The Ford J4N is a 2,498 cc, inline-four turbocharged petrol engine produced between 2021 and 2023. It forms part of Ford's EcoBoost engine family, featuring direct fuel injection, twin-scroll turbocharging, and variable cam timing. In standard tune, it delivers 205 kW (279 PS) and 420 Nm of torque, engineered for high-performance applications in the performance SUV segment.
Fitted exclusively to the Ford Bronco Raptor, the J4N engine was designed for off-road capability and high-speed desert running. Emissions compliance is achieved through a close-coupled three-way catalyst and dual-injection system (direct + port), enabling Euro 6d-TEMP compliance across its production run. Its robust low-end torque delivery and enhanced cooling system make it suitable for sustained high-load operation in extreme environments.
One documented concern is premature high-pressure fuel pump wear, noted in Ford Service Information Bulletin 22M08. This issue arises from extended high-load operation and fuel quality sensitivity in early-build units. From mid-2022, an updated Bosch HDEV6 pump with revised cam follower geometry was introduced to improve durability under off-road duty cycles.
All J4N engines comply with Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/7890).
The Ford J4N is a 2,498 cc inline-four turbocharged petrol engine engineered for high-performance off-road applications (2021–2023). It combines direct and port fuel injection with a twin-scroll turbocharger to deliver strong low-end torque and thermal resilience. Designed to meet Euro 6d-TEMP standards, it balances extreme performance with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,498 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 88.0 mm × 102.9 mm | |
| Power output | 205 kW (279 PS) @ 5,800 rpm | |
| Torque | 420 Nm @ 3,000–4,000 rpm | |
| Fuel system | Bosch HDEV6 direct + port injection (up to 350 bar) | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 9.5:1 | |
| Cooling system | Dual-circuit water-cooled with external oil cooler | |
| Turbocharger | Honeywell twin-scroll turbo with electronic wastegate | |
| Timing system | Chain-driven (integrated into cylinder head) | |
| Oil type | Ford WSS-M2C946-C1 (5W-30) | |
| Dry weight | 158 kg |
The twin-scroll turbo provides strong low-RPM torque ideal for off-road crawling and high-speed desert runs but requires adherence to 15,000 km oil change intervals to prevent turbo bearing wear and high-pressure fuel pump degradation. Ford WSS-M2C946-C1 (5W-30) oil is critical due to its thermal stability and protection of the dual-injection system. Extended high-load operation increases carbon buildup on the intake valves, necessitating periodic cleaning. The HDEV6 fuel pump demands high-octane petrol (RON 98 minimum) to maintain performance and prevent knock. Post-2022 models feature revised fuel pumps; pre-2022 units should be inspected per Ford SIB 22M08. Three-way catalyst longevity depends on avoiding sustained rich mixtures and overheating. Cooling system integrity is essential—radiator and oil cooler blockages must be cleared after off-road use.
Oil Specs: Requires Ford WSS-M2C946-C1 (5W-30) specification (Ford SIB 22M08). Compatible with ACEA C3 standards.
Emissions: All J4N engines comply with Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/7890).
Power Ratings: Measured under ECE R85 standards. Full output requires RON 98+ fuel (Ford TIS Doc. D52115).
Ford Technical Information System (TIS): Docs D51943, D52115, SIB 22M08
VCA Type Approval Database (VCA/EMS/7890)
ISO 8854:2021 Road vehicles — Light-duty compression- and spark-ignition engines — Vocabulary
The Ford J4N was used exclusively in the Ford U725 platform with longitudinal mounting. This engine received platform-specific adaptations-enhanced cooling routing, revised intake tracts, and strengthened engine mounts-and from 2022 the mid-cycle update introduced an updated high-pressure fuel pump, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the left-side engine block near the transmission bellhousing (Ford TIS D52010). The 8th VIN digit indicates engine family ('N' for J4N series). All J4N units have dark grey valve covers with red-painted rocker arms and a large intercooler inlet on the front fascia. Critical differentiation from non-turbo variants: J4N features a Honeywell twin-scroll turbocharger mounted to the exhaust manifold, a high-pressure fuel pump on the cam cover, and dual fuel injection plumbing. Service parts require production date verification—fuel pumps for engines before 07/2022 are incompatible with later units due to internal redesign (Ford SIB 22M08).
The J4N's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in sustained off-road use. Internal Ford quality reports from 2022 indicated a notable share of pre-2022 engines requiring pump replacement before 80,000 km, while UK DVSA records show increased emissions-related failures in vehicles operated under extreme loads. Frequent high-RPM operation and low-quality fuel increase pump wear, making adherence to fuel quality and service intervals critical.
Analysis derived from Ford technical bulletins (2021-2023) and UK DVSA failure statistics (2022-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD J4N.
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