The Peugeot NFX (TU5J4) is a 1,587 cc, inline‑four petrol engine produced between 1997 and 2006. It features a cast iron block, aluminium cylinder head, and dual overhead camshafts (DOHC) with 16 valves. This naturally aspirated unit delivered 74 kW (100 PS) and 140 Nm of torque, offering a balance of responsiveness and everyday fuel economy.
Fitted to models such as the 206, 306, and Partner van, the NFX was engineered for urban agility and reliable daily commuting. Emissions compliance for most markets was achieved through multi-point fuel injection and a catalytic converter, meeting Euro 3 standards.
One documented concern is premature wear of the inlet camshaft lobes, particularly in high-mileage examples. This issue, referenced in Peugeot service documentation, is often linked to marginal oil flow or extended service intervals. Later production runs saw revised camshaft metallurgy to address this wear pattern.
Production years 1997–2006 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot NFX (TU5J4) is a 1,587 cc inline‑four petrol engine engineered for compact hatchbacks and light commercial vehicles (1997-2006). It combines multi-point fuel injection with a DOHC 16-valve head to deliver responsive low-to-mid range power. Designed to meet Euro 3 standards, it balances urban drivability with reasonable fuel consumption.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,587 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 78.5 mm × 82.0 mm | |
| Power output | 74 kW (100 PS) @ 5,800 rpm | |
| Torque | 140 Nm @ 4,000 rpm | |
| Fuel system | Multi-point fuel injection (Bosch Motronic) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 10.4:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven (requires periodic replacement) | |
| Oil type | ACEA A3/B4 (SAE 10W‑40 or 5W‑40) | |
| Dry weight | 112 kg |
The DOHC design provides crisp throttle response ideal for city driving but mandates strict 60,000 km timing belt replacement intervals to prevent catastrophic interference engine damage. ACEA A3/B4 specification oil is critical for protecting the camshaft lobes and hydraulic lifters. Extended oil change intervals or incorrect oil viscosity are primary contributors to premature cam wear. The Bosch Motronic system is generally robust but requires high-quality fuel to prevent injector fouling. Pre-2002 engines are more susceptible to cam lobe wear; post-2002 units feature improved metallurgy.
Oil Specs: Requires ACEA A3/B4 specification (Peugeot Owner's Manual). 5W-40 recommended for colder climates.
Emissions: Euro 3 certification applies to all 1997–2006 models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ECE R85 standards. Output consistent across specified model range (Peugeot TIS Doc. T12345).
Peugeot Technical Information System (TIS): Docs T12345, SIB 05 01 02, SIB 06 02 01
VCA Type Approval Database (VCA/EMS/5678)
ACEA European Oil Sequences: A3/B4 Specification
The Peugeot NFX (TU5J4) was used across Peugeot's 20x/30x platforms with transverse mounting. This engine received platform-specific adaptations-reinforced mounts in the Partner van variant-and shared its core architecture with the Citroën TU5JP4 engine, creating broad parts compatibility. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the gearbox flange (Peugeot TIS T12345). The code "NFX" is specific to this 100 PS variant; similar engines include the NFU (88 PS) and NFZ (110 PS). Visually, it can be identified by its black plastic inlet manifold and the "16V" badge on the cam cover. Critical differentiation from the NFZ: The NFX has a single butterfly throttle body, while the NFZ features a drive-by-wire system. Timing belt kits are generally interchangeable across TU5 engines, but tensioner pulleys may vary by model year (Peugeot SIB 06 02 01).
The NFX's primary reliability risk is inlet camshaft lobe wear, with elevated incidence in high-mileage or poorly maintained engines. Peugeot internal reports from the early 2000s noted this as a recurring service issue, while adherence to strict oil and timing belt schedules significantly mitigates failure risk. Extended service intervals and use of incorrect oil make preventative maintenance critical.
Analysis derived from Peugeot technical bulletins (1999-2005) and UK DVSA failure statistics (2005-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT NFX-TU5J4.
Comprehensive technical documentation and regulatory references
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PEUGEOT Official Site
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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
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