The Renault 843 724 is a 1,461 cc, inline‑three turbo‑diesel engine produced between 2006 and 2011. It features an aluminium block and head, double overhead camshafts (DOHC), and a variable geometry turbocharger (VGT). This compact engine, part of the K9K family, was designed for efficiency in superminis and city cars, delivering outputs around 66–88 kW (90–120 PS) and 200–240 Nm of torque.
Fitted primarily to the Renault Clio III (B) and Twingo II (C06), including variants like the 1.5 dCi 85 and 1.5 dCi 105, the 843 724 prioritised low fuel consumption and urban agility. Emissions compliance for its production period was achieved through a diesel particulate filter (DPF) and exhaust gas recirculation (EGR), meeting Euro 4 standards as verified by VCA type approvals.
A documented concern involves premature failure of the EGR valve and cooler due to carbon buildup, often leading to reduced performance and increased emissions. Renault Service Bulletin 8437B addresses this, noting that restricted EGR flow is a primary cause of DPF regeneration faults. The issue was mitigated in later K9K engines through revised valve designs and updated ECU mapping for more frequent valve cleaning cycles.
Production years 2006–2011 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/6789).
The Renault 843 724 is a 1,461 cc inline‑three turbo‑diesel engineered for superminis and city cars (2006-2011). It combines common-rail direct injection with a variable-geometry turbocharger to deliver responsive low-end torque and exceptional fuel economy. Designed to meet Euro 4 standards, it balances compact dimensions with everyday drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,461 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑3, DOHC, 12‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 76.0 mm × 80.5 mm | |
| Power output | 66–88 kW (90–120 PS) | |
| Torque | 200–240 Nm @ 1,750–2,500 rpm | |
| Fuel system | Denso HP3 common-rail injection (up to 1,600 bar) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 16.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable-geometry turbo (Honeywell or Mitsubishi) | |
| Timing system | Belt‑driven | |
| Oil type | ACEA B4 / RN0700 (e.g., SAE 5W‑40) | |
| Dry weight | 115 kg |
The VGT turbo provides strong low-RPM response ideal for city driving but requires strict adherence to 20,000 km oil and filter changes to protect the turbo and injection system. ACEA B4 specification oil is mandatory. Fuel quality is critical; contaminated diesel accelerates EGR and DPF clogging. The timing belt must be replaced at 120,000 km to prevent interference engine damage. EGR valves require periodic cleaning per Renault SIB 8437B to maintain emissions compliance and prevent DPF faults.
Oil Specs: Requires ACEA B4 specification (Renault Technical Manual 8437B). Compatible with RN0700 standards.
Emissions: Euro 4 certification applies to all 2006–2011 production (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under SAE J1349 standards. Output varies by model application and ECU mapping (Renault PT-2008).
Renault Technical Information System: Manual 8437B, SIB 8437B
VCA Type Approval Database (VCA/EMS/6789)
ACEA European Oil Sequences: ACEA B4-04
The Renault 843 724 was used across Renault's B/C06 platforms with transverse mounting. This engine received platform-specific adaptations-different ECU mappings and ancillary layouts for the Clio versus the Twingo-creating minor service part variations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the alternator (Renault TIS 8437B). The 8th digit of the VIN typically indicates engine displacement and fuel type ('D' for 1.5 dCi). Visually, the engine is identified by its compact three-cylinder layout and the Denso HP3 common-rail pump mounted on the rear. Critical differentiation from the larger 1.9 dCi: The 843 724 is a 3-cylinder unit, while the 1.9 dCi is a 4-cylinder. Service parts, especially for the fuel and exhaust systems, are not interchangeable between these engine families.
The 843 724's primary reliability risk is EGR valve and cooler clogging, with elevated incidence in short-trip urban driving. Renault internal service data from 2009 noted a high frequency of EGR-related warranty claims before 80,000 km, while UK DVSA data shows a correlation between neglected EGR maintenance and DPF-related MOT failures. Short journeys and low-quality fuel make adherence to OEM cleaning schedules critical.
Analysis derived from Renault technical bulletins (2006-2011) and UK DVSA failure statistics (2012-2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT 843-724.
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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