The Ford STJC is a 1,499 cc, inline‑three turbo‑petrol engine produced between 2018 and 2024. It features direct fuel injection, a single twin — scroll turbocharger, and dual overhead camshafts (DOHC). In standard form it delivers 118–140 kW (160–190 PS) with torque figures between 240–270 Nm, enabling brisk urban and motorway performance.
Fitted to models such as the Fiesta ST, Puma ST, and Focus ST‑Line, the STJC was engineered for drivers seeking sporty responsivene…
All production years 2018–2024 meet Euro 6d TEMP or Euro 6d standards depending on registration date .
The Ford STJC is a 1,499 cc inline‑three turbo‑petrol engineered for compact performance hatchbacks and crossovers (2018–2024). It combines direct injection with a twin‑scroll turbocharger to deliver responsive mid‑range power and agile drivability. Designed to meet Euro 6d TEMP and Euro 6d standards, it balances sporty character with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,499 cc | |
Fuel type | Petrol (ULP 95 RON min) | |
Configuration | Inline‑3, DOHC, 12‑valve | |
Aspiration | Turbocharged (twin‑scroll) | |
Bore × stroke | 82.0 mm × 94.3 mm | |
Power output | 118–140 kW (160–190 PS) | |
Torque | 240–270 Nm @ 1,600–4,000 rpm | |
Fuel system | Bosch HDP6 high-pressure direct injection (up to 350 bar) | |
Emissions standard | Euro 6d TEMP (2018–2020); Euro 6d (2021–2024) | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled with dual‑circuit layout | |
Turbocharger | Single twin‑scroll (Honeywell Garrett) | |
Timing system | Chain (front‑mounted; low‑wear design) | |
Oil type | Ford WSS-M2C948-B1 (SAE 0W‑20) | |
Dry weight | 115 kg |
The Ford STJC was used across Ford's B‑Car and C‑Car platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced mounts in the Fiesta ST and revised cooling in the Puma ST—and from 2021 the Focus ST‑Line adopted updated engine calibration and GPF strategies, creating minor ECU 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 STJC is generally robust when maintained properly. Early models (2018–2020) had HPFP concerns, but post-2021 revisions improved durability. Using 95+ RON fuel and correct 0W-20 oil significantly reduces wear. With regular servicing, most STJC engines exceed 200,000 km without major issues.
Key issues include high-pressure fuel pump wear (2018–2020), cylinder deactivation solenoid faults, GPF regeneration failures from short trips, and occasional turbo wastegate rattle. These are documented in Ford SIB 19M04 and TIS updates.
The STJC powers the Fiesta ST (2018–2023), Puma ST (2020–2024), and Focus ST-Line (2019–2024) with 1.5L EcoBoost branding. All are transverse-mounted in B- and C-platform vehicles and feature cylinder deactivation and GPF.
Aftermarket ECU tuning is common on the STJC 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 ST, expect ~7.5 L/100km (city) and ~5.2 L/100km (highway), or ~40 mpg UK combined. Puma ST and Focus ST-Line see slightly higher consumption due to weight. Real-world mixed driving typically yields 38–45 mpg UK.
Yes. The STJC is an interference engine. If the timing chain fails (rare but possible), piston-to-valve contact can cause catastrophic damage. However, the chain is front-mounted and generally durable with proper oil maintenance.
Ford specifies 0W-20 synthetic oil meeting WSS-M2C948-B1. This low-SAPS oil protects the GPF and turbo bearings. Change intervals should not exceed 15,000 km or 12 months, especially with frequent short trips.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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