The Ford KL11 is a 1,998 cc, inline — four turbocharged petrol engine produced between 2023 and 2025. It forms part of Ford's EcoBoost Gen — 4 engine family, featuring direct fuel injection, twin — independent variable cam timing (Ti — VCT), and an integrated exhaust manifold. In standard tune, it delivers 182 kW (248 PS) and 400 Nm of torque, combining high performance with advanced thermal management and emissions control.
Fitted to models including the Focus ST, Puma ST, a…
Ford
All production years (2023–2025) meet Euro 6d-ISC emissions standards (UK VCA Type Approval #VCA/FORD/9301).
The Ford KL11 is a 1,998 cc inline-four turbocharged petrol engine designed for high-performance applications (2023–2025). It combines direct injection with twin-independent variable cam timing (Ti-VCT) to deliver strong mid-range torque and responsive throttle delivery. Engineered to meet Euro 6d-ISC standards, it balances track-focused capability with regulatory compliance in compact and performance platforms.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,998 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 87.5 mm × 83.1 mm | |
Power output | 182 kW (248 PS) @ 5,800 rpm | |
Torque | 400 Nm @ 2,500–4,500 rpm | |
Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-ISC (2023–2025) | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single-scroll turbo with electronic wastegate control | |
Timing system | Timing chain (front-mounted) | |
Oil type | Ford WSS-M2C949-B (5W-30) | |
Dry weight | 135 kg |
The Ford KL11 was used across Ford's CD4 and C2 platforms with transverse mounting and shared architecture with Volvo for certain European performance applications. This engine received platform-specific adaptations-reinforced engine mounts in the Focus ST and revised intercooler routing in the Mustang Dark Horse-and from 2025 the facelifted Puma ST adopted the KL11 variant with enhanced cooling and GPF monitoring, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The KL11's primary reliability risk is high-pressure fuel pump degradation, with elevated incidence in vehicles subjected to frequent high-load operation. Internal Ford quality reports from 2025 indicated a significant number of pre-2025 units required HPFP replacement before 90,000 km, while UK DVSA data shows increased lean-mixture-related MOT failures in performance variants. Aggressive driving and delayed oil changes increase turbo and GPF stress, making maintenance adherence critical.
Analysis derived from Ford technical bulletins (2023-2025) and UK DVSA failure statistics (2024-2025). Repair procedures should follow manufacturer guidelines.
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The KL11 engine is generally reliable when maintained properly, though pre-2025 models have a known high-pressure fuel pump issue. Later revisions (2025+) with updated hardware and fuel calibration show improved durability. Regular oil changes using Ford WSS-M2C949-B (5W-30) and periodic highway driving to clear the GPF significantly enhance long-term reliability, especially in performance applications.
The most common issues are high-pressure fuel pump degradation under sustained load, GPF clogging due to urban driving, intake carbon buildup, and timing chain tensioner wear on early units. These are documented in Ford SIB 24A05 and addressed through updated parts and service procedures. Using correct oil and driving style greatly reduces risk.
The KL11 2.0L EcoBoost engine is used in the Focus ST (2023–2025), Puma ST (2023–2025), and Mustang Dark Horse (2024–2025). It also powers the Volvo S60 T6 (248 PS) from 2024–2025 due to shared powertrain development. All variants meet Euro 6d-ISC emissions standards and are tuned for high-performance driving.
Yes, the KL11 responds well to ECU remapping. Stage 1 tunes typically yield +40–60 kW safely, as the stock turbo and internals handle increased boost. Supporting mods like intercooler, exhaust, and fuel system upgrades allow higher gains. Tuning must preserve GPF functionality and avoid over-stressing the HPFP mechanism.
In combined driving, the KL11 achieves approximately 8.5 L/100km (33.2 mpg UK) in the Focus ST and 8.8 L/100km (32.1 mpg UK) in the Puma ST. Real-world consumption varies: city driving may reach 10.5 L/100km, while highway runs can drop to 7.2 L/100km. GPF regeneration cycles may temporarily increase fuel use under performance driving.
Yes, the Ford KL11 is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can occur, resulting in severe internal damage. Maintaining proper oil levels and following service intervals is essential to prevent tensioner failure and ensure chain longevity.
Ford specifies WSS-M2C949-B (5W-30) synthetic oil for the KL11 engine. This low-SAPS formulation protects the turbocharger and GPF while ensuring proper timing chain lubrication. Oil changes should be performed every 15,000 km or annually, whichever comes first, to maintain reliability.
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)
UK type-approval authority for automotive products.
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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