The Ford NX is a 1,388 cc, inline‑four naturally aspirated petrol engine produced between 2005 and 2012. It features a dual overhead camshaft (DOHC) layout with 16 valves and variable cam timing (iVCT), delivering outputs between 60–74 kW (82–100 PS) and torque from 124–128 Nm. Its compact design and lightweight cast‑iron block made it suitable for Ford’s global B‑segment vehicles.
Fitted to models such as the Fiesta (Mk6), Fusion, and Streetka, the NX was engineered for…
All production years (2005–2012) meet Euro 4 standards .
The Ford NX is a 1,388 cc inline‑four naturally aspirated petrol engine engineered for compact and subcompact vehicles (2005–2012). It combines iVCT variable cam timing with a durable cast‑iron block to deliver responsive urban driving and efficient fuel consumption. Designed to meet Euro 4 standards, it balances economy with everyday reliability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,388 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 71.9 mm × 86.0 mm | |
Power output | 60–74 kW (82–100 PS) | |
Torque | 124–128 Nm @ 3,500–4,000 rpm | |
Fuel system | Multi‑point port injection (Bosch ME7.8) | |
Emissions standard | Euro 4 | |
Compression ratio | 10.3:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven DOHC with iVCT | |
Oil type | Ford WSS-M2C913-A (SAE 5W‑30) | |
Dry weight | 98 kg |
The Ford NX was used across Ford's B‑platform vehicles with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised intake manifolds in the Fiesta Mk6 and modified accessory brackets in the Streetka—and from 2009 the updated iVCT solenoid created minor 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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The NX is generally reliable if maintained properly. Early models (2005–2008) are prone to iVCT solenoid issues, but post-2009 revisions resolved this. Regular oil changes with correct 5W-30 spec and timely servicing ensure longevity beyond 180,000 km.
Top issues include iVCT solenoid failure (early engines), timing chain tensioner wear, thermostat housing leaks, and ignition coil fouling. All are documented in Ford service bulletins SSM 39872 and TIS updates.
The NX powered the Fiesta Mk6 (2005–2011), Fusion (2005–2011), and Streetka (2005–2007). All are 1.4L iVCT petrol variants meeting Euro 4 standards throughout production.
Limited potential. The NX responds modestly to ECU remapping (+5–8 kW), but stock internals and cast-iron block limit gains. Cold air intake and exhaust upgrades offer marginal improvements. Aggressive tuning risks reliability due to conservative factory tolerances.
In a Fiesta 1.4 iVCT (80 PS), expect ~7.8 L/100km (city) and ~5.4 L/100km (highway), or ~45 mpg UK combined. Real-world economy depends heavily on driving style, vehicle weight, and maintenance condition.
Yes. The NX is an interference engine. If the timing chain fails (rare but possible), valve-to-piston contact can cause catastrophic damage. However, the chain is robust and typically lasts the engine’s life if oil is maintained.
Ford specifies SAE 5W-30 oil meeting WSS-M2C913-A. Using incorrect oil can impair iVCT operation and accelerate solenoid wear. Change every 15,000 km or annually, whichever comes first.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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