About MG
MG went from Longbridge sports saloons to one of Britain's best-selling value brands, with the MG4 and ZS everywhere you look. They're great value and packed with kit, though the newer ones are very software-heavy and the older MG Rover cars have their own charming immobiliser quirks.
AutoECU handles MG keys, from the old ZR and TF through to the latest EVs, along with module and electrical diagnostics to keep things running smoothly.
MG models & platform codes
UK-market models we commonly work on, with years and the manufacturer's platform / chassis codes. Can't see yours? Ask us, the list isn't exhaustive.
| Model | Years | Code |
|---|---|---|
| MG4 EV | 2022+ | MG4 (MSP) |
| ZS (petrol / Hybrid+) | 2024+ | ZS Mk2 |
| ZS / ZS EV | 2017-2024 | ZS Mk1 (AS23) |
| HS (incl. PHEV) | 2025+ | HS Mk2 |
| HS (incl. PHEV) | 2019-2025 | HS Mk1 (AS32) |
| MG3 (Hybrid+) | 2024+ | MG3 Mk2 |
| MG3 | 2013-2024 | MG3 Mk1 |
| MG5 EV | 2020+ | MG5 EV |
| S5 EV | 2025+ | S5 EV |
| Cyberster | 2024+ | Cyberster |
| Marvel R | 2021-2023 | Marvel R |
| MG6 | 2011-2016 | MG6 (MG Motor) |
| TF | 2002-2011 | TF (PR3) |
| ZT / ZT-T | 2001-2005 | ZT (R40) |
| ZS (MG Rover) | 2001-2005 | ZS (HH-R) |
| ZR | 2001-2005 | ZR (R3) |
Popular MG coding
- Spare, replacement and all-keys-lost key programming
- Module replacement coding (BCM, ECU, cluster)
- Reversing camera and parking sensor retrofits
- Towbar electrics and trailer settings
- Comfort and lighting settings (model dependent)
- Software updates and fault code clearing after repairs
Common MG electronic repairs
- Immobiliser faults and no-start issues on MG Rover ZR, ZS, ZT and TF
- Remote key fob faults and resyncing issues
- Keyless entry and smart key detection faults on newer MGs
- Infotainment screen and software faults
- 12V battery drain causing electrical faults on EVs and hybrids
- Engine ECU and module communication faults
MG keys & fobs
Transponder key with separate remote
ZR, ZS, ZT, TF (2001-2005)
MG Rover-era keys and remotes; resyncing and replacement are common jobs.
Remote flip key
MG3 Mk1, MG6, ZS Mk1 (early)
Folding blade with remote buttons; buttons and casings wear and can be repaired.
Smart proximity key
MG4, ZS Mk1/Mk2, HS, MG5, MG3 Mk2, S5, Cyberster
Keyless entry and push-button start; newer MGs have tight security, so programming needs specialist equipment.
MG questions
Can you programme a spare key for my MG4 or ZS?
Yes, for many modern MGs we can supply and programme spare smart keys, though very new models can be restricted. Proof of ownership is required. Call AutoECU with your registration and we'll confirm what's possible.
My MG ZR or TF won't start, is it the immobiliser?
On MG Rover-era cars, immobiliser and key remote sync problems are common causes of no-start. Trying the spare key first helps narrow it down. AutoECU can diagnose and repair it.
Why does my MG keep losing its 12V battery?
On MG EVs and hybrids, a weak 12V battery can cause odd electrical warnings and key detection problems. A proper test and module check finds the cause. Get in touch with AutoECU.
Need something done on your MG?
We'll fill in the make for you. Just add your reg and what's wrong.
