Market evolution: Engine parts (CN 8409) — 2015–2025

Introduction

This report examines the trade dynamics of customs heading 8409 — Parts suitable for use solely or principally with internal combustion piston engine of heading 8407 or 8408 — for the European Union over the period 2015–2025. The heading covers three sub-categories: parts for diesel engines (840999), parts for spark-ignition engines (840991), and parts for aircraft engines (840910). While the internal combustion engine industry faces a long-term structural challenge from electrification, the data reveals that EU trade in these components remained remarkably resilient over the decade — though the nature of that trade changed substantially. Three major dynamics emerge: a price-driven expansion that masked declining volumes, significant shifts in product composition, and a geographic reorientation of both imports and exports that has reshaped the EU's strategic exposure.

1. A Surplus Strengthened by Prices, Not Volumes

The trade surplus widened significantly despite falling physical volumes

Between 2015 and 2025, the EU's trade balance in engine parts grew from €4.51 billion to €5.64 billion, an increase of 25.1%. However, this headline figure conceals a striking divergence between value and volume: export quantities fell by 17.9% (from 728,516 t to 598,388 t) while export values rose by 18.7% (from €10.43 billion to €12.38 billion). On the import side, the pattern was similar — volumes declined 10.5% (from 518,632 t to 464,367 t) while values grew 13.8%.

Unit values rose far faster on the export side

The EU's export unit value climbed 44.5% over the period — from €14,321/t to €20,693/t — while import prices rose a more modest 27.1%. This asymmetry in price growth is the primary engine of the expanding surplus. In effect, the EU has been selling fewer tonnes but at significantly higher prices, while importing at comparatively lower price points. This could reflect a shift toward higher-value-added components on the export side, or a growing premium for EU-manufactured precision parts in global supply chains.

The EU's net exporter position intensified dramatically

The net import reliance ratio plunged from −8.3% in 2015 to −38.7% in 2025 (negative values indicate a net exporter). Concurrently, export propensity surged from 22.0% to 64.0%, and trade intensity rose from 31.8% to 73.5%. These figures indicate that the EU's engine-parts sector became dramatically more outward-oriented: domestic production (which declined from €21.6 billion to €19.5 billion, or −9.7%) was increasingly channelled into export markets, even as total output contracted.

The 2020 COVID shock was a temporary disruption

Trade volumes hit their minimum in 2020 — exports fell to €9.03 billion and imports to €5.28 billion — before rebounding strongly in 2021–2022. Export values peaked at €12.56 billion in 2023 before settling at €12.38 billion in 2025, suggesting a structural plateau rather than renewed momentum.

2. Product Mix Shifts Reflect the Energy Transition

Diesel parts remain dominant but are losing relative ground on the import side

The product segment breakdown reveals that compression-ignition (diesel) parts (840999) remain the largest category in both trade flows, but their share is eroding on the import side. In 2015, diesel parts accounted for 65.1% of import value; by 2025, that share had fallen to 58.6%. Conversely, spark-ignition parts (840991) rose from 34.1% to 40.2% of import value. On the export side, diesel parts increased their share from 64.0% to 67.5%, though this is largely a price effect.

Spark-ignition parts are growing in value despite shrinking volumes

Import volumes for spark-ignition parts (840991) declined from 148,662 t to 138,140 t (−7.1%), yet their value rose from €2.02 billion to €2.71 billion (+34.3%). Import unit values for this segment climbed from €13,587/t to €19,637/t — a 44.5% increase. The same pattern holds on the export side: volumes fell 28.8% (from 242,411 t to 172,574 t) while values edged up 3.5%, implying an export price increase from €15,169/t to €22,059/t (+45.4%). These price dynamics likely reflect both general inflation in manufacturing inputs and a compositional shift toward more complex, higher-value components as simpler parts are increasingly produced closer to end markets.

Aircraft engine parts remain a small but rapidly appreciating niche

The aircraft segment (840910) accounts for less than 2% of trade by value, but it exhibits the most dramatic price trajectory. Export unit values for aircraft engine parts soared from €59,200/t in 2015 to €211,652/t in 2025 — a near-quadrupling — while export values jumped from €79 million to €211 million (+170%). Import values in this niche also grew, from €46 million to €77 million. The extreme unit values reflect the high-precision, low-volume nature of aerospace components, and the surge may be linked to the post-2020 recovery in civil aviation.

