The Citroën RHT (engine code DW10ATED4) is a 1,997 cc, inline — four turbocharged diesel engine produced by PSA Group between 2011 and 2018. It features high — pressure common — rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC), delivering 81 kW (110 PS) at 3,500 rpm and 300 Nm of torque at 1,750–2,500 rpm. This configuration provides strong low — end pull ideal for mid — size and commercial applications.
Fitted to models such a…
Production years 2011–2015 meet Euro 5 standards; 2016–2018 models comply with Euro 6c depending on market (VCA UK Type Approval #VCA/EMS/5686).
The Citroën RHT (DW10ATED4) is a 1,997 cc inline-four turbo-diesel engine engineered for mid-size and light commercial vehicles (2011–2018). It combines common-rail injection with a variable geometry turbocharger to deliver responsive low-RPM torque and improved fuel economy. Designed to meet Euro 5 and Euro 6c standards, it balances efficiency with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,997 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (variable geometry turbo) | |
Bore × stroke | 85.0 mm × 88.0 mm | |
Power output | 81 kW (110 PS) @ 3,500 rpm | |
Torque | 300 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch CRS 2-16 common-rail (up to 1,600 bar) | |
Emissions standard | Euro 5 (2011–2015); Euro 6c (2016–2018) | |
Compression ratio | 15.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Honeywell variable geometry turbo (VGT) with electronic actuator | |
Timing system | Timing belt (interference design) | |
Oil type | PSA B71 2310 (SAE 5W-30) | |
Dry weight | 148 kg |
The Citroën RHT (DW10ATED4) was used across Citroën's PF3/SC platforms with longitudinal mounting and shared with Peugeot for executive and light commercial applications. This engine received platform-specific calibrations—longer intake runners in the C5 and revised exhaust manifolds in the Jumpy—and from 2016 the facelifted C5 adopted the Euro 6c-compliant DW10ATED4 variant with revised NOx sensors, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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The DW10ATED4's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in vehicles fueled at non-branded stations. Internal PSA field reports from 2015 indicated a notable number of pre-2015 units required HPFP replacement before 100,000 km, while UK DVSA data links a significant share of emissions-related MOT failures to EGR valve clogging in high-mileage examples. Short-trip cycles and poor fuel quality increase particulate and thermal stress, making maintenance interval adherence and fuel specification critical.
Analysis derived from PSA technical bulletins (2012–2017) and UK DVSA failure statistics (2016–2023). Repair procedures should follow manufacturer guidelines.
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The DW10ATED4 offers strong fuel economy and durability but is sensitive to fuel quality and maintenance. Pre-2015 models are prone to HPFP wear if low-quality diesel is used. Later revisions (post-2015) improved pump durability and SCR integration. Well-maintained examples with regular oil changes, quality fuel, and timely DPF regeneration can exceed 180,000 km.
Key issues include high-pressure fuel pump wear, EGR valve coking, DPF regeneration failure, and timing belt neglect. These are documented in PSA service bulletins. AdBlue system faults and NOx sensor degradation are also reported in high-mileage units. Cold-start hesitation may indicate injector wear.
The DW10ATED4 was used in the Citroën C5 2.0 BlueHDi 110 (2011–2017), Jumpy 2.0 BlueHDi 110 (2011–2018), and shared with Peugeot Expert and Opel Vivaro models. All units from 2011–2015 met Euro 5; 2016–2018 models comply with Euro 6c.
Yes. The DW10ATED4 responds well to ECU remapping, with stage 1 tunes typically adding +20–25 kW. The turbo and fuel system support moderate increases, but supporting mods (intercooler, exhaust) are recommended. Tuning should preserve DPF and EGR functionality to avoid emissions-related faults.
In a Citroën C5 2.0 BlueHDi 110, combined consumption is ~4.4 L/100km (64 mpg UK). Real-world figures vary: city driving may see 5.5–6.0 L/100km, while highway runs can achieve 4.0 L/100km (70 mpg UK). Driving style and DPF regeneration frequency significantly influence economy.
Yes. The DW10ATED4 uses an interference timing belt design. If the belt skips or breaks, pistons can contact open valves, resulting in severe internal engine damage. Replacement every 5 years or 120,000 km is critical to prevent catastrophic failure.
PSA specifies 5W-30 oil meeting PSA B71 2310 standard. This synthetic oil is formulated for turbocharged diesel engines with DPF and SCR systems. Change every 15,000 km or annually to ensure optimal component life and soot management.
Comprehensive technical documentation and regulatory references
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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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