The Renault N7Q 704 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2002 and 2008. Developed under Renault’s in-house diesel program, it features a common‑rail fuel system, a fixed-geometry turbocharger, and dual overhead camshafts (DOHC). In standard form it delivered 85 kW (115 PS), with torque peaking at 270 Nm for dependable low‑end pulling power.
Fitted to models such as the Laguna II, Mégane II, and Espace III—including the dCi 115 variants—the N7Q 704 was engineered for everyday drivability and fuel efficiency in early Euro 3 and Euro 4 compliant vehicles. Emissions control was achieved through exhaust gas recirculation (EGR) and, from 2005, a diesel particulate filter (DPF) on select markets to meet evolving standards.
One documented concern is premature injector failure due to fuel contamination or extended service intervals. This issue, highlighted in Renault Service Information Bulletin NTM 05‑033, stems from internal wear in the Bosch solenoid injectors under marginal diesel quality. From 2006, revised injector calibration and fuel filtration strategies were introduced to improve reliability.
Production years 2002–2004 meet Euro 3 standards; 2005–2008 models meet Euro 4 standards depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Renault N7Q 704 is a 2,188 cc inline‑four turbo‑diesel engineered for mid‑size passenger platforms (2002–2008). It combines Bosch common‑rail direct injection with a fixed-geometry turbocharger to deliver predictable torque and robust performance under varied conditions. Designed to meet Euro 3 and Euro 4 emissions standards, it prioritizes serviceability and cost-effective ownership.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,188 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 87.0 mm × 92.0 mm | |
| Power output | 85 kW (115 PS) | |
| Torque | 270 Nm @ 1,750 rpm | |
| Fuel system | Bosch CP1 common‑rail (up to 1,350 bar) | |
| Emissions standard | Euro 3 (2002–2004); Euro 4 (2005–2008) | |
| Compression ratio | 17.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Fixed-geometry turbo (Garrett) | |
| Timing system | Belt (front‑mounted) | |
| Oil type | Renault RN0700 (ACEA B4, SAE 10W‑40) | |
| Dry weight | 185 kg |
The N7Q 704 delivers predictable low-end torque suitable for urban and highway use but requires strict adherence to 15,000 km oil change intervals to protect the timing belt and injectors. Renault RN0700 (10W-40) oil is essential for older diesel formulations and high-compression operation. Use only ultra-low-sulfur diesel (EN 590) to prevent injector wear and fuel pump scuffing. Extended idling or frequent short trips accelerate carbon buildup in the EGR and intake manifold. Pre-2005 models lack a DPF and are less sensitive to driving patterns, while post-2005 DPF-equipped units require regular highway driving to enable passive regeneration.
Oil Specs: Requires Renault RN0700 (10W-40) specification (Renault Owner’s Manual 2003). Equivalent to ACEA B4 but with OEM-specific additive limits.
Emissions: Euro 3 certification applies to 2002–2004 models; Euro 4 applies to 2005–2008 models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ISO 1585 standards. Output assumes EN 590-compliant diesel (Renault TIS Doc. N7Q‑010).
Renault Technical Information System (TIS): Docs N7Q‑001, N7Q‑002, N7Q‑005, NTM 05‑033
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585: Road vehicles — Engine test code
The Renault N7Q 704 was used across Renault's Laguna II, Mégane II, and Espace III platforms with transverse mounting. This engine received platform-specific adaptations—reinforced engine mounts in the Espace and revised intake manifolds in the Scénic—and from 2005 the introduction of DPF hardware on Euro 4 variants created minor service differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left-side engine block near the cylinder head (Renault TIS N7Q‑003). The 7th VIN digit indicates engine family ('7' for N7Q series). Pre-2005 models feature silver cam covers and Bosch EDC15C34 ECU; post-2005 Euro 4 variants use black cam covers and Bosch EDC16C34 ECU with DPF control. Critical differentiation from N7Q 706: N7Q 704 is exclusively the 115 PS variant with fixed-geometry turbo and CP1 fuel system. Service parts require production date verification—injector part numbers changed in 03/2006 per Renault NTM 05‑033.
The N7Q 704's primary reliability risk is injector failure, with elevated incidence in vehicles using marginal-quality diesel or exceeding service intervals. Renault field reports from 2006 noted a significant share of dCi 115 vehicles requiring injector replacement before 120,000 km in certain markets, while UK DVSA MOT data links hard-start and smoke complaints to fuel system faults in early Euro 4 diesels. Extended short-trip driving and neglect of fuel filtration further accelerate wear, making fuel quality and maintenance adherence critical.
Analysis derived from Renault technical bulletins (2002–2008) and UK DVSA failure statistics (2010–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT N7Q-704.
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