EU production contracted while trade openness expanded

The decline in EU domestic production from €21.6 billion to €19.5 billion — a 9.7% drop — stands in contrast to the 18.7% growth in export values. Production peaked at €27.4 billion around 2018 before declining sharply through 2020 and failing to fully recover. This suggests that the internal combustion engine supply chain in Europe is consolidating: fewer, more specialised producers are serving a broader global customer base. The rising export propensity (from 22% to 64%) confirms this structural shift toward outward orientation.

3. Geographic Rebalancing and Strategic Vulnerabilities

China emerged as the EU's fastest-growing import source

Among the EU's top import partners, China stands out with a 172.3% surge in import value — from €491 million to €1,336 million — making it one of the largest absolute gainers. By contrast, traditional suppliers saw more modest changes:

China's rapid ascent is the single most significant geographic shift in imports. Meanwhile, the United Kingdom's decline (−18.7%) likely reflects post-Brexit trade friction, and Brazil's contraction may be linked to shifts in its own automotive production cycles. Import concentration (HHI) rose from 1,130 to 1,280, indicating that import sources became moderately more concentrated — a trend driven in part by China's growing weight.

Emerging markets absorbed the largest export growth

The EU's export geography diversified toward fast-growing economies. Brazil was the standout, with EU export values surging 116.9% (from €336 million to €729 million). India (+80.2%), Mexico (+57.9%), and Türkiye (+38.4%) also posted strong gains. These four markets together added over €1.3 billion in export value, more than offsetting the modest decline in exports to China (−5.1%).

The United Kingdom remained the EU's second-largest export destination and saw a 29.6% increase — potentially reflecting the re-establishment of supply-chain normality after initial Brexit disruption, or the UK's reliance on EU-origin engine parts for its own automotive industry.

Germany anchored the EU's export dominance

At the Member State level, Germany accounted for 38.8% of EU production value and held a revealed comparative advantage (RCA) of 1.83 — by far the highest among large EU economies. German exports of engine parts grew from €5.43 billion to €5.89 billion (+8.6%). The Netherlands showed the most striking export growth (+68.0%, reaching €1.47 billion), likely reflecting its role as a logistics and re-export hub. Italy (+31.7%) and Poland (+24.9%) also strengthened their positions. Among importers, Germany remained the largest (€2.58 billion), followed by Italy (€724 million) and France (€442 million, down 16.7%).

Trade volatility varied sharply by partner

The coefficient of variation (CV) analysis reveals that some bilateral flows were far more unstable than others. Exports to Canada exhibited extreme volatility (CV = 0.97), followed by Russia (0.73) and South Korea (0.46). On the import side, flows from Serbia (CV = 0.41), the United Kingdom (0.36), and China (0.32) were the most erratic. Two notable supply shocks were detected: a price shock in exports to Mexico in 2019 (unit value shift of +54.3%, abnormality score of 47.5) and a price shock in imports from South Africa in 2017 (+42.6%, abnormality score of 23.6). The Mexico shock may reflect USMCA-related supply chain reconfigurations; the South Africa shock could be linked to currency or commodity price fluctuations affecting production costs.

Conclusion

The EU trade in engine parts (CN 8409) over 2015–2025 tells the story of an industry in transition. While the sector remained a strong net exporter — with the surplus growing to €5.6 billion — this performance was driven overwhelmingly by rising unit values rather than expanding volumes. Physical trade quantities declined on both the export and import sides, reflecting the long-term pressures of electrification, shifting powertrain strategies, and a contraction in EU domestic production.

Structurally, the product mix is tilting: spark-ignition parts are gaining import share as diesel's dominance recedes, while the tiny but high-value aircraft segment is experiencing explosive price appreciation. Geographically, China's emergence as a major import source (+172%) and the rapid growth of export ties to Brazil, India, and Türkiye signal a reorientation away from traditional partners. The resulting rise in import concentration warrants monitoring from a supply-chain resilience perspective.

Looking ahead, the sector's ability to sustain its trade surplus will depend on whether the EU can continue to move up the value chain — producing fewer but more specialised and higher-priced components — as global demand for internal combustion engine parts gradually gives way to electric powertrain components.