the extended years on a newer MG3, stay with an MG dealer for every visit. If you'd rather use a local mechanic, that's a fair choice: ask before the work who will upload the record to MG's portal within the 10 days, and keep your own copy of the job card.