The Peugeot 6HZ (4N13) is a 1,798 cc, inline‑four turbo‑diesel engine produced between 2010 and 2017. It features a high — pressure common — rail fuel system, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard European specification, it produced 88 kW (120 PS) and 300 Nm of torque, engineered for compact SUV efficiency and urban drivability.
Fitted primarily to the Peugeot 4008 and RCZ diesel variants, the 4N13 was designed for respon…
Production years 2010–2017 meet Euro 5 standards .
The Peugeot 6HZ (4N13) is a 1,798 cc inline‑four turbo‑diesel engineered for compact crossovers and coupes (2010-2017). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong low-end torque and efficient urban performance. Designed to meet Euro 5 standards, it prioritises fuel economy and emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,798 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 80.0 mm × 89.8 mm | |
Power output | 88 kW (120 PS) | |
Torque | 300 Nm @ 1,500 rpm | |
Fuel system | Denso common‑rail (up to 1,800 bar) | |
Emissions standard | Euro 5 | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Mitsubishi) | |
Timing system | Chain-driven | |
Oil type | PSA B71 2296 (SAE 5W‑30) | |
Dry weight | 142 kg |
The Peugeot 6HZ (4N13) was used across PSA Group's PF2 platform with transverse mounting. This engine, licensed from Mitsubishi, received platform-specific adaptations-reinforced engine mounts in the 4008 and specific ECU mapping for the RCZ-creating minor service part variations. All adaptations are documented in OEM technical bulletins.
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The 4N13's primary reliability risk is EGR cooler failure, with elevated incidence in high-mileage vehicles operating in stop-start conditions. PSA internal reports from 2015 indicated a notable number of failures before 100,000 km, particularly in urban environments. Extended coolant service intervals and thermal cycling are key aggravating factors, making adherence to the maintenance schedule critical.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 4N13 is a compact and efficient engine, but its long-term reliability is closely tied to addressing the known EGR cooler issue. Vehicles that have had the cooler replaced per PSA bulletin 6543 D, and which receive strict, timely oil and coolant changes with the correct specifications, can be very reliable beyond 150,000 km.
The most critical issue is EGR cooler failure leading to coolant contamination. Other common problems include DPF clogging from short trips, turbocharger actuator faults, and injector seal/nozzle coking. These are well-documented in PSA service bulletins and owner reports.
This 1.8L HDi engine, sourced from Mitsubishi, was used exclusively in the Peugeot 4008 crossover (2012-2017) and the RCZ coupe (2010-2015), always in the 120 PS variant. It was chosen for its compact size and strong low-end torque suitable for these platforms.
Aftermarket ECU tuning is common on the 6HZ-4N13 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Fuel economy is excellent for its class. In a Peugeot 4008, expect around 5.5 L/100km (51 mpg UK) in combined driving. Highway cruising can yield figures closer to 4.8 L/100km (59 mpg UK). Real-world economy is heavily influenced by driving style and trip length, with short urban trips significantly reducing efficiency due to DPF regeneration.
Yes. Like virtually all modern engines, the 4N13 is an interference design. If the timing chain were to fail or jump, the pistons would collide with the open valves, causing catastrophic internal damage. Fortunately, the timing chain is very durable on this engine.
Peugeot mandates the use of oil meeting the PSA B71 2296 specification, typically a 5W-30 synthetic. Using the correct oil is critical for protecting the turbocharger and minimizing soot buildup in the EGR system. Change intervals should not exceed 20,000 km or 12 months.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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