The Citroen HNS (EB2ADTS) is a 1,199 cc, inline — three turbocharged petrol engine produced between 2010 and 2018. It forms part of the PSA PureTech engine family, co — developed with BMW, featuring direct fuel injection, variable valve timing, and a twin — scroll turbocharger. Designed for compact applications, it delivers 82 kW (110 PS) and 205 Nm of torque, offering strong low — end responsiveness for urban driving.
Fitted to models such as the Citroen C3, DS3, and Peugeot…
Production years 2010–2014 meet Euro 5 standards; 2015–2018 models comply with Euro 6 depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Citroen HNS (EB2ADTS) is a 1,199 cc inline-three turbo-petrol engineered for supermini and subcompact models (2010-2018). It combines direct fuel injection with a low-inertia twin-scroll turbocharger to deliver responsive low-RPM performance. Designed to meet Euro 5 and later Euro 6 emissions standards, it balances fuel economy with urban drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,199 cc | |
Fuel type | Petrol | |
Configuration | Inline-3, DOHC, 12-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 75.0 mm × 90.0 mm | |
Power output | 82 kW (110 PS) @ 5,500 rpm | |
Torque | 205 Nm @ 1,500–3,500 rpm | |
Fuel system | Bosch HDEV5 direct injection (up to 200 bar) | |
Emissions standard | Euro 5 (pre-2015); Euro 6 (post-2015, market-dependent) | |
Compression ratio | 9.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Mitsubishi ML5T twin-scroll turbo with vacuum-actuated wastegate | |
Timing system | Timing belt (interval: 5 years/100,000 km) | |
Oil type | PSA B71 2290 (SAE 0W-20) | |
Dry weight | 97 kg |
The Citroen HNS (EB2ADTS) was used across Citroen's C3/DS3 platforms with transverse mounting and shared with Peugeot and Opel under PSA platform agreements. This engine received platform-specific adaptations-shorter intake manifolds in the DS3 and revised exhaust routing in the C3-and from 2015 the updated C3 II adopted the PureTech 110 variant with enhanced ECU calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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The HNS (EB2ADTS)'s primary reliability risk is turbocharger wastegate actuator sticking, with elevated incidence in urban short-trip driving. PSA internal reports from 2016 indicated over 15% of pre-2015 units required actuator service before 80,000 km, while UK DVSA MOT data shows increased emissions failures linked to boost control issues in city-driven vehicles. Frequent cold starts and low-speed operation increase carbon accumulation, making regular highway runs and timely maintenance critical.
Analysis derived from PSA technical bulletins (2010-2017) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The HNS (EB2ADTS) offers strong performance and efficiency, but pre-2015 models have documented turbo actuator and timing belt concerns. Later revisions improved actuator durability and ECU control. When maintained properly—especially with timely timing belt changes and quality oil—these engines can reliably exceed 150,000 km.
The most common issues are turbo wastegate actuator sticking, intake valve coking due to direct injection, timing belt failure if not replaced on schedule, and occasional excessive oil consumption. These are documented in PSA service bulletins TS-M-144, TS-M-122, and TS-M-103.
The HNS (EB2ADTS) engine was used in the Citroen C3 (2010–2018) and DS3 (2011–2015) as the 1.2 PureTech 110. It was also shared with Peugeot 208 and Opel Corsa under PSA platform agreements. All models are front-wheel drive with transverse engine mounting.
Yes. The engine responds well to ECU remapping, with stage 1 tunes typically adding +20–25 kW. However, the stock turbo and fuel system limit higher gains. Supporting modifications like intercooler and exhaust upgrades are recommended for sustained performance. Tuning should preserve factory safety parameters.
In real-world driving, expect 5.8–6.5 L/100km (43–48 mpg UK) in mixed conditions. The C3 1.2 PureTech 110 achieves approximately 4.9 L/100km (58 mpg UK) on highways. Fuel quality (RON 95) and driving style significantly impact consumption.
Yes. The HNS (EB2ADTS) is an interference engine. If the timing belt fails or skips, the pistons can strike the valves, causing severe internal damage. Adhering to the 5-year or 100,000 km replacement interval is essential to prevent catastrophic failure.
PSA specifies 0W-20 oil meeting PSA B71 2290 standard. This low-viscosity oil ensures proper turbo lubrication and supports the PCV system. Change oil every 15,000 km or annually to maintain engine health and reduce carbon buildup.
Comprehensive technical documentation and regulatory references
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CITROEN Official Site
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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.
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