Engineers Tore Down a BYD — What They Found Should Terrify Britain's Carmakers
The Sleeper List
6,132 views
In 2023, Japan's largest publishing house bought a BYD Seal, took it apart down to the last bolt, and printed what it found in a 350-page manual priced at around $6,400 a copy — sold to engineers at Toyota, Honda and Nissan. Its preface described BYD as "the Chinese manufacturer that will lead the world of EVs in the future."
That car is in British showrooms now, from a brand that sold 51,422 cars here last year — more than Tesla. So what did the engineers find? And is it cheap to make, or cheap to own? Those are two very different promises.
This video covers what the teardowns actually showed:
Nikkei's engineers found far fewer parts than in rival cars, with eight major components combined into a single drive unit on the Atto 3, and parts shared across multiple models. In October 2024, Japan's government trade bureau laid out over 90,000 parts from 16 foreign EVs in a gymnasium near Nagoya for around 70 Japanese parts makers to study. In Detroit, Caresoft Global — run by a former GM chief engineer with 45 years in the industry — tore down the BYD Seagull (sold here as the Dolphin Surf) and called it a huge problem for American carmakers. And Swiss bank UBS ran its own Seal teardown and found a lasting ~25% cost advantage over Western carmakers, concluding it was "the better and much cheaper car" — while still making roughly a 16% gross margin.
Then the half that reaches your driveway: the blade battery built into the car's structure, and why that can turn a moderate knock into a write-off. Why the Seal sits in insurance groups up to 50. The integrated drive unit, and what nobody yet knows about replacing one out of warranty. BYD's ~125 UK sites and what that means outside the big cities. Used Seals from around £28,495 against £45,730 new.
Plus how BYD started — as a 1995 battery maker in Shenzhen — and the 2003 Japanese study that said China was ten years behind.
Covered honestly too: five Euro NCAP stars, a cobalt-free LFP battery, and one of the best warranties on sale — six years/93,750 miles, and a transferable eight-year/155,350-mile battery warranty.
If you own a BYD — Seal, Sealion, Atto 3 or Dolphin — what has ownership really been like? And if I've got anything wrong, correct me in the comments.
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Engineers Tore Down a BYD — What They Found Should Terrify Britain's Carmakers
The Sleeper List
6,132 views
In 2023, Japan's largest publishing house bought a BYD Seal, took it apart down to the last bolt, and printed what it found in a 350-page manual priced at around $6,400 a copy — sold to engineers at Toyota, Honda and Nissan. Its preface described BYD as "the Chinese manufacturer that will lead the world of EVs in the future."
That car is in British showrooms now, from a brand that sold 51,422 cars here last year — more than Tesla. So what did the engineers find? And is it cheap to make, or cheap to own? Those are two very different promises.
This video covers what the teardowns actually showed:
Nikkei's engineers found far fewer parts than in rival cars, with eight major components combined into a single drive unit on the Atto 3, and parts shared across multiple models. In October 2024, Japan's government trade bureau laid out over 90,000 parts from 16 foreign EVs in a gymnasium near Nagoya for around 70 Japanese parts makers to study. In Detroit, Caresoft Global — run by a former GM chief engineer with 45 years in the industry — tore down the BYD Seagull (sold here as the Dolphin Surf) and called it a huge problem for American carmakers. And Swiss bank UBS ran its own Seal teardown and found a lasting ~25% cost advantage over Western carmakers, concluding it was "the better and much cheaper car" — while still making roughly a 16% gross margin.
Then the half that reaches your driveway: the blade battery built into the car's structure, and why that can turn a moderate knock into a write-off. Why the Seal sits in insurance groups up to 50. The integrated drive unit, and what nobody yet knows about replacing one out of warranty. BYD's ~125 UK sites and what that means outside the big cities. Used Seals from around £28,495 against £45,730 new.
Plus how BYD started — as a 1995 battery maker in Shenzhen — and the 2003 Japanese study that said China was ten years behind.
Covered honestly too: five Euro NCAP stars, a cobalt-free LFP battery, and one of the best warranties on sale — six years/93,750 miles, and a transferable eight-year/155,350-mile battery warranty.
If you own a BYD — Seal, Sealion, Atto 3 or Dolphin — what has ownership really been like? And if I've got anything wrong, correct me in the comments.
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