The Ford FUB is a 1,998 cc, inline-four naturally aspirated petrol engine produced between 2016 and 2021. It was engineered as a fuel-efficient base powerplant for compact and mid-size Ford vehicles, featuring dual overhead camshafts (DOHC), variable cam timing (Ti-VCT), and port fuel injection. In standard calibration, it delivers 103 kW (140 PS) and 187 Nm of torque, optimized for responsive everyday driving and low emissions.
Fitted to models including the Ford Focus (C346) and Ford Mondeo (CD391), the FUB engine was designed for balanced performance and drivability in urban and mixed conditions. It meets Euro 6.1 emissions standards through integrated exhaust manifolds, cooled exhaust gas recirculation (EGR), and a close-coupled three-way catalytic converter, eliminating the need for a gasoline particulate filter (GPF). The engine’s lightweight aluminium construction contributes to improved fuel economy and vehicle handling.
A documented update occurred in 2018 under Ford Service Action 18B10, addressing inconsistent idle quality observed in early production units. The root cause was traced to vacuum fluctuations in the crankcase ventilation system affecting the intake manifold pressure sensor. Ford revised the PCV valve design and updated the ECU calibration to stabilise idle behaviour across ambient temperatures.
Production years 2016–2021 meet Euro 6.1 standards (VCA UK Type Approval #VCA/EMS/6542).
The Ford FUB is a 1,998 cc inline-four petrol engine designed for compact applications (2016–2021). It combines dual overhead camshafts with twin independent variable cam timing (Ti-VCT) to deliver responsive low-RPM performance and stable idle quality. Engineered to meet Euro 6.1 emissions standards, it prioritises fuel efficiency and drivability in everyday conditions.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 82.5 mm × 93.2 mm | |
| Power output | 103 kW (140 PS) @ 6,500 rpm | |
| Torque | 187 Nm @ 4,500 rpm | |
| Fuel system | Sequential port fuel injection | |
| Emissions standard | Euro 6.1 | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Single roller chain (camshaft to crankshaft) | |
| Oil type | Ford WSS-M2C913-C (5W-30) | |
| Dry weight | 136 kg |
The naturally aspirated design provides linear throttle response ideal for city driving but requires adherence to 15,000 km oil change intervals using Ford WSS-M2C913-C (5W-30) to prevent cam lobe and timing chain wear. The Ti-VCT system is sensitive to oil contamination; use of non-approved filters may contribute to phaser sludge. The EGR system requires periodic cleaning to prevent intake manifold carbon buildup, particularly in short-trip applications. Post-2018 models feature revised PCV valves; pre-2018 units should be inspected per Ford SIB 18B10. No gasoline particulate filter (GPF) is fitted, simplifying exhaust servicing.
Oil Specs: Requires Ford WSS-M2C913-C (5W-30) specification (Ford SIB 18B10). Meets Ford's low-SAPS formulation for Ti-VCT protection.
Emissions: Euro 6.1 certification applies to all 2016–2021 models (VCA Type Approval #VCA/EMS/6542). No market-specific variants.
Power Ratings: Measured under SAE J1349 standards. Output consistent across fuel qualities meeting EN 228 (RON 95 minimum).
Ford Technical Information System (TIS): Docs WSA-M4G214, WSAC-M9F134, SIB 18B10
VCA Type Approval Database (VCA/EMS/6542)
SAE International: J1349 Engine Power Certification Standards
The Ford FUB was used across Ford's C346 and CD391 platforms with transverse mounting and no licensed external applications. This engine received platform-specific adaptations-integrated starter-generator in the Focus and enhanced NVH damping in the Mondeo-and from 2018 received updated PCV components per Service Action 18B10, creating interchange limits for crankcase ventilation parts. All adaptations are documented in OEM technical bulletins.
Locate the engine identification tag affixed to the front-facing side of the cylinder block near the transmission bellhousing (Ford TIS WSA-M4G214). The 8th VIN digit indicates engine type ('M' for FUB series). Pre-2018 models have black cam covers with silver Ford badges; post-2018 units use gloss black cam covers with darkened badges. Critical differentiation from EcoBoost engines: FUB has no turbocharger or direct injection components. Service parts require production date verification - PCV valves for engines before 05/2018 are incompatible with later units due to revised flow characteristics (Ford SIB 18B10).
The FUB's primary reliability risk is intake manifold carbon buildup, with elevated incidence in urban-driven applications. Ford internal field reports from 2019 indicated a measurable failure rate in pre-2018 engines used in high-mileage fleet vehicles, while UK DVSA data shows moderate failure rates in private-use Focus applications. Short-trip driving and delayed oil changes increase EGR deposit accumulation, making periodic cleaning and oil quality adherence critical.
Analysis derived from Ford technical bulletins (2016-2021) and UK DVSA failure statistics (2017-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD FUB.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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