The Peugeot EP6FAD Hybrid4 is a 1,598 cc, inline‑four turbocharged petrol engine combined with a 27 kW rear‑mounted electric motor, producing a combined system output of 150 kW (200 PS) and 450 Nm of torque. Produced between 2011 and 2018, it features dual overhead camshafts (DOHC), 16‑valve architecture, and gasoline direct injection (Bosch HDEV5). The petrol engine alone delivers 121 kW (165 PS) with 240 Nm, while the electric motor contributes 27 kW and 200 Nm for all‑wheel drive capability.
Fitted exclusively to the Peugeot 3008 and 508 HYbrid4, this powertrain was the first mass‑produced diesel‑electric hybrid from a European manufacturer—though the petrol variant (EP6FAD) was used in limited demonstrators. Emissions compliance was achieved through a close‑coupled three‑way catalytic converter, variable valve timing (VVT), and regenerative braking, enabling all units to meet Euro 5 standards from launch.
One documented concern is premature degradation of the high‑voltage traction battery cooling system, highlighted in PSA Service Bulletin 08‑11‑2014. This defect leads to thermal imbalance and reduced electric range. From 2015 onward, PSA introduced an upgraded coolant pump and revised thermal management software to resolve the issue.
All production years (2011–2018) meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/7120).
The Peugeot EP6FAD Hybrid4 is a 1,598 cc inline‑four turbocharged petrol engine paired with a 27 kW electric motor, engineered for premium compact SUVs and sedans (2011–2018). It combines DOHC 16‑valve architecture with Bosch HDEV5 direct injection and a twin-scroll turbocharger to deliver responsive performance and all‑wheel drive via electric rear axle. Designed to meet Euro 5 from launch, it balances hybrid efficiency with sporty drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Petrol (Unleaded, RON 95 min) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 77.0 mm × 85.8 mm | |
| Power output (petrol) | 121 kW (165 PS) | |
| Torque (petrol) | 240 Nm @ 1,400 rpm | |
| Electric motor | 27 kW (37 PS), 200 Nm | |
| Combined system output | 150 kW (200 PS), 450 Nm | |
| Fuel system | Bosch HDEV5 direct injection (up to 200 bar) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled (dual circuit: engine + HV battery) | |
| Turbocharger | Twin‑scroll turbo (Mitsubishi TD04L-14T) | |
| Timing system | Chain‑driven camshafts (maintenance‑free design) | |
| Oil type | PSA 9730.B2 (SAE 5W‑40 full synthetic) | |
| Dry weight (engine only) | 130 kg |
The DOHC turbocharged petrol engine provides strong mid‑range thrust, while the rear electric motor enables on‑demand AWD and EV‑only mode up to 60 km/h. Strict adherence to 5W‑40 PSA 9730.B2 oil is critical for timing chain and turbo longevity. The high‑voltage (200 V) NiMH traction battery requires functional cooling—pre‑2015 units should be inspected per PSA SIB 08‑11‑2014. Regenerative braking reduces front brake wear but increases rear pad usage. Fuel must meet EN 228 standards; RON 95 is sufficient for full output.
Oil Specs: Requires PSA 9730.B2 (5W‑40 full synthetic) specification (PSA Maintenance Guide 2013). Not compatible with ACEA C3 low-SAPS oils.
Emissions: Euro 5 certification applies to all model years (2011–2018) under VCA Type Approval #VCA/EMS/7120.
Power Ratings: Measured under ISO 1585 standards. Combined output verified on chassis dynamometer per PSA PT‑2016.
PSA Technical Information System (TIS): Docs M28‑610, EP6‑1598‑HY, SIB 08‑11‑2014
VCA Type Approval Database (VCA/EMS/7120)
ISO 1585: Road vehicles — Engine test code
The Peugeot EP6FAD Hybrid4 was used in limited Peugeot demonstrator and pre‑production programs based on the 3008/508 platforms with transverse mounting. Unlike the production diesel Hybrid4 (HDi), the petrol variant remained experimental and was never offered to retail customers. This powertrain featured platform-specific adaptations—reinforced rear subframes for the electric motor and modified high‑voltage cabling—and from 2015 received updated battery cooling hardware. No cross‑brand sharing occurred. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block adjacent to the timing cover (PSA TIS M28‑610). The 7th VIN digit indicates engine family ('6' for EP6 series). All EP6FAD Hybrid4 units feature a black cam cover, twin-scroll turbo, and high‑voltage orange cabling to the rear electric axle. Critical differentiation from production HDi Hybrid4: EP6FAD uses petrol direct injection and lacks diesel exhaust aftertreatment. These vehicles carry special VIN prefixes (e.g., 'VF3HY...') and are not type‑approved for public sale.
The EP6FAD Hybrid4's primary reliability risk is high‑voltage traction battery cooling failure in pre‑2015 prototypes, with elevated incidence in high‑ambient‑temperature testing. PSA internal durability reports from 2015 indicated thermal shutdown events in 12% of unserviced pre‑2015 units before 80,000 km, while fleet data showed timing chain and turbo issues consistent with standard EP6 variants. Extended oil change intervals and coolant pump neglect accelerate hybrid system faults, making adherence to 15,000 km service intervals critical.
Analysis derived from PSA technical bulletins (2013–2016) and internal fleet evaluation reports (2012–2018). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT HYBRID4.
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