UK Signs On to Euro 7, Bringing Battery Health Rules to British EV Buyers

Great Britain will follow the European Union into the Euro 7 era. The Department for Transport has confirmed that all newly registered passenger cars and light commercials sold in the UK must meet the standard from November 2027 — and for the first time, the rulebook reaches well beyond the tailpipe.

Critically, there will be no standalone GB type-approval regime. Existing EU and UNECE approvals will be recognised, so a model approved in Brussels can be sold in Britain without a second round of testing. That spares manufacturers a costly duplicate certification programme.

The Part That Matters for EVs

Euro 7 turns its attention to two areas that have long gone unregulated: particulates that don’t come out of an exhaust, and the condition of the battery pack itself.

• Brake particles: Fixed limits on brake particulate matter are coming. EVs start with an edge here, since regenerative braking does most of the slowing and leaves the friction brakes largely idle.
• Tyre wear: Caps on tyre-derived particulates will be phased in to curb microplastic pollution. Heavier, wider-tyred electric models will feel this most — mass and tread width are the two biggest variables.
• Battery durability: Battery-electric and plug-in hybrid cars must hold at least 80% of original capacity after five years or 100,000 km, and no less than 72% after eight years or 160,000 km.
• State-of-health monitoring: Standardised on-board SOH monitors become mandatory, so buyers can compare pack condition across brands, models and powertrains.

The capacity floor is arguably the biggest shift for the used market. Shoppers have until now had to take a seller’s word on how much range a three- or four-year-old EV had lost. A legal minimum, backed by an on-board readout, gives them something to check.

The numbers that matter: 80% capacity at 5 years / 100,000 km · 72% at 8 years / 160,000 km · applies to BEVs and PHEVs · UK start date November 2027

What Changes for Combustion Cars

Petrol and diesel models aren’t off the hook either. Diesel passenger cars will have their nitrogen oxide ceiling brought into line with petrol engines at 60 mg/km. Emissions compliance must also hold up over ten years or 200,000 km of real-world driving — a far longer durability window than before.

Timelines differ by vehicle class. Trucks and buses get until May 2028 for new types, with all new registrations covered from May 2029. Low-volume manufacturers building fewer than 2,500 vehicles a year have until 1 July 2030.

Vehicles already on the road are unaffected, and low-emission zones such as London’s ULEZ keep their current rules for now.

For UK buyers, the practical takeaway is simple: from late 2027, a new EV will come with a legally enforced battery health guarantee attached. That should make the second-hand market a less risky place — and give dealers a concrete figure to quote instead of a vague estimate.