The Ford SEA is a 998 cc, inline‑three turbocharged petrol engine produced between 2015 and 2021. It features direct fuel injection, a single‑scroll turbocharger, and dual overhead camshafts (DOHC). In standard form it delivered 74 kW (100 PS) and 170 Nm of torque, prioritizing urban efficiency with responsive low — end performance.
Fitted to entry — level models such as the Fiesta Mk8, Puma (early base variants), and Ka+, the SEA was engineered for city driving and cost — e…
Production years 2015–2017 meet Euro 6 standards; 2018–2021 models comply with Euro 6b .
The Ford SEA is a 998 cc inline‑three turbocharged petrol engineered for compact city cars (2015–2021). It combines gasoline direct injection with a single‑scroll turbocharger to deliver brisk low-end response and class-leading fuel economy. Designed to meet Euro 6 and Euro 6b emissions standards, it balances urban agility with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 998 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑3, DOHC, 12‑valve | |
Aspiration | Turbocharged (single‑scroll) | |
Bore × stroke | 71.9 mm × 82.0 mm | |
Power output | 74 kW (100 PS) @ 6,000 rpm | |
Torque | 170 Nm @ 1,400–4,500 rpm | |
Fuel system | Bosch HDP5 high‑pressure direct injection (up to 200 bar) | |
Emissions standard | Euro 6 (2015–2017); Euro 6b (2018–2021) | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled with electric auxiliary pump | |
Turbocharger | Honeywell TD025 single‑scroll | |
Timing system | Chain‑driven (front‑mounted) | |
Oil type | Ford WSS‑M2C948‑B1 (SAE 5W‑30) | |
Dry weight | 98 kg |
The Ford SEA was used across Ford's B‑platform derivatives with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Fiesta and simplified cooling routing in the Ka+—and from 2018 the updated tensioner specification created minor service part interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The SEA offers good urban efficiency and generally acceptable reliability, but early models (2015–2017) had timing chain tensioner wear issues. Post-2018 revisions significantly improved durability. With correct oil (5W-30 Ford WSS‑M2C948‑B1) and regular servicing, it can exceed 150,000 km without major issues.
The top issues are timing chain tensioner wear, turbo wastegate sticking, high-pressure fuel pump failure, and coolant leaks from the plastic thermostat housing. All are documented in Ford service bulletins, especially SIB 17S09.
The SEA 1.0L EcoBoost powers the Fiesta Mk8 (2017–2021), Ka+ (2015–2020), and base Puma variants (2019–2021). It is distinct from the naturally aspirated Sigma 1.0L and is not used in commercial vehicles.
Aftermarket ECU tuning is common on the SEA platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In a Fiesta, expect ~5.8 L/100km (city) and ~4.2 L/100km (highway), or about 48 mpg UK combined. Real-world mixed driving typically returns 42–52 mpg (UK), depending on driving style and conditions.
Yes. The SEA is an interference engine. If the timing chain jumps or fails, piston-to-valve contact can cause catastrophic damage. However, the chain is generally robust if maintained with correct oil and timely tensioner updates.
Ford specifies SAE 5W‑30 synthetic oil meeting WSS‑M2C948‑B1 standard. This is critical for timing chain tensioner lubrication and turbo protection. Oil changes every 10,000 km or 12 months are recommended.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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