The Ford FXJB is a 2,261 cc, inline-four, turbocharged petrol engine produced between 2021 and 2025. It belongs to Ford's EcoBoost engine family, featuring direct fuel injection, twin-scroll turbocharging, and dual independent variable cam timing (Ti-VCT). In standard tune, it delivers 231 kW (314 PS) and 430 Nm of torque, providing high-performance characteristics for sport-oriented applications.
Fitted exclusively to the Ford Mustang (S550 facelift) in North American and select global markets, the FXJB petrol engine was engineered for aggressive throttle delivery and strong mid-range pull. Emissions compliance was achieved via a three-way catalytic converter, gasoline particulate filter (GPF), and closed-loop lambda control, meeting U.S. EPA Tier 3 Bin 30 and Euro 6d standards across all production years.
One documented service concern is premature wear of the high-pressure fuel pump (HPFP) plunger, particularly in vehicles subjected to frequent high-load operation. This issue, referenced in Ford Service Action 22S05, is attributed to elevated thermal stress and fuel quality sensitivity. From 2023, a revised HPFP with enhanced cooling and hardened components was introduced to improve durability under sustained performance use.
All production years 2021–2025 meet U.S. EPA Tier 3 Bin 30 and Euro 6d (6d-ISC-FCM) emissions standards (VCA UK Type Approval #VCA/EMS/7890).
The Ford FXJB petrol is a 2,261 cc inline-four turbocharged engine engineered for high-performance passenger vehicles (2021–2025). It combines direct injection with a twin-scroll turbocharger and Ti-VCT to deliver aggressive throttle response and strong torque delivery. Designed to meet Tier 3 Bin 30 and Euro 6d standards, it balances performance with emissions compliance for sport-focused applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,261 cc | |
| Fuel type | Petrol (Unleaded, 98 RON recommended) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 88.0 mm × 93.0 mm | |
| Power output | 231 kW (314 PS) @ 5,500 rpm | |
| Torque | 430 Nm @ 3,000–4,000 rpm | |
| Fuel system | Direct injection (GDi) with high-pressure fuel pump | |
| Emissions standard | U.S. EPA Tier 3 Bin 30 / Euro 6d (6d-ISC-FCM) | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single twin-scroll turbo (IHI VF56) | |
| Timing system | Timing chain (single-row, front-mounted) | |
| Oil type | Ford WSS-M2C949-B (5W-30) – full synthetic | |
| Dry weight | 171 kg |
The turbocharged GDi design provides strong low-end torque ideal for spirited driving but requires adherence to 15,000 km oil change intervals to prevent high-pressure fuel pump and turbocharger degradation. Ford WSS-M2C949-B (5W-30) full synthetic oil is critical due to its thermal stability and protection for turbo bearings and HPFP components. Use of 98 RON fuel is recommended to prevent pre-ignition and maintain performance calibration. Post-2023 models feature upgraded HPFP units; pre-2023 engines should be monitored for fuel pressure faults per Ford SIB 22S05. GPF longevity depends on regular highway runs to enable passive regeneration and avoid clogging. Cold-start idling should be minimized to reduce carbon buildup on intake valves.
Oil Specs: Requires Ford WSS-M2C949-B (5W-30) full synthetic specification (Ford SIB 22S05). Compatible with API SP and ACEA A5/B5.
Emissions: Euro 6d and U.S. Tier 3 Bin 30 certification applies to all models (2021–2025) (VCA Type Approval #VCA/EMS/7890). GPF fitted on all units.
Power Ratings: Measured under SAE J1349 standards. Output consistent across all markets (Ford Group PT-2021).
Ford Technical Information Service (XTIS): Docs EB-9840, EB-9845, EB-9850, SIB 22S05
VCA Type Approval Database (VCA/EMS/7890)
SAE International: J1349 Engine Power Certification Standards
The Ford FXJB Petrol was used exclusively in the Ford S550 platform with longitudinal mounting and no external licensing. This engine received platform-specific calibration tuning for the Mustang's rear-wheel-drive layout and from 2023, an updated high-pressure fuel pump and revised engine management software were introduced to address thermal stress concerns, creating service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the left-side cylinder block near the exhaust manifold (Ford XTIS EB-9840). The 8th VIN digit indicates engine type ('M' for 2.3L EcoBoost). Pre-2023 models have silver valve covers with black timing covers; post-2023 units use black valve covers. Critical differentiation from naturally aspirated variants: FXJB has a turbocharger mounted on the right side and a high-pressure fuel pump on the cam cover. Service parts require build date verification—HPFP units for pre-2023 engines are not interchangeable with post-update units due to internal revisions (Ford SIB 22S05).
The FXJB petrol's primary reliability risk is high-pressure fuel pump wear on pre-2023 units, with elevated incidence in performance-oriented driving. Ford's internal field reports from 2022–2024 indicated a measurable rate of HPFP replacement before 80,000 km in affected batches, while UK DVSA data shows increased GPF clogging linked to short-trip use in urban environments. High-load cycles and low-octane fuel increase thermal and mechanical stress, making oil quality, fuel specification, and maintenance timing critical.
Analysis derived from Ford technical bulletins (2021-2025) and UK DVSA failure statistics (2022-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD FXJB.
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