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 as the Citroën C5, Jumpy, and Peugeot Expert, the DW10ATED4 was engineered for durability and fuel efficiency in executive and light commercial segments. Emissions compliance was achieved through exhaust gas recirculation (EGR), diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling Euro 5 and later Euro 6c compliance across its production run.
One documented reliability concern is high-pressure fuel pump (HPFP) wear, highlighted in PSA Service Bulletin SIB-FUE-2014-06. This issue arises from abrasive particulate contamination in diesel fuel and extended service intervals, leading to rail pressure instability. Later production units incorporated revised pump internals and enhanced fuel filtration to improve durability.
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 VGT turbo provides strong low-RPM torque ideal for stop-start and towing applications but requires strict adherence to 15,000 km oil change intervals to prevent turbo bearing and fuel pump wear. PSA B71 2310 (5W-30) oil is critical due to its soot-handling and thermal stability properties. Extended short-trip cycles increase DPF regeneration frequency and EGR coking. The Bosch CRS 2-16 HPFP demands ultra-low-sulfur diesel (EN 590) to prevent injector and pump wear. Timing belt replacement every 5 years or 120,000 km is essential due to interference design. SCR system requires periodic AdBlue refills and NOx sensor calibration.
Oil Specs: Requires PSA B71 2310 specification (PSA SIB-ENG-2014-06). Compatible with ACEA C3 but not a substitute.
Emissions: Euro 5 certification applies to 2011–2015 models (VCA Type Approval #VCA/EMS/5686). Euro 6c compliance confirmed for 2016–2018 units in UK markets.
Power Ratings: Measured under ECE R85 standards. 81 kW output optimized for urban and commercial efficiency (PSA TIS Doc. P22007).
PSA Technical Information System (TIS): Docs P21879, P21905, SIB-FUE-2014-06
VCA Type Approval Database (VCA/EMS/5686)
ISO 1585:1996 Road vehicles — Test code for net power of internal combustion engines
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.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the transmission bellhousing (PSA TIS P21894). The 8th VIN digit indicates engine family ('K' for DW10 series). Pre-2014 models have silver valve covers with black turbo inlet; post-2014 units use black valve covers. Critical differentiation from DW10TED4: DW10ATED4 has lower power output and revised ECU mapping for commercial applications. Service parts require build date verification—timing belts before 06/2014 are incompatible with later SCR-equipped variants due to revised tensioner routing (PSA SIB-ENG-2014-06).
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.
Find answers to most commonly asked questions about CITROEN RHT-DW10ATED4.
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