The Citroen EHZ (DW10FDCU) is a 1,997 cc, inline — four turbocharged diesel engine produced between 2011 and 2018. It features a DOHC 16 — valve configuration with common rail direct injection and a variable geometry turbocharger (VGT), delivering 120 kW (163 PS) at 3,750 rpm and 370 Nm of torque at 2,000 rpm. Part of the PSA DW10 engine family, the DW10FDCU was engineered for refined performance and fuel efficiency in mid — size and premium platforms.
Fitted to models such as t…
Production years 2011–2018 meet Euro 5 standards with SCR/AdBlue system (VCA UK Type Approval #VCA/EMS/8901).
The Citroen EHZ (DW10FDCU) is a 1,997 cc inline-four turbocharged diesel engine engineered for mid-size and executive platforms (2011–2018). It combines common rail direct injection with a variable geometry turbocharger and SCR-based aftertreatment to deliver strong torque and emissions compliance. Designed to meet Euro 5 standards, it balances performance, refinement, and environmental requirements.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,997 cc | |
Fuel type | Diesel (ULSD, EN 590 compliant) | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (variable geometry) | |
Bore × stroke | 85.0 mm × 88.0 mm | |
Power output | 120 kW (163 PS) @ 3,750 rpm | |
Torque | 370 Nm @ 2,000 rpm | |
Fuel system | Delphi DCR common rail (up to 1,800 bar) | |
Emissions standard | Euro 5 (with SCR/AdBlue) | |
Compression ratio | 16.4:1 | |
Cooling system | Water-cooled | |
Turbocharger | Honeywell variable geometry turbo (VGT) | |
Timing system | Timing belt (renew every 120,000 km or 6 years) | |
Oil type | Total Rubia TIR 5000 5W-30 | |
Dry weight | 164 kg |
The Citroen EHZ (DW10FDCU) was used across Citroen's Platform 3 and Platform 4 with transverse mounting and shared extensively with Peugeot under PSA Group harmonisation. This engine received platform-specific adaptations-reinforced engine mounts in the C6 and revised ECU mapping in the Peugeot 508-and from 2014 the updated DW10FC variant introduced improved fuel pump durability, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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The DW10FDCU's primary reliability risk is high-pressure fuel pump wear on early builds, with elevated incidence in long-distance or poorly maintained vehicles. Internal PSA quality reports from 2015 indicated a notable share of pre-2014 engines required HPFP replacement before 120,000 km, while UK DVSA records link a significant portion of emissions-related MOT failures to EGR clogging in city-driven vehicles. Poor fuel quality and extended service intervals increase wear risk, making fuel filtration and oil quality critical.
Analysis derived from PSA technical bulletins (2011–2018) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
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The DW10FDCU is generally reliable when properly maintained, but early models (2011–2013) had high-pressure fuel pump concerns. Later revisions (post-2014) improved pump durability, so well-maintained examples can exceed 180,000 km. Regular fuel filter changes, timely timing belt replacement, and AdBlue system maintenance are essential for longevity.
The main issues are high-pressure fuel pump failure (especially pre-2014), timing belt failure due to age, EGR/DPF clogging from short trips, and AdBlue/SCR system faults. Other common complaints include turbo actuator sticking and occasional oil leaks. These are documented in PSA service bulletins and technical reports.
This 2.0L diesel engine was used in mid-size and executive Citroen models. It powered the C5 (2011–2017) and C6 (2011–2012). The engine was also shared with Peugeot (508, 5008) across the same production window. All variants meet Euro 5 standards with SCR/AdBlue technology.
Yes. The DW10FDCU responds well to ECU remapping. Stage 1 tunes typically gain +25–40 kW safely, as the stock turbo and internals handle increased boost. Supporting mods like intercooler upgrades and exhausts allow further gains. However, over-tuning without fuel system upgrades risks HPFP failure or DPF/SCR overload.
Excellent for its class. In a C5 or 508 (163 PS version), typical consumption is ~6.9 L/100km (city) and ~4.7 L/100km (highway), or about 48 mpg UK combined. Real-world figures depend on driving style. Expect 45–50 mpg (UK) on mixed roads for a healthy DW10FDCU.
Yes. The DW10FDCU is an interference engine. If the timing belt fails, pistons can strike open valves, causing severe internal damage. That's why belt replacement every 120,000 km or 6 years is critical—any sign of belt wear or tensioner noise should be addressed immediately.
PSA specifies Total Rubia TIR 5000 5W-30 synthetic oil. Use a high-quality oil suitable for modern diesel engines and change it every 15,000 km (or annually) to protect the EGR, DPF, SCR, and fuel system from wear and deposits.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
CITROEN Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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