The Peugeot AHX (DW10FCD) is a 1,997 cc, inline‑four turbo‑diesel engine produced between 2010 and 2018. It features a high — pressure common — rail fuel system, a variable geometry turbocharger (VGT), and double overhead camshafts (DOHC). In standard form, it delivered 120 kW (163 PS) and 340 Nm of torque, engineered for responsive performance paired with efficient cruising.
Fitted to models such as the 308 II, 508 I, and 3008 I, the AHX was designed for drivers seeking a re…
Production years 2010–2018 meet Euro 5 standards .
The Peugeot AHX (DW10FCD) is a 1,997 cc inline‑four turbo‑diesel engineered for compact and mid‑size models (2010-2018). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong low‑rpm torque and efficient cruising. Designed to meet Euro 5 standards, it balances everyday performance with economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,997 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 85.0 mm × 88.0 mm | |
Power output | 120 kW (163 PS) | |
Torque | 340 Nm @ 2,000 rpm | |
Fuel system | Bosch CP4 common‑rail (up to 1,800 bar) | |
Emissions standard | Euro 5 | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Honeywell) | |
Timing system | Chain-driven | |
Oil type | Peugeot B71 2290 (SAE 5W‑30) | |
Dry weight | 165 kg |
The Peugeot AHX (DW10FCD) was used across Peugeot's PF2/PF3 platforms with transverse mounting. This engine received platform-specific adaptations-reinforced mounts in the 508 and specific ECU calibrations for the 3008-with no major facelift revisions affecting core compatibility. All adaptations are documented in OEM technical bulletins.
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The AHX's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel. Peugeot service data indicates a notable failure rate before 150,000 km in affected batches, while owner reports frequently cite fuel system faults as a cause for breakdowns. Extended service intervals and contaminated fuel make using correct diesel and adhering to maintenance schedules 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 AHX offers good performance and efficiency, but its long-term reliability hinges on fuel quality and maintenance. The high-pressure fuel pump is its primary weakness, especially in early models. Using premium low-sulfur diesel and adhering strictly to service intervals greatly improves longevity. Later models with revised pumps are more robust.
The most frequent issues are high-pressure fuel pump failure, EGR valve/carbon buildup, DPF regeneration problems, and turbo actuator faults. These are well-documented in Peugeot service bulletins and commonly reported by owners. Fuel quality is a major contributing factor to pump and DPF issues.
The AHX engine was primarily used in the second-generation 308 (2013-2018), facelifted first-generation 508 (2014-2018), and the first-generation 3008 (2013-2016). It was also shared with Citroën models like the C4 Picasso II. All applications were Euro 5 compliant.
Aftermarket ECU tuning is common on the AHX-DW10FCD 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 very good. In a 308 II, expect combined figures around 4.5 L/100km (63 mpg UK). The 508, being heavier, typically returns around 5.0 L/100km (56 mpg UK). Real-world economy depends heavily on driving style and DPF regeneration cycles.
Yes. The AHX is an interference engine. If the timing chain were to fail or jump, the pistons would collide with the open valves, causing catastrophic internal engine damage. Fortunately, the chain is generally very durable with proper maintenance.
Peugeot mandates the use of B71 2290 specification oil, typically a 5W-30 low-SAPS (low ash) synthetic. This is critical for protecting the DPF and ensuring proper lubrication. Using the wrong oil can lead to DPF clogging and increased engine wear.
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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