Used Electric Car Owners Are Losing Up to £15,000 in Resale Value This Year

• Auto Trader’s August 2026 data shows the average used Audi A6 e-tron Avant has fallen 24.4 percent in a year, a drop of roughly £15,650 on paper.
• The Nissan Ariya recorded the weakest price performance of any car tracked by Auto Trader, down 17.3 percent to an average asking price of £23,419.
• Owners planning to sell or part-exchange one of these models should get a fresh valuation now, as figures from even six months ago are already out of date.

The Cars Losing Value Fastest on the Used Market Right Now

If you bought an Audi A6 e-tron Avant or a Nissan Ariya in the past year, the car on your driveway is worth thousands less than the price you paid, and the gap is widening faster than for almost any other model on sale in Britain. New figures from Auto Trader’s August 2026 market report put hard numbers on a trend that has been building all year: certain electric cars are shedding value at a pace that petrol and diesel equivalents simply are not matching, and the two worst performers are both premium models buyers expected to hold their price.

The average asking price for a used Audi A6 e-tron Avant fell 24.4 percent between August 2025 and August 2026, taking it from roughly £64,160 to £48,509. That works out at a paper loss of about £15,650 in twelve months, on top of whatever depreciation the car had already absorbed after it left the showroom. The Nissan Ariya fared little better, dropping 17.3 percent to an average of £23,419, the single weakest result of any car in Auto Trader’s entire dataset regardless of fuel type.

Who Else Is Affected and by How Much

The pattern extends well beyond those two cars. The BYD Dolphin Surf lost 18.2 percent to an average of £16,190, the BMW i5 fell 15.3 percent to £44,198, and both the Polestar 3 and Polestar 4 dropped by more than 14 percent. Among mainstream family-sized electric cars, the Ford Puma Gen-E and Peugeot E-3008 both lost over 14 percent as well. Genesis, Jaguar and Vauxhall’s electric ranges all appear in the ten steepest fallers, meaning the losses are not confined to one brand or one type of buyer.

Not every electric car is sinking. The Renault Zoe, a small city car long out of production, gained 11.9 percent to £8,895, and the Skoda Enyaq rose 10.5 percent. Older, cheaper electric models with a track record of reliability appear to be holding buyer confidence in a way that newer, larger, more expensive models have not managed. Across the whole market, including petrol and diesel cars, the strongest gainer was the Porsche Boxster, up 20.2 percent to £20,922, followed by the Alfa Romeo Giulia and a clutch of low-volume sports and performance models that have become sought after precisely as they are becoming scarce.

Why the Bigger Electric Cars Are Falling So Fast

Several forces are pulling the price of larger electric cars down at once. Manufacturers have kept discounting new versions of these models to hit sales targets, which drags the value of nearly-new used examples down with them. A steady stream of ex-lease and ex-fleet cars is reaching the used market at the same time, adding to supply just as demand for premium electric cars has cooled. Buyers who might once have paid a premium for the newest battery technology are increasingly waiting for the next model update rather than buying now, which leaves dealers holding stock they need to discount to shift.

There is also a confidence problem specific to bigger, newer electric cars. Battery health and the cost of eventual replacement remain a live concern for used buyers, and warranty cover on the battery pack does not always transfer cleanly between owners on every model. Buyers who are unsure how a battery has been treated, or who cannot get clear evidence of its state of health, will typically only bid on a car if the price already reflects that uncertainty, which pushes average asking prices down further still.

Marc Palmer, head of strategy and insights at Auto Trader, said the wider used car market is showing “real underlying momentum,” with prices broadly stable and sales volumes growing across franchise, independent and supermarket retailers for the first time this year. The average asking price for a used car of any type reached £17,131 in August, down just 0.1 percent year on year, and cars are now selling in an average of 30 days. That overall stability makes the scale of the falls in specific electric models stand out even more sharply.

What to Do if You Own or Are Selling One of These Cars

If you own an Audi A6 e-tron Avant, a Nissan Ariya, a BYD Dolphin Surf or any of the other models named here and you are thinking about selling or part-exchanging, get an up-to-date valuation before you agree a price with a dealer. Auto Trader’s own valuation tool, along with independent sites such as WeBuyAnyCar, updates figures monthly and will reflect the current market rather than a guide price from earlier in the year. A dealer offering you a part-exchange figure based on outdated data can end up costing you hundreds or thousands of pounds without you realising.

If you financed the car on PCP or HP, check your settlement figure against the car’s current trade value before you commit to changing it. Falling used values mean more drivers are finding their outstanding finance balance is higher than the car is now worth, a position known as negative equity. Ask your finance provider for a settlement quote directly rather than relying on the figure printed on your original paperwork, as interest and any missed adjustments can change the balance owed.

Anyone shopping for a used electric car right now is in a stronger negotiating position than they would have been twelve months ago, provided they check a car’s battery health report and service history carefully before agreeing a price. A car that has lost value quickly is not necessarily a bad buy, but it is worth asking a dealer directly why a model has fallen so far and whether that fall is reflected fairly in the asking price.

Auto Trader updates its market data monthly, so anyone with one of the models on this list should expect the figures to keep shifting rather than assume today’s numbers will still apply in the spring. Checking a current valuation before any sale, trade-in or finance decision remains the simplest way to avoid an unwelcome surprise.

How This Fits the Wider Used Car Market

The scale of these falls is striking against a used market that is not behaving this way overall. Overall used car transaction volumes rose 2.6 percent year on year in August, and independent, franchise and supermarket retailers all recorded growth for the first time in 2026. Hybrid models, by contrast, have moved in the opposite direction to premium electric cars over the past year, with buyer demand pushing hybrid depreciation down to around 35.4 percent on average across a full five-year ownership period, a marked improvement on where the category sat two years ago. Mainstream Japanese models such as the Toyota Camry and Honda CR-V continue to hold value more reliably than almost any other class of car, electric or otherwise.

A car losing value quickly as a used purchase can work in a buyer’s favour, as it means a nearly-new example can be bought for meaningfully less than list price. The same fall works against anyone who already owns the car and needs to sell, trade in or settle finance against it. That contrast is relevant for anyone deciding whether to buy new or used right now. Whether the current figures represent a temporary dip driven by oversupply, or the start of a longer-term repricing of larger electric cars on the used market, will depend on how quickly manufacturers slow the pace of new-car discounting that is feeding used values downward.

Checking Battery Health Before You Buy or Sell

Battery health reports are becoming a standard part of buying a used electric car, and several manufacturers now offer a diagnostic check through their dealer network that certifies the battery’s remaining capacity as a percentage of new. Ask for this in writing before agreeing a purchase price, and treat a seller’s reluctance to provide one as a warning sign rather than an oversight. If you are selling, getting a battery health certificate done in advance can help justify your asking price against a market that is currently sceptical of larger electric models, and it gives a buyer a concrete reason to pay closer to your figure rather than assuming the worst about a car they cannot fully assess by eye.

Warranty transfer terms are worth checking too. Some manufacturers transfer the remaining battery warranty automatically to a second or third owner, while others require the car to be registered with an approved dealer network within a set period after a change of ownership to keep the cover valid. Missing that window can leave a buyer with a car that looks warrantied on paper but is not, which is exactly the kind of uncertainty that pushes used buyers toward lower offers on the models currently falling fastest.

Sources:

• Motor Trader: Auto Trader names cars that gained or lost the most value over past year
• Auto Trader plc: News and press releases