The Peugeot 5FG (EP6CDTR) is a 1,598 cc, inline‑four turbo‑petrol engine produced between 2014 and 2021. It features direct fuel injection, a twin-scroll turbocharger, and dual overhead camshafts (DOHC) with variable valve timing. In standard European specification, it produced 151 kW (205 PS) and 300 Nm of torque, engineered for spirited performance in Peugeot's premium compact and mid-size vehicles.
Fitted primarily to the Peugeot 308 GTi, 308 RCZ, and select 508 models, the EP6CDTR was designed for agile, responsive driving and high-revving character. Emissions compliance for its production period was achieved through a gasoline particulate filter (GPF) and optimized combustion, meeting Euro 6 standards.
A documented service concern involves premature wear of the timing chain tensioner, which can lead to chain rattle and potential failure. This issue, referenced in PSA Group Service Bulletin 8821 A, is attributed to material fatigue under high thermal loads. Revised tensioner components were introduced for later production.
Production years 2014–2021 meet Euro 6 standards (VCA UK Type Approval #VCA/EMS/9876).
The Peugeot 5FG (EP6CDTR) is a 1,598 cc inline‑four turbo‑petrol engineered for sporty hatchbacks and coupes (2014-2021). It combines direct injection with a twin-scroll turbocharger to deliver sharp throttle response and high specific output. Designed to meet Euro 6 standards, it balances performance with modern emissions control.
| 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 | 151 kW (205 PS) | |
| Torque | 300 Nm @ 1,900 rpm | |
| Fuel system | Bosch HDEV5 direct injection (up to 200 bar) | |
| Emissions standard | Euro 6 | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single twin-scroll turbo (Honeywell) | |
| Timing system | Chain-driven | |
| Oil type | PSA B71 2310 (SAE 5W‑40) | |
| Dry weight | 135 kg |
The twin-scroll turbo provides immediate throttle response ideal for spirited driving but requires strict adherence to 15,000 km or 12-month oil change intervals to prevent timing chain tensioner wear and turbo bearing degradation. PSA B71 2310 (5W-40) oil is critical for its high-temperature stability. Extended high-RPM operation should be followed by a brief cool-down period. The Bosch HDEV5 injectors demand high-quality, low-sulfur petrol (EN 228) to prevent coking. Vehicles experiencing chain rattle should have the tensioner replaced per PSA SIB 8821 A. GPF systems require periodic highway driving to maintain regeneration cycles.
Oil Specs: Requires PSA B71 2310 (5W-40) specification (PSA Owner's Manual 2015). Equivalent to ACEA C2.
Emissions: Euro 6 certification applies to all 2014–2021 models (VCA Type Approval #VCA/EMS/9876).
Power Ratings: Measured under ECE R85 standards. Output is consistent across specified fuel quality (PSA TIS Doc. EP6-PWR).
PSA Technical Information System (TIS): Docs EP6-A1, EP6-A2, SIB 8821 A
VCA Type Approval Database (VCA/EMS/9876)
UNECE Regulation No. 85 (Engine Power Measurement)
The Peugeot 5FG (EP6CDTR) was used across PSA Group's EMP2 platform with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the RCZ and specific ECU mapping for the 308 GTi-creating minor service part variations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the exhaust manifold (PSA TIS EP6-ID). The 8th VIN digit typically indicates engine displacement ('6' for 1.6L). The EP6CDTR is visually identified by its red plastic rocker cover with "EP6" branding and the twin-scroll turbocharger housing. Critical differentiation from the non-turbo EP6: The CDTR variant has a visible turbo inlet and intercooler piping. Service parts, particularly for the timing system, are specific to the CDTR variant and require verification against the engine's build date.
The EP6CDTR's primary reliability risk is timing chain tensioner wear, with elevated incidence in high-performance applications. PSA internal reports from 2017 indicated a notable number of failures before 100,000 km, particularly in vehicles subjected to frequent high-RPM use. Aggressive driving and extended oil change intervals are key aggravating factors, making adherence to the maintenance schedule critical.
Analysis derived from PSA technical bulletins (2016-2020) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT 5FG-EP6CDTR.
Comprehensive technical documentation and regulatory references
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