The Ford ZTJA is a 1,999 cc, inline‑four turbo‑petrol engine produced between 2021 and 2024. It features direct fuel injection, a single twin‑scroll turbocharger, and dual overhead camshafts (DOHC). In standard form it delivers 177 kW (240 PS) and 376 Nm of torque, with strong mid‑range response ideal for performance‑oriented compact SUVs and hatchbacks.
Fitted to models such as the Focus ST, Puma ST, and Kuga ST‑Line, the ZTJA was engineered as a refined evolution of the…
All production years (2021–2024) meet Euro 6d standards .
The Ford ZTJA is a 1,999 cc inline‑four turbo‑petrol engineered for performance compact vehicles (2021–2024). It combines direct injection with a twin‑scroll turbocharger to deliver strong mid‑range torque and crisp throttle response. Designed to meet Euro 6d standards, it balances sporty drivability with stringent emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,999 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 87.5 mm × 83.1 mm | |
Power output | 177 kW (240 PS) | |
Torque | 376 Nm @ 3,000–4,000 rpm | |
Fuel system | Bosch HDP6 high‑pressure direct injection (up to 350 bar) | |
Emissions standard | Euro 6d | |
Compression ratio | 9.5:1 | |
Cooling system | Water‑cooled with electric auxiliary pump | |
Turbocharger | Single twin‑scroll (Honeywell Garrett) | |
Timing system | Chain (front‑mounted; low‑wear design) | |
Oil type | Ford WSS‑M2C949‑A (SAE 5W‑30) | |
Dry weight | 142 kg |
The Ford ZTJA was used across Ford's C‑segment performance platforms with transverse mounting and exclusive to European and global emerging markets. This engine received platform-specific calibrations—enhanced cooling in the Focus ST and revised torque curves in the Puma ST—and from 2023 the Kuga ST‑Line adopted updated engine mounts for NVH refinement, creating minor ECU and hardware 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 ZTJA is generally robust when maintained properly. Early models (2021–2022) had camshaft/HPFP concerns under hard use, but mid-2023+ revisions improved durability. Using 98 RON fuel, adhering to oil change intervals, and avoiding constant short trips greatly enhance longevity. The timing chain is low-wear and typically lasts the engine’s life.
The top issues are HPFP drive lobe wear on the camshaft (early models), GPF clogging in urban use, turbo wastegate rattle, and coolant leaks from the thermostat housing. These are documented in Ford TSBs 24‑0112 and 24‑0715. Most are preventable with proper driving and maintenance habits.
The ZTJA powers the Focus ST (240 PS), Puma ST (detuned 200 PS hybrid variant), and Kuga ST‑Line (240 PS) from 2021–2024. It’s exclusive to European and global markets—not used in North America. All variants feature direct injection and a gasoline particulate filter (GPF).
Aftermarket ECU tuning is common on the ZTJA 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 Focus ST 2.3 EcoBoost 240 PS, expect ~8.2 L/100km (city) and ~5.8 L/100km (highway), or ~42 mpg UK combined. Real-world economy drops significantly with aggressive driving or short urban trips due to GPF regeneration cycles and higher power demands.
Yes. The ZTJA 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 designed for life-of-engine service—no scheduled replacement is required if oil is changed regularly.
Ford specifies SAE 5W‑30 oil meeting WSS‑M2C949‑A (or newer). This low-SAPS oil protects the GPF and turbo bearings. Change every 15,000 km or annually. Using non-approved oil can void warranty and accelerate GPF clogging or turbo wear.
Comprehensive technical documentation and regulatory references
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UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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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.
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