The Citroën NFP, internally designated EC5, is a 1,397 cc, inline — four petrol engine produced between 2004 and 2011. It belongs to the PSA — EuroPower EC engine family, featuring a DOHC 16 — valve configuration and multi — point fuel injection (MPFI). Delivering 74 kW (101 PS), it was engineered for responsive urban performance and improved efficiency over earlier TU — series engines.
Fitted to models such as the C4, C4 Picasso, and C5, the NFP (EC5) was designed for drivers s…
All production years 2004–2011 meet Euro 4 emissions standards (VCA UK Type Approval #VCA/EMS/6210).
The Citroën NFP (EC5) is a 1,397 cc inline-four petrol engine designed for compact and mid-size passenger vehicles (2004–2011). It features a 16-valve DOHC valvetrain and sequential MPFI to deliver smooth power delivery and improved fuel efficiency. Engineered to meet Euro 4 standards, it balances drivability with environmental compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,397 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 78.5 mm × 72.0 mm | |
Power output | 74 kW (101 PS) @ 6,000 rpm | |
Torque | 136 Nm @ 4,000 rpm | |
Fuel system | Sequential multi-point fuel injection (SMPFI) | |
Emissions standard | Euro 4 | |
Compression ratio | 10.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Timing belt (DOHC, front-mounted) | |
Oil type | Total Quartz 9000 5W-40 (ACEA A3/B4) | |
Dry weight | 106 kg |
The Citroën NFP (EC5) was used across Citroën's C4/C5 platforms with transverse mounting and shared with Peugeot under internal PSA engineering agreements. This engine received model-specific calibrations-adapted throttle response in the C4 Picasso and revised intake manifolds in the C5-and from 2007 the updated engine management software created service part distinctions. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
The NFP (EC5)'s primary reliability risk is timing belt failure due to missed service intervals, with elevated incidence in high-mileage applications. PSA internal reports from 2009 noted increased failure rates in units exceeding 160,000 km without belt replacement, while UK DVSA records show valve train faults as a leading cause of MOT failure for pre-2012 petrol engines. Extended oil change intervals and poor fuel quality accelerate wear, making adherence to maintenance schedules critical.
Analysis derived from PSA technical bulletins (2004-2011) and UK DVSA failure statistics (2005-2015). 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 NFP (EC5) is mechanically sound and durable when maintained properly. Its DOHC 16-valve design and hydraulic tappets reduce maintenance needs compared to older TU engines. However, strict adherence to the 150,000 km or 5-year timing belt replacement is essential to prevent engine damage. With regular oil changes and basic servicing, these engines can exceed 200,000 km.
Key issues include timing belt failure if intervals are missed, intake valve carbon buildup, idle instability from throttle body deposits, and coolant leaks from the thermostat housing. These are well-documented in PSA service bulletins. Using incorrect oil or extended service intervals increases risk of premature wear and performance issues.
The NFP (EC5) 1.4i 16v was used in the Citroën C4 (2004–2010), C4 Picasso (2007–2011), and C5 (2004–2008). It was also shared with the Peugeot 307. All applications meet Euro 4 emissions standards. The engine is identifiable by its 16-valve DOHC layout and front-mounted timing belt. It replaced the older 8-valve TU3A unit.
Limited tuning potential exists due to its naturally aspirated design. Intake and exhaust upgrades can yield minor gains, but the engine's compression and MPFI system restrict headroom. ECU remaps are rare and offer minimal benefit. Most owners focus on reliability and economy rather than performance. Aggressive tuning is not recommended due to the engine's modest build quality and lack of forced induction.
Good for its class. In a Citroën C4 1.4i 16v, expect ~7.8 L/100km (city), ~5.4 L/100km (highway), or approximately 36 mpg UK combined. Real-world consumption typically ranges from 32–40 mpg UK depending on driving style. Its responsive nature makes it suitable for mixed driving, though economy suffers with aggressive throttle use.
Yes. The NFP (EC5) is an interference engine. If the timing belt fails or jumps, the pistons can collide with open valves, causing bent valves or piston damage. This makes strict adherence to the 150,000 km or 5-year replacement interval absolutely critical. Any signs of belt wear or tensioner failure should be addressed immediately.
PSA specifies a 5W-40 synthetic or semi-synthetic oil meeting ACEA A3/B4 standards, such as Total Quartz 9000 5W-40. This viscosity supports the hydraulic tappet system and provides adequate protection under normal and high-load conditions. Oil should be changed every 15,000 km or 12 months to ensure proper lubrication and prevent sludge buildup.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
CITROEN Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.