The annual What Car? Reliability Survey has named MG as the most unreliable brand in the UK, with MINI the most reliable.
It seems that 37% of MGs – up to five years old – suffered a fault, and 58% of those were off the road for more than a week, leading to the survey declaring a 76.9% reliability score
The most unreliable model was the MG 4 with a reliability rating of just 63.8%, with the MG ZS EV not much better at 69.3%, although the MG5 came in with a 92% reliability rating. Coming in as second most unreliable was Alfa Romeo on 84.1% and Vauxhall on 84.7%.
Top 10 Most Unreliable Car Brands in the UK 2024
- MG 76.9%
- Alfa Romeo 84.1%
- Vauxhall 84.7%
- Nissan 85.9%
- Land Rover 87.1%
- Seat 87.5%
- Fiat 88.2%
- Audi 89.0%
- Polestar 89.3%
- Mercedes 89.7%
At the other end of the reliability scale it was MINI coming out #1 with a top score of 98.3%, with its most reliable model the MINI Countryman on 99.7% followed by the MINI Convertible on 99.2%. The MINI Electric was also the most reliable EV. Coming in behind MINI was Lexus on 97.9% and Suzuki on 97.7%.
Top 10 Most Reliable Car Brands in the UK 2024
- Mini 98.3%
- Lexus 97.9%
- Suzuki 97.7%
- Honda 96.6%
- Toyota 96.1%
- Dacia 96.0%
- Citroen 94.1%
- BMW 94.0%
- Renault 93.6%
- Hyundai 93.5%
lisa pearce says
I have the mg4 and from the 1st year onwards it has been the most unreliable pain in my arse! I’m now currently waiting on mg assist to yet again come to get me started as I can’t move the car due to every warning light coming on the dash making me unable to shift out of park! Yesterday I couldn’t even unlock the car no power due to flat battery which I had replaced October 2025 after a module having to be replaced
So here I go again fighting to get mg to look at the car to find the fault again!
Robert bryant says
Just had mg hs trophy only 6 weeks brand new .sat nav never worked mobile phone works just now and then ..plus side very comfortable car solid and seats are really good space and boot excellent.
Mark says
Mg3 avoid. Unreliable and expensive for repairs. 2 years old and clutch needed replaced, £930 to replace. 7 year warranty didn’t cover. Warranty very misleading most things are only covered for 12 months. AVOID
David Clarke says
I purchased the MG ev zs long range back in January this year and have found it to be a good reliable car. The only problem I have is that when you are driving along any road a bleating noise will come on for a time up to a dozen times nothing shows on dash board why it does it it’s quite loud different sound to moving over central lane. Would anyone know of this and have found why it does it
Gopalakrishnan Ramanath says
It is because it is the most unreliable car in the world