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 Hybrid4, the EP6FDTX was engineered for responsive driving dynamics and sporty character. Emissions compliance was achieved through a three-way catalytic converter and closed-loop lambda control, allowing Euro 5 compliance across its production run. The engine’s high specific output made it ideal for compact premium models.
One documented concern is premature turbocharger wastegate actuator sticking, highlighted in PSA Service Bulletin 14/1023. This issue arises from carbon buildup on the actuator rod due to exhaust gas recirculation (EGR) residuals and high thermal cycling. From 2014, revised actuator hardware and updated ECU mapping were introduced to mitigate the fault.
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 twin-scroll turbo provides strong mid-range torque ideal for spirited driving but requires adherence to 15,000 km oil change intervals using PSA-approved 5W-30 to prevent turbo bearing and timing chain wear. Total Quartz INEO ECS 5W-30 is critical due to its low-SAPS formulation protecting the turbo and exhaust system. Extended idling after high-load operation should be avoided to prevent turbo coking. The Bosch HDEV5 fuel system demands fuel meeting EN 228 standards to avoid injector deposits. Post-2014 models feature revised wastegate actuators; pre-2014 units should be inspected per PSA SIB 14/1023. The ECU includes adaptive knock control to accommodate regional fuel quality variations.
Oil Specs: Requires Total Quartz INEO ECS 5W-30 specification (PSA SIB 14/1023). Meets PSA B71 2290 standard.
Emissions: Euro 5 certification applies to 2010–2015 models (VCA Type Approval #VCA/EMS/5678). Euro 6b compliance from 2016 varies by market.
Power Ratings: Measured under ECE R85 standards. 147 kW output requires 98 RON fuel for optimal performance (PSA TIS Doc. B13572).
PSA Technical Information System (TIS): Docs B13572, B13601, SIB 14/1023
VCA Type Approval Database (VCA/EMS/5678)
European Regulation (EC) No 715/2007
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.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the transmission bellhousing (PSA TIS B13580). The 8th VIN digit indicates engine type ('G' for 5GR series). Pre-2014 models have red-painted cam covers with exposed turbocharger; post-2014 units feature revised heat shielding. Critical differentiation from EP6CDT: EP6FDTX has Bosch HDEV5 injectors and Mitsubishi TD04HL-15T turbo, while EP6CDT uses Continental injectors and a different turbo. Service parts require model-year verification - turbo actuators before 2014 are incompatible with later Euro 6b variants due to revised linkage design (PSA SIB 14/1023).
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.
Find answers to most commonly asked questions about CITROEN 5GR-EP6FDTX.
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