The Ford YLFA is a 1,499 cc, inline‑three turbocharged petrol engine produced between 2018 and 2023. It features a dual overhead camshaft (DOHC) layout with 12 valves and direct fuel injection. In standard form it delivered 118 kW (160 PS) and 250 Nm of torque, offering brisk urban performance and refined mid‑range response.
Fitted to models such as the Ford Focus Mk4, Puma, and Fiesta ST (2023+), the YLFA was engineered for responsive drivability with low emissions and str…
All production years (2018–2023) meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/9876).
The Ford YLFA is a 1,499 cc inline‑three turbocharged petrol engine engineered for compact hatchbacks and crossovers (2018–2023). It combines DOHC architecture with direct fuel injection and a low-inertia turbocharger to deliver responsive low-end torque and smooth power delivery. Designed to meet Euro 6d emissions standards, it balances performance with environmental compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,499 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑3, DOHC, 12‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 75.0 mm × 85.0 mm | |
Power output | 118 kW (160 PS) @ 6,000 rpm | |
Torque | 250 Nm @ 1,600–4,000 rpm | |
Fuel system | High-pressure direct injection (Bosch HDEV6) | |
Emissions standard | Euro 6d | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single low-inertia turbo (Honeywell) | |
Timing system | Chain (maintenance‑free design) | |
Oil type | Ford WSS-M2C945-A1 (SAE 0W‑20) | |
Dry weight | 102 kg |
The Ford YLFA was used across Ford's C2 and B2E platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced mounts in the Puma and revised exhaust manifolding in the Focus Mk4—and from late 2021 the Fiesta ST adopted a higher-output calibration with unique cam profiles, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The YLFA's primary reliability risk is carbon buildup on intake valves due to its direct-injection design, with elevated incidence in high-mileage or short-trip urban use. Ford internal data from 2022 indicated up to 12% of pre-2021 engines required intake cleaning before 80,000 km, while UK DVSA MOT records show GPF-related warnings as a growing cause of advisory notes. Extended oil intervals and low-quality fuel accelerate deposit formation, making correct maintenance critical.
Analysis derived from Ford technical bulletins (2018–2023) and UK DVSA failure statistics (2020–2025). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The YLFA is generally robust if maintained properly, but direct injection leads to carbon buildup on intake valves over time. Post-2021 models benefit from improved EGR strategies that reduce deposits. Using correct 0W-20 Ford-spec oil and avoiding constant short trips greatly extends engine life. Many examples exceed 150,000 km with no major issues.
Top issues include intake valve carbon fouling, GPF clogging, high-pressure fuel pump wear, and turbo wastegate sticking. Carbon buildup is the most prevalent and is addressed in Ford TSB 21‑06‑14. Regular oil changes, quality fuel, and proper driving cycles help prevent most problems.
The YLFA powers the Ford Focus Mk4 (1.5 EcoBoost), Puma (1.5 EcoBoost and MHEV), and the 2023 Fiesta ST (200 PS variant). It was exclusive to European and global markets and not sold in North America. All applications are transverse-mounted in front-wheel-drive or MHEV layouts.
Yes. ECU remapping typically yields +20–30 kW on standard variants, limited by the GPF and stock internals. The Fiesta ST version is already tuned to 200 PS. Forced induction upgrades are unnecessary—the turbo is efficient, but supporting mods (intercooler, exhaust) are recommended for stage 2+ tuning.
In a Ford Focus 1.5 EcoBoost, expect ~6.8 L/100km (city) and ~4.9 L/100km (highway), or about 48 mpg UK combined. Real-world mixed driving typically returns 42–50 mpg (UK). Economy suffers with aggressive driving or frequent short trips due to GPF regeneration demands.
Yes. The YLFA is an interference design. If the timing chain fails (rare but possible), pistons can contact open valves, causing catastrophic damage. However, the chain is designed to last the engine’s lifetime if oil is changed regularly with correct specification.
Ford specifies SAE 0W‑20 oil meeting WSS-M2C945-A1 (or newer) standard. This ensures proper turbo and chain protection and supports GPF compatibility. Always use a quality synthetic oil and change every 15,000 km or 12 months, whichever comes first.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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