The Ford A9JA is a 1,998 cc, inline-four turbo-diesel engine produced between 2015 and 2020 as part of the Ford EcoBlue family. It features high-pressure common-rail direct injection, variable geometry turbocharging (VGT), and twin independent variable cam timing (Ti-VCT), delivering strong low-end torque and improved fuel efficiency. Its modular design supports multiple output variants across global platforms.
Fitted to models such as the C519 Mondeo, CX482 Edge, and PX65 Transit Custom, the A9JA engine was engineered for responsive performance and low CO₂ emissions in both passenger and light commercial applications. Emissions compliance was achieved through dual-loop exhaust gas recirculation (EGR), a diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling Euro 6 compliance across its production run.
One documented concern is premature high-pressure fuel pump (HPFP) wear under low-fuel-level operation, highlighted in Ford Service Action 18M03. This issue stems from inadequate fuel cooling and lubrication when the tank is consistently run below ¼ full. From 2018, revised fuel pump calibration and updated monitoring logic were implemented to reduce thermal stress in later production units.
All production years (2015–2020) meet Euro 6b emissions standards with SCR/AdBlue system (VCA UK Type Approval #VCA/EMS/6789).
The Ford A9JA is a 1,998 cc inline-four turbo-diesel engine engineered for mid-size and commercial platforms (2015–2020). It combines Bosch CRS 3-18 common-rail injection with a variable geometry turbocharger (VGT) and Ti-VCT to deliver robust low-RPM torque and refined operation. Designed to meet Euro 6b standards, it integrates SCR/AdBlue technology for NOx control while maintaining real-world drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (VGT) | |
| Bore × stroke | 82.0 mm × 94.6 mm | |
| Power output | 88–110 kW (120–150 PS) | |
| Torque | 300–370 Nm @ 1,500–2,750 rpm | |
| Fuel system | Bosch CRS 3-18 common-rail (up to 2,500 bar) | |
| Emissions standard | Euro 6b (with SCR/AdBlue) | |
| Compression ratio | 15.8:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Garrett variable-geometry turbo (VNT) | |
| Timing system | Chain (front-mounted; revised guides post-2018) | |
| Oil type | Ford WSS-M2C946-B1 (5W-30) | |
| Dry weight | 158 kg |
The Garrett VGT turbo provides strong low-RPM torque ideal for towing and urban driving but requires adherence to 15,000 km oil change intervals using Ford WSS-M2C946-B1 (5W-30) to maintain timing chain and turbo bearing life. The Bosch CRS 3-18 fuel system demands ultra-low-sulfur diesel (EN 590) and consistent fuel levels above ¼ tank to prevent HPFP overheating. SCR/AdBlue system requires periodic refill (~1,500 km consumption) and must not be disabled to avoid DPF saturation and engine derate. Post-2018 models feature improved fuel pump calibration; pre-2018 units should be monitored per Ford SIB 18M03. EGR cooler and DPF require cleaning if short-trip driving predominates.
Oil Specs: Requires Ford WSS-M2C946-B1 (5W-30) specification (Ford SIB 18M03). Supersedes ACEA C2 requirements.
Emissions: Euro 6b certification applies to all A9JA models (2015–2020) with SCR system (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under SAE J1349 standards. 110 kW output requires EU5+ diesel (Ford TIS Doc. B42602).
Ford Technical Information System (TIS): Docs B42021, B42104, B42602, SIB 18M03
VCA Type Approval Database (VCA/EMS/6789)
SAE International: J1349 Engine Power Certification Standards
The Ford A9JA was used across Ford's C5xx/PXxx platforms with transverse mounting and shared architecture with Land Rover for global scalability. This engine received platform-specific tuning—longer intake tracts in the Edge and enhanced cooling in the Transit Custom—and from 2018 the facelifted Mondeo adopted revised EGR calibration, creating interchange limits. Partnerships enabled Land Rover's D200 diesel to share core injection and turbo technology. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the front cylinder block near the starter motor (Ford TIS B42090). The 8th VIN digit indicates engine family ('L' for A9JA series). Pre-2018 models have silver valve covers with black plastic timing covers; post-2018 units use black valve covers. Critical differentiation from A9JB: Original A9JA uses Bosch EDC17CP55 ECU with rectangular diagnostic port under hood, while A9JB uses MD17CP66 with circular port. Service parts require production date verification—fuel pumps for engines before 04/2018 are incompatible with later units due to internal revisions per Ford SIB 18M03.
The A9JA's primary reliability risk is high-pressure fuel pump degradation on early builds, with elevated incidence in mixed urban/highway use. Internal Ford quality reports from 2019 noted a significant share of pre-2018 engines requiring HPFP replacement before 180,000 km, while UK DVSA records link a notable portion of emissions-related MOT failures to DPF clogging in stop-start vehicles. Short-trip driving and low fuel levels increase pump and DPF stress, making fuel quality and driving pattern adherence critical.
Analysis derived from Ford technical bulletins (2017–2020) and UK DVSA failure statistics (2018–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD A9JA.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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