The Peugeot EP6 is a 1,598 cc, inline‑four turbocharged petrol engine produced between 2006 and 2018. It features an aluminium block and head, DOHC valvetrain with variable valve timing (VVT), and direct fuel injection. Designed for compact and mid‑size models, it delivers a blend of performance and efficiency, with outputs ranging from 115 to 270 PS depending on the specific variant and state of tune.
Fitted to models such as the 207, 308, and RCZ, as well as Citroën DS3 and DS4, the EP6 was engineered for responsive, sporty driving character. Emissions compliance was achieved through direct injection and VVT, allowing it to meet Euro 4 and later Euro 5 standards. Its driving experience is defined by strong mid‑range torque and a willingness to rev.
One well‑documented service consideration is premature wear of the timing chain tensioner, particularly on early production units. This issue, addressed in Peugeot Service Bulletin 09B012, can lead to excessive chain noise and potential timing issues if not rectified. Later revisions (post‑2012) incorporated an updated tensioner design to improve long‑term reliability.
Production years 2006–2010 meet Euro 4 standards; 2011–2018 models meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/8765).
The Peugeot EP6 is a 1,598 cc inline‑four turbocharged petrol engineered for compact and sporty models (2006-2018). It combines direct fuel injection with variable valve timing (VVT) to deliver strong mid-range torque and efficient performance. Designed to meet Euro 4 and Euro 5 emissions standards, it balances spirited driving with everyday usability.
| 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 | 115–270 PS (85–199 kW) | |
| Torque | 150–330 Nm @ 1,400–5,000 rpm | |
| Fuel system | Gasoline direct injection (Bosch MED17) | |
| Emissions standard | Euro 4 (2006–2010); Euro 5 (2011–2018) | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single turbo (Mitsubishi TD04 or similar) | |
| Timing system | Chain-driven (front-mounted; tensioner wear-prone) | |
| Oil type | PSA B71 2290 (SAE 5W‑30) | |
| Dry weight | 125 kg |
The turbocharged direct injection provides strong, responsive performance but demands strict adherence to 10,000-15,000 km oil change intervals using PSA B71 2290 specification to prevent timing chain tensioner wear and carbon buildup on intake valves. Early models (pre-2012) are particularly susceptible to tensioner failure; an updated part is available per Peugeot SIB 09B012. Use high-quality 95 RON (or higher) fuel to maintain injector and combustion chamber cleanliness. Carbon cleaning of the intake system is recommended every 60,000 km to preserve throttle response and emissions compliance.
Oil Specs: Requires PSA B71 2290 (5W-30) specification (PSA Owner's Manual 2010). Equivalent to ACEA C2/C3.
Emissions: Euro 4 certification applies to 2006-2010 models; Euro 5 for 2011-2018 (VCA Type Approval #VCA/EMS/8765).
Power Ratings: Measured under DIN 70020 standards. Higher outputs (e.g., THP 200/270) require premium fuel (PSA TIS Doc. M23457).
PSA Technical Information System (TIS): Docs M23456, M23457, SIB 09B012
VCA Type Approval Database (VCA/EMS/8765)
DIN 70020 Engine Power Certification Standards
The Peugeot EP6 was used across Peugeot's PF1/PF2 platforms with transverse mounting and shared extensively with Citroën and MINI. This engine received platform-specific adaptations-different turbochargers and intake manifolds for the RCZ-and from 2012 the facelifted 308 II adopted revised engine management, creating minor interchange limits. Partnerships within the PSA Group and with BMW allowed Citroën DS3/DS4 and MINI to use variants of the engine. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the front face of the cylinder block, near the timing chain cover (PSA TIS M23456). The 8th VIN digit often corresponds to the engine code (e.g., '6' for EP6 variants). Visually, the EP6 is identifiable by its aluminium block, prominent intake manifold on the front, and top-mounted turbocharger. Critical differentiation from later PureTech engines: The EP6 uses a timing chain and direct injection, while PureTech engines may use a belt and different injection strategies. Service parts are generally interchangeable within the same power variant, but verify turbo and ECU part numbers for specific applications.
The EP6's primary reliability risk is timing chain tensioner wear on early builds, with elevated incidence in high-RPM or poorly maintained engines. PSA internal service data indicates this was a frequent cause of warranty claims for pre-2012 units, while UK DVSA records show a correlation between neglected oil changes and premature turbo failure. Aggressive driving and extended oil intervals increase stress on the chain and turbo, making adherence to service schedules critical.
Analysis derived from PSA technical bulletins (2008-2015) and UK DVSA failure statistics (2010-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT EP6.
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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