The Renault 843 723 is a 1,461 cc, inline‑three turbo‑diesel engine produced between 2006 and 2010. It features a common rail direct injection system, a variable geometry turbocharger (VGT), and a dual overhead camshaft (DOHC) with 12 valves. This compact engine, often designated as the K9K, was designed for efficiency and responsive low‑end torque in supermini and city car applications.
Fitted to models such as the Clio III, Modus, and Twingo III, the 843 723 engine was engineered for urban agility and fuel economy. Emissions compliance for its production period was primarily achieved through exhaust gas recirculation (EGR) and an oxidation catalyst, meeting Euro 4 standards.
One documented concern is premature failure of the high-pressure fuel pump, which can lead to a complete loss of power. This issue, referenced in Renault Service Information Bulletin 8437A, is often linked to fuel contamination or extended service intervals. Later production runs saw revised pump internals to improve durability.
Production years 2006–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/8437).
The Renault 843 723 is a 1,461 cc inline‑three turbo‑diesel engineered for supermini and city cars (2006-2010). It combines common rail direct injection with a variable geometry turbocharger to deliver responsive low‑rpm torque and exceptional fuel efficiency. Designed to meet Euro 4 standards, it prioritizes urban drivability and low running costs.
| 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 | 55–66 kW (75–90 PS) | |
| Torque | 190–200 Nm @ 1,750 rpm | |
| Fuel system | Common rail (Bosch CP1 or CP3) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 16.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Garrett) | |
| Timing system | Belt‑driven | |
| Oil type | Renault RN0700 or RN0710 (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 timing belt replacement intervals to prevent catastrophic failure. Renault RN0700/RN0710 oil is critical for fuel pump and turbo longevity. Fuel quality is paramount; contaminated or low-grade diesel is a primary cause of high-pressure pump failure per Renault SIB 8437A. Extended idling should be avoided to reduce soot buildup in the EGR system. Pre-emptive replacement of the fuel pump at high mileage is recommended for preventative maintenance.
Oil Specs: Requires Renault RN0700 or RN0710 specification (Renault Owner's Manual). ACEA B4 is the underlying standard.
Emissions: Euro 4 certification applies to all 2006–2010 models (VCA Type Approval #VCA/EMS/8437).
Power Ratings: Measured under SAE J1349 standards. Output varies by application and ECU mapping (Renault TIS Doc. K9K-03).
Renault Technical Information System (TIS): Docs K9K-01, K9K-02, K9K-03
Renault Service Information Bulletin (SIB) 8437A
VCA Type Approval Database (VCA/EMS/8437)
The Renault 843 723 was used across Renault's Clio III/Modus platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Twingo III-creating minor interchange considerations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the cylinder block, near the gearbox flange (Renault TIS K9K-01). The 8th digit of the VIN typically indicates engine displacement ('5' for 1.5L dCi). Visually, the engine is identifiable by its black plastic rocker cover with 'dCi' branding and the Bosch EDC16C34 ECU mounted on the bulkhead. Critical differentiation from later K9K variants: The 843 723 uses a cable-operated throttle body, while post-2010 engines switched to electronic throttle control (drive-by-wire). Service parts, particularly for the fuel system, are specific to the 843 723 build and not always compatible with later K9K engines.
The 843 723's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel or with extended service intervals. Renault internal service data indicates this is a frequent cause for roadside recovery, while owner reports consistently cite sudden power loss. Fuel quality and preventative maintenance make pump replacement critical.
Analysis derived from Renault technical bulletins (2006-2010) and aggregated European owner workshop data (2010-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT 843-723.
Comprehensive technical documentation and regulatory references
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RENAULT Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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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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GOV.UK: Vehicle Approval
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