Replacement Number Plate for MG
This guide covers which finish suits each current MG model, the size and legal spec every MG number plate must meet under BS AU 145e, and when a green flash plate genuinely makes sense. The fact shaping almost every recommendation below: MG's UK range has shifted from mostly petrol to one led by pure electric models, and that changes which finish actually suits the car in front of you.
Which MG Models Need a Replacement Number Plate?
Most MG number plate orders fall into two groups: a genuine replacement after damage or a lost original, or a styling upgrade alongside a private plate change. The current MG range splits into two eras, and it affects the advice below.
On petrol and hybrid: the MG3 and MG3 Hybrid+ are the entry hatchbacks, the MG ZS is a petrol SUV with a reported Hybrid+ variant, and the MG HS is the larger SUV, sold as petrol, Hybrid+ or plug-in hybrid. None of these, including the HS PHEV, are zero-emission.
On pure electric: the MG4 EV (including the quicker XPOWER), the MGS5 EV (which replaced the previous ZS EV), and the two-seat MG Cyberster roadster make up MG's battery-electric range. The MG5 EV estate is being phased out but remains common in the replacement number plate queue, since a discontinued model still needs plates to the same current spec as any new MG.
MG Number Plate Finishes Explained: Standard to Black Diamond
Every finish below is built to the same single UK plate size, 520mm x 111mm, so the choice for an MG is about look, depth and budget, never about fitting a bigger or smaller plate.
The flat Standard number plate at £25 is printed, not raised, the correct choice for a plain, factory-matching MG plate at the lowest cost. The 3D Gel plate at £38 adds a thin domed resin layer, a £13-per-plate step up that reads smarter without much extra depth. The 4D 3mm plate, also £38, swaps resin for genuinely raised gloss acrylic, giving real shadow at the same price. The 4D 5mm plate at £50 is noticeably deeper again. The 4D Gel 3mm plate at £54 combines raised acrylic with a gel coat for extra gloss. The 5D Gel 5mm plate at £64 is the deepest gel finish we offer, and the Black Diamond plate, an introductory £60 (usually £75), is a faceted black-background style for buyers who want the plate to look as deliberate as the rest of the car.
Which Number Plate Finish Suits an MG? (Suitability Table)
| MG Model | Recommended Finish | Why It Suits This MG | Who It's Wrong For |
|---|---|---|---|
| MG3 (petrol) | Standard, or 3D Gel | Entry hatchback bought on value, a plain plate matches its purpose | Anyone wanting a show-plate look, reads oddly against the MG3's budget positioning |
| MG3 Hybrid+ | Standard, or 3D Gel | Same body and buyer as the petrol MG3 | Buyers assuming Hybrid+ means green flash eligibility |
| MG ZS (petrol / Hybrid+) | 4D 3mm | Raised acrylic reads cleanly against the ZS's slab-sided panels | Owners who jet-wash close to the plate weekly |
| MG HS (petrol / Hybrid+ / PHEV) | 4D Gel 3mm, or 4D 5mm | Flagship combustion SUV, a bigger grille suits a deeper gel finish | Buyers wanting a plain look, or assuming the PHEV is zero-emission |
| MG4 EV (and XPOWER) | 4D 5mm, or Black Diamond | Minimal, tech-led design suits a crisp modern finish | Fleet or lease MG4 owners wanting the least conspicuous plate |
| MGS5 EV | 3D Gel, or 4D Gel 3mm | Smoother, badge-like finish suits the rounded EV styling | Buyers wanting the sharpest, most angular look |
| MG Cyberster | 5D Gel 5mm, or Black Diamond | Flagship roadster justifies the deepest finish, matches the low sculpted nose | Anyone choosing purely on cost |
| MG5 EV (discontinued, still common) | Standard, or 3D Gel | Most owners now replace a damaged plate, not style a new purchase | Owners chasing a show-plate look on a model MG no longer markets |
The pattern: entry and practical MGs suit plain or lightly raised finishes, the flagship models carry a deeper finish without looking out of place, and a used MG5 EV is usually a value decision rather than a styling one.
