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 su…
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 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.
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.
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The EP6DT offers strong performance but requires disciplined maintenance. Pre-2012 models are prone to turbocharger issues if oil changes are delayed. Later revisions with updated cooling systems show improved reliability. Using correct oil (PSA B71 2290) and avoiding short trips help prevent premature wear. Well-maintained units can exceed 150,000 km without major issues.
Key issues include turbocharger bearing wear (especially pre-2012), high-pressure fuel pump failure, intake valve carbon buildup, and coolant leaks from the thermostat housing. These are documented in PSA service bulletins and supported by field failure data. Regular maintenance and use of quality fuel/oil reduce risk significantly.
The EP6DT was used in the Citroen DS3 (THP 155/200), DS4 (THP 200), and C4 Picasso (THP 155). It was also shared with Peugeot (308 GTI) and MINI (Cooper S R56) under the PSA-BMW joint engine program. Production spanned from 2007 to 2015, primarily in Euro 5-compliant models.
Yes. The EP6DT responds well to ECU remapping, with stage 1 tunes typically adding +30–40 kW. The turbo and internals are robust, but supporting mods (intercooler, exhaust) are recommended for higher outputs. Tuning should be performed by specialists familiar with THP engine dynamics to avoid over-boosting or fueling issues.
In combined driving, expect 7.5–8.5 L/100km (33–38 mpg UK). The DS3 THP 200 averages ~8.0 L/100km in mixed use. Real-world economy depends heavily on driving style—aggressive use can exceed 10 L/100km. Highway cruising is more efficient, often achieving 6.5–7.0 L/100km.
Yes. The EP6DT is an interference engine. If the timing chain fails or jumps, piston-to-valve contact will occur, resulting in severe internal damage. While the chain is designed for life, any abnormal noise from the front of the engine should be investigated immediately to prevent catastrophic failure.
PSA specifies SAE 5W-30 oil meeting PSA B71 2290 standard. This synthetic oil ensures proper turbocharger lubrication and protects against high-temperature coking. Oil changes should be performed every 15,000 km or annually, whichever comes first, to maintain engine longevity.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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