The Ford MX is a 1,999 cc, inline-four naturally aspirated petrol engine produced between 2015 and 2018. It forms part of Ford's Sigma engine family, featuring dual independent variable cam timing (Ti-VCT), multi-point fuel injection, and an aluminium block and head. In standard tune, it delivers 103 kW (140 PS) and 188 Nm of torque, providing linear power delivery and strong mid-range response for mainstream passenger applications.
Fitted to models including the Mondeo (Mk4), S-Max, and Galaxy, the MX engine was engineered for balanced performance and refinement in mid-size Ford vehicles. Its driving character emphasizes smoothness and reliability over outright performance, with sufficient torque for highway cruising and load carrying. Emissions compliance is achieved through a close-coupled three-way catalyst and adaptive lambda control, allowing Euro 6b compliance across its production run.
One documented concern is premature exhaust camshaft wear, highlighted in Ford Service Action 17S03. This issue arises from inadequate lubrication at the camshaft lobes under sustained high-load operation, particularly in vehicles used for towing or prolonged motorway driving. From 2017, Ford revised the camshaft material and updated oil flow calibration to mitigate the issue.
All production years 2015–2018 meet Euro 6b standards (VCA UK Type Approval #VCA/EMS/6789).
The Ford MX is a 1,999 cc inline-four naturally aspirated petrol engine engineered for mid-size passenger vehicles (2015–2018). It combines Ti-VCT with multi-point injection to deliver smooth power delivery and strong mid-range torque. Designed to meet Euro 6b emissions standards, it balances drivability with fuel efficiency in non-turbocharged applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,999 cc | |
| Fuel type | Petrol (Unleaded, 95 RON min) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 82.5 mm × 93.2 mm | |
| Power output | 103 kW (140 PS) @ 6,500 rpm | |
| Torque | 188 Nm @ 4,500 rpm | |
| Fuel system | Bosch ME7.9.10 multi-point injection | |
| Emissions standard | Euro 6b | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled | |
| Camshaft drive | Timing chain (single-row) | |
| Oil type | Ford WSS-M2C946-B (5W-30) | |
| Dry weight | 118 kg |
The MX's naturally aspirated design provides linear throttle response ideal for relaxed driving, but requires adherence to 15,000 km oil service intervals to prevent camshaft wear and timing chain stretch. Ford WSS-M2C946-B (5W-30) oil is essential due to its anti-wear additives protecting the cam lobes. Extended high-load operation and towing increase stress on the exhaust camshaft. Using fuel meeting Ford's FS-75 specification helps maintain injector cleanliness. Post-2017 models feature revised camshaft hardening; earlier units should be inspected per Ford Service Action 17S03. The long stroke design enhances mid-range torque but limits high-RPM efficiency.
Oil Specs: Requires Ford WSS-M2C946-B (5W-30) specification (Ford SIB 17S03). Meets Ford's mid-SAPS requirements for camshaft protection.
Emissions: Euro 6b certification applies to all 2015–2018 models (VCA Type Approval #VCA/EMS/6789). No market-specific variants.
Power Ratings: Measured under UN ECE Regulation 83. Output requires 95 RON fuel; 98 RON may improve high-RPM performance (Ford TIS Doc. WSD-MX-2015).
Ford Technical Information System (TIS): Docs WSD-MX-2015, SIB 17S03
VCA Type Approval Database (VCA/EMS/6789)
UN ECE Regulation 83: Uniform provisions concerning the approval of vehicles with regard to the emission of pollutants.
The Ford MX was used across Ford's CD400 platform with transverse mounting. This engine received platform-specific adaptations-revised torque mounts in the S-Max and enhanced cooling in the Galaxy-and from 2017 the facelifted Mondeo models adopted updated engine calibration, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the left-side cylinder block near the exhaust manifold (Ford TIS WSD-MX-2015). The 8th VIN digit indicates engine type ('L' for MX series). Pre-2017 models have black valve covers with silver Ford lettering; post-2017 units retain similar appearance but feature revised ECU calibration. Critical differentiation from EcoBoost variants: MX engines lack a turbocharger and intercooler, with a simpler intake manifold. Service parts require production date verification—camshafts before 03/2017 are subject to Service Action 17S03 and should be upgraded.
The MX's primary reliability risk is exhaust camshaft lobe wear, with elevated incidence in high-load and towing applications. Ford internal field reports from 2018 indicated a significant number of pre-2017 units required camshaft replacement before 120,000 km, while UK DVSA MOT data shows increased emissions-related failures in high-mileage examples. Prolonged high-RPM operation and infrequent oil changes exacerbate wear, making oil quality and driving pattern awareness critical.
Analysis derived from Ford technical bulletins (2015–2018) and UK DVSA failure statistics (2018–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD MX.
Comprehensive technical documentation and regulatory references
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FORD Official Site
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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)
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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
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