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…
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 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.
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.
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The 841 726 can be reliable with meticulous maintenance, particularly regarding oil changes and driving habits to promote DPF regeneration. Its main weakness is the EGR cooler, which is prone to failure on vehicles used for frequent short trips. Regular oil changes with RN0700 spec oil and timely replacement of the timing belt are crucial for longevity beyond 150,000 km.
The most frequent issues are EGR cooler failure, DPF regeneration problems, and turbo wastegate sticking. Glow plug relay failures are also common as the engine ages. These are well-documented in Renault service bulletins and require prompt attention to avoid further damage.
The 841 726 1.5 dCi 90 engine was primarily used in the Renault Clio III (2006-2010) and Modus (2006-2010). It was not used in other Renault models or licensed to other manufacturers during its production run.
Yes, the 841 726 responds well to ECU remapping. A Stage 1 remap can safely increase power to around 110-115 PS and torque to 240-250 Nm. The standard internals are robust, but supporting modifications like a larger intercooler are recommended for sustained high performance.
Excellent for its size. In a Clio III, expect real-world figures of around 5.0 L/100km in mixed driving, translating to approximately 56 mpg (UK). Highway cruising can yield figures closer to 4.2 L/100km (67 mpg UK) under optimal conditions.
Yes. The 841 726 is an interference engine. If the timing belt breaks or jumps, the pistons will collide with the open valves, causing severe and expensive engine damage. Strict adherence to the 100,000 km or 5-year replacement interval is non-negotiable.
Renault mandates the use of RN0700 specification oil, typically a 5W-40 synthetic. Using the correct oil is vital for protecting the turbocharger and DPF system. Oil and filter changes should be performed every 15,000 km or annually.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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