MG Number Plate Sizes and the BS AU 145e Rules, Explained
Every road legal MG number plate we make is built to BS AU 145e: characters 79mm tall, 50mm wide (except 1 and I), a 14mm stroke, 11mm spacing between characters, a 33mm gap before the age identifier, an 11mm margin, white retroreflective at the front and yellow at the rear, solid black characters only, supplier name and postcode marked on the plate. None of this changes by model or finish, it's the baseline every one of our seven styles is built on, from Standard through to Black Diamond.
What changes across the MG range is how that fixed spec sits against each car's design. On the Cyberster's low, sculpted front clip, a raised finish like 4D 5mm or 5D Gel projects into a tighter surround, reading as deliberate against the roadster's sleek lines. On the MG HS, the recess sits within a taller, more upright grille with more space around it, so the same raised acrylic reads as bold rather than tight. Neither is wrong, a deep finish simply suits the Cyberster and the HS more naturally than it suits a plain MG3 runabout, where the character block is identical but the car is asking for less, not more.
Which MG Models Qualify for a Green Flash Number Plate?
A green flash plate is an optional strip only meant for genuinely zero-emission, pure battery electric vehicles. On the current MG range that means the MG4 EV, MG4 XPOWER, MGS5 EV, MG Cyberster and the outgoing MG5 EV all qualify, since all are pure battery electric with no engine at all. See our green number plate guide for the full picture.
The MG3 Hybrid+, the ZS Hybrid+ and every MG HS variant, including the plug-in hybrid, don't qualify, whatever the badge implies. A self-charging hybrid still burns petrol, and a PHEV still carries an engine and a fuel tank, so neither meets the zero-emission bar. Any local low-emission-zone benefit also varies by council and is never a guaranteed saving, worth checking before treating it as a given rather than a possible perk.
Two Real MG Number Plate Buying Scenarios
An MG4 EV owner living inside a city with a low-emission or clean air zone is a genuine green flash candidate, since the MG4 EV is pure electric and qualifies outright. The catch is the actual saving, a discounted permit, free parking, or nothing at all, is set by the local council, not MG or us, so check the specific local scheme first rather than treat it as a promised discount.
A more common scenario: someone has just bought a used, several-year-old petrol MG ZS, the original plate is cracked or the postcode's worn away, and they need a legal replacement fast. There's no styling brief here. A Standard plate at £25 does the job, is fully BS AU 145e compliant, and costs £26 less for the pair than stepping up to 3D Gel, money better spent on the car itself.
Who Shouldn't Buy a 5D Gel or Black Diamond Number Plate for Their MG?
Deep gel and Black Diamond finishes are the wrong call for a specific MG buyer, worth saying plainly rather than upselling everyone. If you drive an MG daily through automated jet washes, park on-street where it gets brushed against kerbs, or simply want the plate to disappear rather than stand out, the deepest finishes are the wrong fit. A 5D Gel or Black Diamond plate on a work-a-day MG3 or a fleet MG4 EV looks mismatched, costs more than the situation calls for, and gives a raised, glossy edge more chances to pick up scuffs. Standard or 3D Gel is the more honest recommendation there, even though it's the cheaper sale.
How to Fit a Number Plate on an MG4 or MG HS
Fitting follows the same core steps on either car, with one model-specific check first. Remove the old plate, noting whether it used screws or sticky pads, most MGs use screws at the front and a mix at the rear. Clean the recess with isopropyl alcohol and let it dry fully, residue left on an MG4's smooth trim or the HS's textured grille weakens pad adhesion within weeks. Offer the new plate up dry first, checking the MG4 and XPOWER's shallower front recess for clearance if fitting a thicker finish like 5D Gel. With screws, drill through the plate's existing fixing holes, not the plate face; with pads, press firmly along the full length, holding for the stated cure time before the car moves. Full steps at the number plate fitting guide.
How to Clean and Care for 3D, 4D and Gel Number Plates on an MG
Raised and gel finishes need slightly more thought than a flat plate, there's more surface and edge exposed. Hand wash with car shampoo and a soft microfibre cloth, working along the character edges rather than scrubbing across them, which dulls the gloss over time. With a jet wash, keep the lance at least 30cm back and avoid pointing it at a raised or gel edge, the pressure that's fine on a flat panel is what lifts a poorly-bonded character. Gel finishes can show slight yellowing under prolonged strong UV over several years, cosmetic ageing rather than a fault, more visible on a light-coloured MG. Wipe the plate dry rather than air-drying with hard water still on it.
