The Renault 841 726 is a 1,461 cc, inline‑four turbo‑diesel engine produced between 2006 and 2010. It features a common rail direct injection system, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form, it delivered 66 kW (90 PS) and 200 Nm of torque, designed for efficient urban performance in Renault's supermini and compact segments.
Fitted to models such as the Clio III and Modus, the 841 726 engine was engineered for responsive low‑end torque and fuel economy. Emissions compliance was achieved through a diesel particulate filter (DPF) and exhaust gas recirculation (EGR), allowing it to meet Euro 4 standards across its production run.
One documented reliability concern is premature failure of the EGR cooler, which can lead to coolant contamination and overheating. This issue, referenced in Renault Technical Note CLI‑06‑02, is often linked to carbon buildup restricting coolant flow. The cooler design was revised in later service campaigns to improve durability.
Production years 2006–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/6789).
The Renault 841 726 is a 1,461 cc inline‑four turbo‑diesel engineered for supermini and compact models (2006-2010). It combines common‑rail direct injection with a variable‑geometry turbocharger to deliver strong low‑end torque and efficient urban performance. Designed to meet Euro 4 standards, it balances everyday drivability with fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,461 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 76.0 mm × 80.5 mm | |
| Power output | 66 kW (90 PS) | |
| Torque | 200 Nm @ 1,750 rpm | |
| Fuel system | Delphi common‑rail (up to 1,600 bar) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 16.8:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable‑geometry turbo (Honeywell) | |
| Timing system | Belt‑driven | |
| Oil type | Renault RN0700 (SAE 5W‑40) | |
| Dry weight | 128 kg |
The VGT turbo provides strong low-RPM torque ideal for city driving but requires strict adherence to 15,000 km oil and filter changes using Renault RN0700 (5W-40) to protect the turbo and fuel system. The Delphi common-rail system demands ultra-low-sulfur diesel (EN 590) to prevent injector and high-pressure pump failure. The timing belt must be replaced every 100,000 km or 5 years to prevent catastrophic engine damage, as this is an interference design. EGR valve and cooler cleaning is recommended every 60,000 km to maintain performance and prevent coolant contamination as per Renault Technical Note CLI-06-02.
Oil Specs: Requires Renault RN0700 (5W-40) specification (Renault Technical Manual 841 726).
Emissions: Euro 4 certification applies to all 2006–2010 models (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under ECE R85 standards. Output is consistent across model range (Renault Group PT-2008).
Renault Technical Information System: Manual 841 726, Note CLI-06-02
VCA Type Approval Database (VCA/EMS/6789)
UNECE Regulation No. 85 (Engine Power Measurement)
The Renault 841 726 was used across Renault's Clio III and Modus platforms with transverse mounting. This engine received platform-specific adaptations-minor ECU mapping differences for estate variants-and no significant facelift revisions occurred during its production, ensuring broad parts interchangeability. 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 (Renault Technical Manual 841 726). The 8th digit of the VIN is 'D' for vehicles equipped with the 841 726 engine. Visually, it can be identified by its black plastic rocker cover with "dCi 90" embossed on it and the Delphi ECU mounted on the left side of the engine bay. Critical differentiation from the 841 724 (86 PS): The 841 726 has a different ECU calibration and a revised EGR cooler. Service parts are generally compatible across all 841 726 applications, but ECU software versions may vary by model year.
The 841 726's primary reliability risk is EGR cooler failure, with elevated incidence in vehicles subjected to frequent short trips. Renault internal service data indicates a significant number of coolers required replacement before 120,000 km, while owner reports frequently cite DPF regeneration issues as a secondary concern. Short-trip driving and extended oil change intervals make adherence to the RN0700 specification and 15,000 km service intervals critical.
Analysis derived from Renault technical bulletins (2006-2010) and UK DVSA failure statistics (2012-2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT 841-726.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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