A common mistake in transition analysis is assuming industries decline smoothly, in line with falling sales. History shows the opposite.
Internal combustion engine (ICE) supply chains do not fail gradually. They fail non‑linearly, often long before sales approach zero.
This is why the collapse of ICE will accelerate faster than topline sales data suggests — and why the coming shock will feel sudden.
The chart below shows the critical supply‑chain failure zone occurring well before ICE loses majority market share. Once ICE falls below ~70–75% of new‑car sales (circa 2026–2027), supplier economics break, parts availability degrades, and confidence collapses — triggering a non‑linear demand shock.
Volume Is the Oxygen of Manufacturing
Automotive supply chains are built on one assumption: high, predictable volume.
Engines, transmissions, exhaust systems, fuel injection, turbochargers, emissions controls — all rely on:
- Capital‑intensive tooling
- Long amortisation cycles
- Just‑in‑time logistics
- Tier‑2 and Tier‑3 suppliers operating on razor‑thin margins
When volumes fall even modestly, the economics break.
A 10–20% decline in demand does not mean 10–20% stress. It often means existential stress.
The Non‑Linear Collapse Mechanism
ICE supply chains unravel through a cascading process:
- Volumes fall → unit costs rise
- Margins compress → suppliers exit or consolidate
- Parts availability declines → lead times extend
- Warranty and service risk rises → OEM exposure increases
- Residual values fall → financing tightens
- Demand drops further → feedback loop accelerates
This is not theory. It is how complex industrial systems fail.
We’ve seen this pattern before — from photographic film and film‑processing supply chains in the early 2000s to CRT televisions — where production ecosystems collapsed years before end‑user demand reached zero.
EVs Break the Asymmetry
EVs don’t just replace ICE vehicles — they restructure the entire supply graph.
Where ICE relies on thousands of specialised mechanical components, EVs collapse complexity:
- Far fewer moving parts
- Fewer unique suppliers
- Modular platforms
- Software‑defined differentiation
As EV volumes rise, their supply chains simplify and strengthen.
As ICE volumes fall, their supply chains fragment and weaken.
The asymmetry compounds.
The Used Market Is the Canary
One of the earliest signals of supply‑chain stress appears in the used market.
As parts availability becomes uncertain and servicing costs rise:
- Residual values drop faster than new sales
- Financing costs increase
- Insurance premiums rise
- Fleet buyers exit first
This quietly removes a large share of demand — well before consumers consciously “reject” ICE.
Collapse Happens Before Zero
ICE does not need to reach zero sales to collapse.
It only needs to fall below the minimum viable scale required to sustain its supply chain.
That threshold has already been crossed in several markets — and is approaching globally.
This is why the question is no longer if ICE disappears, but how disorderly the unwinding becomes.
For investors, policymakers, insurers, and legacy OEMs, understanding this non‑linear risk — not regulation — is now the critical task.
That’s not sentiment.
That’s industrial math.
That’s Bettrification.