The Citroen 5GR, known internally as EP6FDTX, is a 1,598 cc, inline — four turbocharged petrol engine produced between 2010 and 2018. It forms part of the PSA — Honda joint — development program and features direct fuel injection, variable valve timing (VVT), and a twin — scroll turbocharger. In standard tune, it delivers 147 kW (200 PS) and 275 Nm of torque, primarily used in performance — oriented applications.
Fitted to models such as the Citroën DS3 Racing, DS4, and DS5 Hyb…
Production years 2010–2015 meet Euro 5 standards; 2016–2018 models comply with Euro 6b depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Citroën 5GR (EP6FDTX) is a 1,598 cc inline-four turbocharged petrol engine engineered for compact premium models (2010–2018). It combines direct fuel injection with a twin-scroll turbocharger to deliver high specific output and responsive throttle characteristics. Designed to meet Euro 5 and later Euro 6b standards, it balances performance with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (Mitsubishi TD04HL-15T) | |
Bore × stroke | 77.0 mm × 85.8 mm | |
Power output | 147 kW (200 PS) @ 5,500–6,250 rpm | |
Torque | 275 Nm @ 1,900–4,500 rpm | |
Fuel system | Bosch HDEV5 direct injection (up to 200 bar) | |
Emissions standard | Euro 5 (2010–2015); Euro 6b (2016–2018) | |
Compression ratio | 9.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Mitsubishi TD04HL-15T twin-scroll | |
Timing system | Timing chain (DOHC) | |
Oil type | Total Quartz INEO ECS 5W-30 | |
Dry weight | 125 kg |
The Citroën 5GR (EP6FDTX) was used across Citroën's DS premium sub-brand platforms with transverse mounting and shared with Peugeot and Opel under PSA group harmonization. This engine received platform-specific calibrations-adaptive throttle mapping in the DS5 Hybrid4 and revised intercooler routing in the DS3 Racing-and from 2016, Euro 6b-compliant variants introduced cooled EGR and enhanced lambda control, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The EP6FDTX's primary reliability risk is turbocharger wastegate actuator sticking, with elevated incidence in urban driving with frequent short trips. PSA internal field reports from 2015 indicated a significant share of pre-2014 units required actuator service before 100,000 km, while UK DVSA MOT records show increased emissions failures linked to boost control faults in stop-start conditions. Extended idling and poor fuel quality exacerbate carbon buildup, making oil and fuel system maintenance critical.
Analysis derived from PSA technical bulletins (2012-2017) and UK DVSA failure statistics (2014-2022). Repair procedures should follow manufacturer guidelines.
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The EP6FDTX delivers strong performance but requires disciplined maintenance. Early models (2010–2013) had turbo actuator and timing guide concerns. Later revisions (post-2014) improved durability. Regular oil changes with PSA-approved 5W-30 and using high-octane fuel greatly enhance longevity. Well-maintained examples can exceed 150,000 km reliably.
Key issues include turbo wastegate actuator sticking, timing chain guide wear, high-pressure fuel pump failure, and intercooler pipe leaks. These are documented in PSA service bulletins. Carbon buildup and thermal stress are primary contributors. Preventive maintenance significantly reduces risk.
This 1.6L turbo petrol was used in Citroën's DS sub-brand: DS3 (1.6 THP 200), DS4 (1.6 THP 200), and DS5 (1.6 THP 200 / Hybrid4). It was also shared with Peugeot 308 GT and Opel Astra J GTC. Models from 2016–2018 meet Euro 6b standards.
Yes. The engine responds well to ECU remapping, with stage 1 tunes safely achieving 230–245 PS. Supporting mods like intercooler and exhaust upgrades allow further gains. However, over-tuning increases stress on the turbo and fuel system. Use reputable tuners familiar with PSA systems.
Moderate for a performance engine. In a DS4 1.6 THP 200, combined consumption is ~7.2 L/100 km (~39 mpg UK). City driving may see 9–10 L/100 km, while highway runs can achieve ~6.0 L/100 km (~47 mpg UK). Real-world figures depend heavily on driving style.
Yes. The EP6FDTX is an interference engine. If the timing chain fails or jumps, piston-to-valve contact will occur, causing severe internal damage. Chain guide inspection during service is essential. Any timing-related rattles must be addressed immediately.
PSA specifies Total Quartz INEO ECS 5W-30 (meets PSA B71 2290). This low-SAPS oil protects the turbocharger and exhaust system. Change every 15,000 km or annually. Using incorrect oil can lead to turbo coking and chain wear.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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