Common Mistakes MG Owners Make When Ordering Number Plates
The most frequent mistake is assuming a Hybrid+ badge or a plug-in hybrid means a car is eligible for a green flash, it doesn't, only the MG4 EV, MGS5 EV, Cyberster and MG5 EV are genuinely zero-emission. The second is choosing a deep finish without checking the front recess on a lower-nosed model like the MG4 or Cyberster. The third is guessing at private registration spacing rather than matching the DVLA-issued format exactly, which can fail an ANPR read and an MOT check. The fourth is fitting sticky pads outdoors in winter without full cure time, adhesive bonds more slowly below around 10 degrees, and driving off the same day is why a pad-fitted plate comes loose within weeks.
Are We a DVLA Registered Number Plate Supplier for MG Plates?
No. We are not a DVLA registered supplier. Our plates are built to DVLA's published rules under BS AU 145e. That means every MG plate we make follows the correct character size, spacing, colour and marking set out in the official number plate display rules, without us claiming a registration status we don't hold. That's the standard to check any supplier against, us included.
MG Number Plates: Our Verdict
For most current MG owners, the honest recommendation is 4D 3mm or 4D Gel 3mm, enough depth to look deliberate on a ZS, HS or MG4 without overspending on a daily car. Drive a Cyberster or an XPOWER and want the plate to match the car's intent, 5D Gel or Black Diamond earns its price on those two specifically, we wouldn't push either onto an MG3 or a used ZS bought for value. And if you've just bought a used MG5 EV or MG3 needing a compliant, no-fuss replacement, Standard at £25 is the right call, not a compromise.
Why buy from Legal & Show Plates
We're a Bradford-based online plate maker shipping UK-wide, rated 5.0 on Google from over 300 reviews and 4.6 on Trustpilot. Order before 2pm for same-day dispatch, with a tracked 24-hour Royal Mail option available.
MG Number Plates: Frequently Asked Questions
Q: Are 4D number plates legal on an MG?
Yes, provided the plate is built to BS AU 145e, with the correct character size, spacing, colour and supplier marking. The raised finish doesn't affect legality, it's the underlying spec that has to be right, on any MG.
Q: Which MG models qualify for a green flash number plate?
Only the pure electric models: MG4 EV, MG4 XPOWER, MGS5 EV, MG Cyberster and the outgoing MG5 EV. Any petrol MG, including Hybrid+ and PHEV variants, doesn't qualify, none are zero-emission.
Q: Can I fit a gel number plate on a used MG5 EV?
Yes. Gel finishes fit the same 520mm x 111mm recess as every MG number plate, so a 3D Gel or 4D Gel plate fits an MG5 EV exactly as a current model, the car being discontinued doesn't change the spec.
Q: Is 5D Gel too much for an MG3?
For most MG3 buyers, yes. It's a premium finish that suits a flagship model like the Cyberster far better than an entry hatchback bought on value, where Standard or 3D Gel matches the car's positioning more sensibly.
Q: Do MG number plates need a different size for the Cyberster or the HS?
No. Every UK car number plate is the same 520mm x 111mm size front and rear. What changes between an HS and a Cyberster is only the finish depth that suits the trim, never the plate dimensions.
Q: What's the cheapest legal number plate for an MG?
Our Standard plate at £25. Fully BS AU 145e compliant, flat rather than raised, and right for a plain, factory-matching replacement rather than a styling upgrade.
Q: Are you a DVLA registered number plate supplier for MG plates?
No. We're not part of the DVLA's formal supplier registration scheme, and we don't claim to be. Every MG plate we make instead follows DVLA's published BS AU 145e rules on size, spacing, colour and marking, which is the standard that actually determines whether a plate is road legal.
Q: How long do 4D or gel number plates last on an MG?
With reasonable care, hand washing where possible and jet-wash distance kept to at least 30cm, a raised or gel finish should look sharp for several years. Gel can show mild UV yellowing over a long period, cosmetic ageing rather than a defect, more visible on lighter-coloured MGs.
