The Peugeot 5FY (EP6DTS) is a 1,598 cc, inline‑four turbocharged petrol engine produced between 2007 and 2015. It features dual overhead camshafts (DOHC), 16 valves, and gasoline direct injection. This engine delivered 147 kW (200 PS) and 275 Nm of torque, with its twin — scroll turbocharger enabling strong, sustained power delivery for spirited driving.
Fitted primarily to the Peugeot 308 GTI, RCZ, and Citroën DS3 Racing, the 5FY was engineered for high performance and…
Production years 2007–2015 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/8901).
The Peugeot 5FY (EP6DTS) is a 1,598 cc inline‑four turbocharged petrol engine engineered for high-performance compact coupes and hatchbacks (2007-2015). It combines direct fuel injection with a twin-scroll turbocharger to deliver strong, linear power and responsive acceleration. Designed to meet Euro 5 standards, it balances high performance with acceptable emissions for its class.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 77.0 mm × 85.8 mm | |
Power output | 147 kW (200 PS) @ 5,500 rpm | |
Torque | 275 Nm @ 1,900 rpm | |
Fuel system | Gasoline direct injection (Bosch) | |
Emissions standard | Euro 5 | |
Compression ratio | 9.2:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Twin-scroll turbo (Mitsubishi Heavy Industries) | |
Timing system | Chain-driven | |
Oil type | PSA B71 2290 (SAE 5W‑40) | |
Dry weight | 120 kg |
The Peugeot 5FY (EP6DTS) was used across PSA Group's high-performance compact platforms with transverse mounting. This engine received minimal platform-specific adaptations and was shared directly between Peugeot and Citroën performance models. All adaptations are documented in OEM technical bulletins.
The 5FY (EP6DTS)'s primary reliability risk is timing chain tensioner failure, with elevated incidence in vehicles with extended oil change intervals. PSA internal data indicates a notable number of tensioner replacements before 100,000 km, while turbocharger wastegate issues become a concern after 120,000 km. Neglecting oil changes and using incorrect viscosity make chain component failure highly probable.
Analysis derived from PSA technical bulletins (2007-2015) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 5FY engine is powerful and generally robust, but its Achilles' heel is the timing chain tensioner, which is sensitive to oil quality and change intervals. With strict adherence to using PSA B71 2290 oil and changing it every 15,000 km, the engine can be very reliable. Neglecting this will almost certainly lead to expensive timing chain repairs. Turbo and fuel pump issues are also common if maintenance is deferred.
The most frequent issues are timing chain tensioner failure, turbocharger wastegate actuator faults, high-pressure fuel pump failure, and carbon buildup on intake valves. These are well-documented in PSA service bulletins and owner reports. The timing chain issue is the most critical, as it can lead to complete engine destruction.
The 5FY (EP6DTS) 1.6L turbo petrol engine was used in the high-performance Peugeot 308 GTI (2010-2015) and RCZ (2009-2015). It was also fitted to the Citroën DS3 Racing (2010-2015). It was not used in standard, non-performance Peugeot models, which used lower-powered variants of the EP6 engine.
Yes, it is a very popular engine for tuning. ECU remaps can safely increase power to 170-180 kW (230-240 PS) and torque to 300-320 Nm. The stock internals are generally strong enough to handle this. More substantial gains require upgraded turbos, intercoolers, and injectors. Many owners report excellent results with stage 1 and stage 2 tunes.
Fuel economy is typical for a high-performance 1.6L turbo engine. Expect around 10.5 L/100km (27 mpg UK) in city driving and 6.5 L/100km (43 mpg UK) on the highway. Combined figures are usually around 8.0-8.5 L/100km (33-35 mpg UK), heavily dependent on driving style. Aggressive driving will significantly increase consumption.
Yes. The 5FY (EP6DTS) is an interference engine. If the timing chain were to fail or jump significantly, the pistons would collide with the open valves, causing catastrophic internal engine damage. This underscores the critical importance of addressing any timing chain rattle immediately.
Peugeot mandates the use of oil meeting the PSA B71 2290 specification, typically a 5W-40 synthetic. Using the correct oil is absolutely critical for the longevity of the timing chain tensioner and turbocharger. ACEA A3/B4 is the minimum acceptable industry standard if the PSA-specific oil is unavailable.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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