The Citroën 5GM (EP6FDTX) is a 1,598 cc, inline-four turbocharged petrol engine produced between 2010 and 2018. It forms part of the PSA-Renault HFV (High Fuel Value) engine family, co-developed with BMW for use in compact and mid-size platforms. Featuring direct fuel injection (GDI), variable valve timing (VVT), and twin-scroll turbocharging, it delivers 147 kW (200 PS) and 275 Nm of torque, enabling strong mid-range performance for sport-oriented trims like the DS3 Racing and C4 Picasso Bi-Turbo.
Fitted to models such as the DS3, DS4, C4, and C4 Picasso, the EP6FDTX was engineered for dynamic driving character with improved throttle response and reduced turbo lag. 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 compact design and transverse mounting enabled optimal front axle weight distribution.
One documented concern is premature turbocharger bearing wear, particularly under aggressive driving or extended oil change intervals. This issue, referenced in PSA Service Information Bulletin SIB-ENG-2013-08, is linked to oil coking in the turbocharger center housing under sustained high load. From 2015, PSA introduced revised oil cooling pathways and updated turbocharger hardware (Garrett GT1544L) to improve thermal management and durability.
Production years 2010–2018 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Citroën 5GM (EP6FDTX) is a 1,598 cc inline-four turbocharged petrol engine engineered for premium compact models (2010–2018). It combines gasoline direct injection with a twin-scroll turbocharger to deliver responsive mid-range power and sporty driving dynamics. Designed to meet Euro 5 standards, it balances performance with acceptable fuel economy for its class.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Petrol (Unleaded, 95 RON min) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (twin-scroll) | |
| Bore × stroke | 77.0 mm × 85.8 mm | |
| Power output | 147 kW (200 PS) @ 5,500 rpm | |
| Torque | 275 Nm @ 1,900–4,500 rpm | |
| Fuel system | Bosch HDEV5 direct injection (up to 200 bar) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water-cooled, electric thermostat | |
| Turbocharger | Garrett GT1544L (variable nozzle turbine) | |
| Timing system | Timing chain (DOHC, dual VVT) | |
| Oil type | Total Quartz INEO ECS 5W-30 | |
| Dry weight | 128 kg |
The twin-scroll turbo provides strong mid-range pull ideal for spirited driving but requires adherence to 15,000 km oil change intervals using PSA-approved 5W-30 to prevent turbo bearing coking and timing chain wear. Total Quartz INEO ECS 5W-30 oil is critical due to its high-temperature stability and compatibility with the GDI system. Aggressive driving without adequate cool-down periods increases turbocharger stress. The Bosch HDEV5 fuel pump is sensitive to low-octane fuel, risking pre-ignition and long-term valve recession. Post-2015 models feature improved oil cooling; pre-2015 units benefit from aftermarket oil temperature monitoring. Regular intake decarbonisation is advised to maintain airflow and prevent lean conditions.
Oil Specs: Requires Total Quartz INEO ECS 5W-30 specification (PSA SIB-ENG-2013-08). Meets ACEA C3 and PSA B71 2290.
Emissions: Euro 5 certification applies to all models (2010–2018) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ECE R85 standards. 147 kW output requires 98 RON fuel for sustained performance (PSA TIS Doc. E6FDTX-PERF-01).
PSA Technical Information System (TIS): Docs E6FDTX-001, E6FDTX-002, SIB-ENG-2013-08
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585:1996 Road vehicles — Test code for net power
The Citroën 5GM (EP6FDTX) was used across Citroën's PF2/PF3 platforms with transverse mounting and shared with Peugeot and DS Automobiles. This engine received platform-specific adaptations-shorter intake manifolds in the DS3 and revised torque mounts in the C4 Picasso-and from 2015 received updated turbocharger cooling circuits, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block, near the timing cover (PSA TIS E6FDTX-ID-01). The 8th VIN digit indicates engine type ('K' for EP6FDTX). Pre-2015 models have silver cam covers with black plastic intake manifolds; post-2015 units use gloss black cam covers. Critical differentiation from EP6CDT: EP6FDTX features a Garrett GT1544L turbo with VNT actuator and lacks the secondary turbocharger. Service parts require model-year verification—turbocharger gaskets and oil feed lines differ pre- and post-2015 due to revised cooling layout (PSA SIB-ENG-2013-08).
The EP6FDTX's primary reliability risk is turbocharger bearing wear, with elevated incidence in high-performance or short-trip usage. PSA internal quality reports from 2014 indicated a significant number of pre-2015 units required turbo replacement before 100,000 km, while UK DVSA MOT records show increased catalytic converter failures linked to oil consumption in neglected engines. Frequent high-load operation without cool-down cycles increases thermal stress, making oil quality and service adherence critical.
Analysis derived from PSA technical bulletins (2010–2018) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN 5GM-EP6FDTX.
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