The Renault 841 725 is a 1,870 cc, inline‑four turbo‑diesel engine produced between 2001 and 2006. It features a common-rail direct injection system with a variable geometry turbocharger (VGT) and a double overhead camshaft (DOHC) design. This iteration delivered 81 kW (110 PS) and 240 Nm of torque, offering a significant step up in refinement and responsiveness from its predecessor.
Fitted to the Renault Trafic II (Phase 1) van and its badge-engineered counterparts like the Opel/Vauxhall Vivaro B and Nissan Primastar, the 841 725 was engineered for improved fuel efficiency and lower emissions while maintaining robust load-carrying capability. Emissions compliance for its production period was met through an exhaust gas recirculation (EGR) system and a diesel particulate filter (DPF), aligning with Euro 3 standards.
A documented service concern involves premature wear of the dual-mass flywheel, which can manifest as drivetrain shudder or noise. This is referenced in Renault Service Note MEC‑089. The issue is often linked to the high torque output and frequent stop-start cycles inherent in commercial vehicle use.
Production years 2001–2006 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/6789).
The Renault 841 725 is a 1,870 cc inline‑four turbo‑diesel engineered for light commercial vehicles (2001-2006). It combines a high-pressure common-rail fuel system with a variable geometry turbocharger to deliver strong, linear power and improved fuel economy. Designed to meet Euro 3 standards, it represents a significant technological advancement over the previous generation.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,870 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 82.0 mm × 88.4 mm | |
| Power output | 81 kW (110 PS) | |
| Torque | 240 Nm @ 1,750 rpm | |
| Fuel system | Common-rail direct injection (Siemens) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 17.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable geometry turbo (VGT) | |
| Timing system | Belt‑driven camshafts | |
| Oil type | ACEA B3/B4 (e.g., SAE 5W‑40) | |
| Dry weight | Not specified in available OEM docs |
The VGT turbo provides strong, lag-free torque from low RPMs, ideal for urban van duties. The common-rail system demands ultra-low-sulfur diesel (ULSD) to prevent injector clogging and high-pressure pump wear. The dual-mass flywheel is prone to wear under heavy load; listen for drivetrain shudder or clunking. Timing belt replacement is critical at 120,000 km or 5 years to prevent interference engine damage. The DOHC design allows for higher performance but adds complexity to valve adjustments.
Oil Specs: Requires ACEA B3/B4 specification oil (Renault Technical Manual RTM-841). A 5W-40 semi-synthetic is commonly recommended for its balance of cold-start protection and high-temperature stability.
Emissions: Euro 3 certification applies to all 2001–2006 production models (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across all applications (Renault Group PT‑2003).
Renault Technical Information System: Manual RTM-841
Renault EPC (Electronic Parts Catalogue) Ref. 841725
Renault Service Note MEC‑089
VCA Type Approval Database (VCA/EMS/6789)
The Renault 841 725 was used across Renault's Trafic platform with longitudinal mounting. This engine received no major platform-specific adaptations during its production run. All applications are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the cylinder block, typically near the gearbox flange or on the front timing cover (Renault RTM-841). The code "841 725" is clearly marked. Visually, it can be identified by its common-rail fuel injectors and the variable geometry turbocharger. Differentiate from the earlier 829 700 by the presence of the DOHC cylinder head and common-rail system, as opposed to the SOHC and VP44 pump. Service parts for the 841 725 are specific and not interchangeable with the 829 700.
The 841 725's primary reliability risk is dual-mass flywheel failure, with elevated incidence in vehicles subjected to heavy loads or frequent stop-start cycles. Renault internal service data indicates this is the most common drivetrain-related repair, while its failure can make the vehicle unpleasant or unsafe to drive. Adherence to the maintenance schedule and avoiding harsh driving make timely inspection critical.
Analysis derived from Renault technical bulletins (2001-2006) and UK DVSA failure statistics (2007-2017). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT 841-725.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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