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 e…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 843 723 is generally economical and robust for city driving, but its Achilles' heel is the high-pressure fuel pump. With strict adherence to using high-quality diesel and timely preventative maintenance, including potential pump replacement, it can be very reliable. Regular oil changes with the correct specification are also crucial.
The most frequent and critical issue is high-pressure fuel pump failure, leading to sudden power loss. Other common problems include EGR system clogging, timing belt wear, and turbo actuator failure. These are well-documented in Renault service information bulletins.
This 1.5 dCi engine was primarily used in the Clio III, Modus, and Twingo III from 2006 to 2010. It was also used in the European-market Nissan Micra K12. It was badged as the 1.5 dCi 75, 85, or 90, depending on the power output.
Yes, the 843 723 responds well to ECU remapping. Stage 1 tunes can safely increase power to around 105-115 PS and torque to 220+ Nm. The stock turbo and internals are quite capable. However, ensuring the fuel pump is in excellent condition is paramount before any tuning.
Exceptional for its size. In a Clio III or Modus, you can expect real-world figures of 4.5-5.5 L/100km (51-63 mpg UK) on a mixed cycle. Highway driving can see consumption drop to around 4.0 L/100km (71 mpg UK), making it one of the most economical diesels of its era.
Yes. The 843 723 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. This makes adhering to the timing belt replacement schedule absolutely critical.
Renault specifies RN0700 or RN0710 fully synthetic oil, typically in 5W-40 viscosity. This is essential for protecting the turbocharger, maintaining fuel system integrity, and ensuring proper lubrication. Using the correct specification is non-negotiable for engine health.
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
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
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