S05.11 · Industrials & Advanced Manufacturing
A ~$2.0-2.2T OE-plus-aftermarket segment where the EV transition is stranding ICE-specific suppliers.
Automotive and transportation components — parts supplied to vehicle OEMs and the aftermarket repair channel — runs roughly $2.0-2.2T combined (2025E) across original equipment (OE) and aftermarket, with the aftermarket alone at $470-500B (2025E, Coherent Market Insights / Precedence Research). The EV transition is the fact that governs everything else in this segment. It is actively stranding suppliers whose product lines are specific to internal combustion — engines, transmissions, exhaust systems — while drawing a parallel and separate boundary between traditional mechanical suppliers and software-defined-vehicle electronics suppliers.
OE growth has run about 3-4% historically, tied directly to vehicle production volume. The aftermarket is the better book: forecast at 5-6% forward, supported by a rising vehicle-parc age — the average US vehicle is now 12.5+ years old — and by growing EV-specific parts content as the electrified fleet ages into its own service cycle. Revenue and production concentrate in China, the US, Germany, Japan and Mexico, the last reflecting nearshored North American supply, with India and Southeast Asia rising as a lower-cost manufacturing base.
Bosch, Denso, ZF, Magna, Aptiv and Continental hold meaningful share of OE content, but the market overall fragments across thousands of Tier 2/3 suppliers, and the aftermarket is more fragmented still. Upstream: steel, semiconductors, and plastics and electronics. Downstream, volume splits between OEM assembly plants and the independent aftermarket repair channel.
The two channels are different businesses and should be read separately. OE runs thin — 5-10% EBITDA, compressed by continuous OEM price-down pressure — while the aftermarket earns 20-30%. The business is capital-intensive on the OE tooling side and highly cyclical with the seasonally adjusted annual rate (SAAR) of vehicle sales; safety and emissions certification requirements gate entry across both channels.
Industrial distribution through the aftermarket channel, electrical equipment through EV power electronics, and precision machining through component supply border the segment. Aftermarket and service revenue is the cushion, insulating suppliers somewhat from OE cyclicality. For ICE suppliers, diversifying into EV powertrain and battery components is the expansionary move — and given the stranding dynamic described above, in many cases an existential one for companies whose legacy product lines are exposed.
Near term, agentic AI compresses the claims-processing labor cost line that OEMs and large Tier 1 suppliers carry, through warranty-claim adjudication and demand forecasting. The more structural effect runs through the OEM-Tier 1 relationship itself: AI-assisted design tools are making it more feasible for OEMs to insource component engineering work that has traditionally been outsourced to Tier 1 suppliers, eroding a decades-old division of labor from the customer side.
The new category boundary running through the segment separates traditional mechanical component suppliers from software-defined-vehicle electronics suppliers, as EV software and electronics content becomes a larger share of vehicle value and mechanical content a smaller one. Claims processing and demand-forecasting automation are already underway. AI-driven design insourcing by OEMs is a longer 5-10 year horizon — a limit set by the organizational inertia of large automakers, not by any technical constraint on the AI tools themselves.