The Citroen 5FR (EP6DT) is a 1,598 cc, inline-four turbocharged petrol engine developed by PSA Group in partnership with BMW, produced between 2007 and 2015. It features direct fuel injection (THP), variable valve timing (VVT), and twin-scroll turbocharging. In standard applications it delivers 147 kW (200 PS), with peak torque of 275 Nm available from 1,900 rpm, providing strong mid-range performance for compact and performance-oriented models.
Fitted to models such as the Citroen C4 Picasso, DS3, and DS4, the EP6DT was engineered for responsive urban and highway driving with a 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 compact design and transverse mounting made it ideal for front-wheel-drive platforms in the B- and C-segment.
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-018-12, is linked to oil coking in the turbocharger center housing under sustained high-temperature operation. From 2012, revised oil cooler routing and updated turbocharger designs were introduced to improve thermal management and reliability.
Production years 2007–2015 meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Citroen 5FR (EP6DT) is a 1,598 cc inline-four turbocharged petrol engine engineered for compact and premium hatchbacks (2007–2015). It combines direct fuel injection (THP) with a twin-scroll turbocharger to deliver responsive mid-range acceleration and refined performance. Designed to meet Euro 5 standards, it balances sporty driving dynamics with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Petrol | |
| 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 | Direct injection (THP, up to 150 bar) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Mitsubishi TD04HL-15T twin-scroll | |
| Timing system | Timing chain (DOHC) | |
| Oil type | PSA B71 2290 (SAE 5W-30) | |
| Dry weight | 122 kg |
The twin-scroll turbo provides strong low-end torque ideal for city driving but requires strict adherence to 15,000 km oil change intervals using PSA B71 2290 (5W-30) oil to prevent turbo bearing coking and premature wear. Cold-start idling for 10–15 seconds is recommended to establish oil pressure before driving. The direct injection system is prone to intake valve deposits; periodic walnut blasting is advised. Post-2012 models benefit from improved oil cooling and revised turbo housings. Emissions systems require regular lambda sensor checks to prevent fault codes and reduced performance.
Oil Specs: Requires PSA B71 2290 (5W-30) specification (PSA SIB-ENG-018-12). Supersedes ACEA A3/B4.
Emissions: Euro 5 certification applies to all models (2007–2015) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ISO 1585 standards. 147 kW output requires 98 RON fuel for optimal performance (PSA TIS Doc. B32010).
PSA Technical Information System (TIS): Docs B31500, B31720, B31801, SIB-ENG-018-12
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585 Road vehicles — Test method for the measurement of fuel consumption
The Citroen 5FR (EP6DT) was used across Citroen's C3/DS platforms with transverse mounting and shared with Peugeot and MINI under joint development agreements. This engine received platform-specific calibrations-adapted throttle response in the DS3 and revised torque delivery in the C4 Picasso-and from 2012 the updated DS4 adopted a revised turbocharger and cooling circuit, 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 B31500). The 8th VIN digit indicates engine type ('F' for EP6 series). Pre-2012 models use a silver turbocharger housing; post-2012 units feature a black heat-shielded housing. Critical differentiation from EP6DTS: EP6DT uses a single turbo (Mitsubishi TD04HL-15T), while EP6DTS uses a twin-turbo setup. Service parts require model-year verification—turbo and intercooler assemblies for pre-2012 models are not compatible with later revisions due to routing changes (PSA SIB-ENG-018-12).
The EP6DT's primary reliability risk is turbocharger bearing wear, with elevated incidence in urban and aggressive driving. Internal PSA field reports from 2013 indicated a significant number of pre-2012 units required turbo replacement before 100,000 km, while UK DVSA data links a portion of emissions-related failures to lambda sensor degradation. Short trips and delayed oil changes increase thermal stress, making oil quality and interval adherence critical.
Analysis derived from PSA technical bulletins (2010–2015) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN 5FR-EP6DT.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with CITROEN or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
CITROEN Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
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.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialCITROEN documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
