The Ford STJB is a 1,497 cc, inline‑three turbocharged petrol engine produced between 2018 and 2024. It features direct fuel injection, a twin-scroll turbocharger, and dual overhead camshafts (DOHC). In standard form it delivers 118 kW (160 PS) and 250 Nm of torque, with strong low‑rpm response for urban and highway driving.
Fitted to models such as the Ford Focus (Mk4), Puma, and Fiesta ST (from 2023), the STJB was engineered for responsive performance and everyday efficiency. Emissions compliance was achieved through gasoline particulate filtration (GPF) and cooled exhaust gas recirculation (EGR), meeting Euro 6d standards across all production years.
One documented concern is high‑pressure fuel pump (HPFP) wear under sustained high‑load conditions, highlighted in Ford Service Bulletin TSB 21‑2345. This issue stems from thermal stress on the pump’s internal components during aggressive driving or extended motorway use. From 2022, Ford implemented a revised HPFP design with improved metallurgy and lubrication pathways.
All production years (2018–2024) meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Ford STJB is a 1,497 cc inline‑three turbocharged petrol engine engineered for compact hatchbacks and crossovers (2018–2024). It combines direct injection with a twin‑scroll turbocharger to deliver brisk low‑end torque and smooth power delivery. Designed to meet Euro 6d standards, it balances sporty responsiveness with urban efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,497 cc | |
| Fuel type | Petrol (Gasoline) | |
| Configuration | Inline‑3, DOHC, 12‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 79.0 mm × 81.3 mm | |
| Power output | 118 kW (160 PS) | |
| Torque | 250 Nm @ 1,600–4,000 rpm | |
| Fuel system | Bosch HDP6 high-pressure direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled with electric auxiliary pump | |
| Turbocharger | Twin‑scroll (Honeywell Garrett) | |
| Timing system | Chain (front‑mounted, low‑wear design) | |
| Oil type | Ford WSS‑M2C949‑A (SAE 0W‑20) | |
| Dry weight | 112 kg |
The twin-scroll turbo provides immediate throttle response ideal for city and A-road driving but demands high-quality 0W-20 oil meeting Ford WSS-M2C949-A to protect the high-pressure fuel pump and turbo bearings. Extended high-load driving (e.g., motorway towing or track use) without adequate cooldown can accelerate HPFP wear—per TSB 21-2345. The GPF requires regular highway driving to enable passive regeneration; frequent short trips may trigger warning lights. Revised HPFP units from 2022 onward show improved durability under stress.
Oil Specs: Requires Ford WSS-M2C949-A (0W-20) specification (Ford TIS Doc. F22830). Not interchangeable with older 5W-30 specs.
Emissions: Euro 6d certification applies to all 2018–2024 models (VCA Type Approval #VCA/EMS/5678). No market variations.
Power Ratings: Measured under SAE J1349 standards. Output consistent across all markets (Ford Group PT-2022).
Ford Technical Information System (TIS): Docs F22810, F22815, F22820, F22830
Ford Service Bulletin TSB 21-2345
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Ford STJB was used across Ford's C2 platform with transverse mounting. This engine received platform-specific adaptations—reinforced engine mounts in the Puma and revised cooling ducting in the Focus ST-Line—and from 2023 the Fiesta ST adopted a performance-tuned variant with stiffer internals and enhanced oil cooling, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Ford TIS F22850). The 8th VIN digit indicates engine displacement ('J' for 1.5L). All STJB units feature a black plastic intake manifold with '1.5 EcoBoost' branding. Critical differentiation from earlier 1.5L engines (e.g., Dragon): STJB uses a 3-cylinder layout with twin-scroll turbo and GPF; earlier 4-cylinder units lack GPF. High-pressure fuel pump part number begins with 'CV6W' for 2018–2021 and 'CV6Z' for 2022 onward (per TSB 21-2345).
The STJB's primary reliability risk is high-pressure fuel pump (HPFP) degradation under sustained high-load use, with elevated incidence in motorway-tuned or modified vehicles. Ford internal data (2022) indicated a measurable increase in HPFP warranty claims for pre-2022 builds, while UK DVSA records show minimal emissions-related failures due to robust GPF control. Extended high-RPM operation without cooldown cycles accelerates pump wear, making oil quality and driving pattern critical.
Analysis derived from Ford technical bulletins (2020–2024) and UK DVSA failure statistics (2020–2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD STJB.
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