The Ford XWMB is a 999 cc, inline‑three turbocharged mild-hybrid petrol engine produced between 2020 and 2024. It features gasoline direct injection, a single twin‑scroll turbocharger, a 48V belt-driven integrated starter generator (BiSG), and dual overhead camshafts (DOHC). In standard form it delivers 92 kW (125 PS) and 210 Nm of torque (including electric boost), with enhanced low-end response and stop-start refinement enabled by the mild-hybrid system.
Fitted to models such as the Puma and Fiesta across European markets, the XWMB was engineered for urban efficiency with reduced CO₂ emissions and seamless stop-start operation. Emissions compliance was achieved through gasoline particulate filtration (GPF), cooled exhaust gas recirculation (EGR), and precise direct injection control, meeting Euro 6d standards across all production years.
One documented concern is premature wear of the high-pressure fuel pump (HPFP) cam follower under frequent stop-start cycles, highlighted in Ford Technical Service Bulletin TSB-21-2503. This issue stems from marginal lubrication during repeated cold starts and high thermal stress in urban driving. From late 2022, Ford updated the cam follower material and HPFP assembly to improve durability.
All production years (2020–2024) meet Euro 6d standards across EU markets (VCA UK Type Approval #VCA/EMS/9371).
The Ford XWMB is a 999 cc inline‑three turbocharged mild-hybrid petrol engine engineered for compact models (2020–2024). It combines gasoline direct injection with a twin‑scroll turbocharger and a 48V BiSG to deliver responsive low-end torque, refined stop-start behavior, and reduced CO₂ emissions. Designed to meet Euro 6d emissions standards universally, it balances urban drivability with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 999 cc | |
| Fuel type | Petrol (Gasoline) | |
| Configuration | Inline‑3, DOHC, 12‑valve | |
| Aspiration | Turbocharged (twin‑scroll) + 48V mild-hybrid | |
| Bore × stroke | 71.9 mm × 82.0 mm | |
| Power output | 92 kW (125 PS) | |
| Torque | 210 Nm @ 1,500–4,000 rpm (incl. electric boost) | |
| Fuel system | Bosch HDP6 high‑pressure direct injection (up to 250 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Garrett GT1246V twin‑scroll | |
| Timing system | Chain (front‑mounted) | |
| Oil type | Ford WSS-M2C948-B1 (SAE 5W‑30) | |
| Dry weight | 102 kg (incl. BiSG) |
The 48V BiSG system enables near-instantaneous restarts and torque-fill during gear changes, improving urban refinement. However, the direct injection system requires high-quality EN 228 95 RON fuel and strict adherence to 15,000 km oil change intervals using Ford WSS-M2C948-B1 oil to prevent HPFP cam follower wear. Pre-late-2022 engines are susceptible to HPFP failure under frequent stop-start conditions; updated pumps (per TSB-21-2503) should be installed if symptoms arise. The GPF regenerates passively during normal driving but may require active cycles in short-trip usage.
Oil Specs: Requires Ford WSS-M2C948-B1 (5W-30) specification (Ford TSB-21-2503). Meets ACEA C5 with additional Ford durability requirements.
Emissions: Euro 6d compliance is universal across all 2020–2024 XWMB production (VCA Type Approval #VCA/EMS/9371).
Power Ratings: Measured under ISO 1585 standards. Torque includes 15–20 Nm electric assist from BiSG (Ford PT-2023 documentation).
Ford Technical Information System (TIS): Docs F31022, F31050, TSB-21-2503
VCA Type Approval Database (VCA/EMS/9371)
ISO 1585: Road vehicles — Engine test code
The Ford XWMB was used across Ford's B2E platform with transverse mounting and exclusive to European emissions-compliant variants. This engine received platform-specific adaptations—revised engine mounts in the Puma and compact 48V belt routing in the Fiesta—and from late 2022 the updated HPFP assembly created minor service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crank pulley (Ford TIS F31025). The 8th VIN digit indicates engine type ('W' for XWMB). Early models (2020–late 2022) use black cam covers with silver Ford logo; post-late-2022 units feature matte black covers with updated HPFP bracket. Critical differentiation from XVJC: XWMB includes 48V BiSG, mild-hybrid belt drive, and higher torque (210 Nm vs 170 Nm). Service parts for HPFP and cam follower are production-date sensitive—verify build date before ordering (Ford TSB-21-2503).
The XWMB's primary reliability risk is high-pressure fuel pump (HPFP) cam follower wear in pre-late-2022 builds, with elevated incidence in urban stop-start use. Ford internal quality data from 2023 indicated a measurable share of early engines requiring HPFP replacement before 80,000 km, while UK DVSA records show excellent emissions compliance due to robust GPF and EGR integration. Frequent cold starts and low-quality fuel increase pump stress, making fuel quality and maintenance adherence critical.
Analysis derived from Ford technical bulletins (2020–2024) and UK DVSA failure statistics (2021–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD XWMB.
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