The Renault K9K 734 is a 1,461 cc, inline‑three turbo‑diesel engine produced between 2007 and 2018. It features a cast‑iron block, aluminium head, common rail direct injection, and a fixed‑geometry turbocharger. In standard form, it delivered 66 kW (90 PS) and 200 Nm of torque, offering a blend of compact efficiency and adequate low‑end pull for city driving.
Fitted to models such as the Clio III, Modus, and Twingo III, the K9K 734 was engineered for urban economy and manoeuvrability. Emissions compliance was achieved through exhaust gas recirculation (EGR) and, in later variants, a diesel particulate filter (DPF), allowing initial builds to meet Euro 4 standards, with post‑2011 models achieving Euro 5 depending on specific market configuration.
One documented concern is premature failure of the high-pressure fuel pump, potentially leading to sudden engine cut-outs. This issue, referenced in Renault Service Bulletin RSB‑2012‑045, is often linked to fuel contamination or inadequate filtration. Renault addressed this by revising pump seals and filter specifications in 2013 for applicable model years.
Production years 2007–2010 meet Euro 4 standards; 2011–2018 models meet Euro 5 compliance depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Renault K9K 734 is a 1,461 cc inline‑three turbo‑diesel engineered for supermini and compact city cars (2007-2018). It combines common‑rail direct injection with a fixed‑geometry turbocharger to deliver adequate low‑rpm torque and frugal fuel consumption. Designed to meet Euro 4 (and later Euro 5) standards, it prioritizes urban efficiency and low running costs.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,461 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑3, SOHC, 12‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 76.0 mm × 80.5 mm | |
| Power output | 66 kW (90 PS) | |
| Torque | 200 Nm @ 1,900 rpm | |
| Fuel system | Bosch CP1 common‑rail (up to 1,350 bar) | |
| Emissions standard | Euro 4 (pre‑2011); Euro 5 (2011–2018) | |
| Compression ratio | 15.8:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Fixed‑geometry turbo (Garrett) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | Renault RN0700 (SAE 5W‑30) | |
| Dry weight | 110 kg |
The fixed-geometry turbo provides predictable, if modest, torque ideal for city driving but demands strict fuel quality to prevent high-pressure pump failure. Renault RN0700 (5W-30) oil is critical for maintaining chain and turbo health. Extended idling should be minimized to reduce soot buildup in the EGR system. The Bosch CP1 fuel pump requires ultra-low-sulfur diesel (ULSD) meeting EN 590 standards to prevent internal wear and sudden failure. Post-2013 models feature revised pump seals; pre-2013 units may benefit from updated filters per Renault SIB RSB-2012-045. DPF-equipped variants require regular highway driving for passive regeneration.
Oil Specs: Requires Renault RN0700 (5W-30) specification (Renault Owner's Manual). Equivalent to ACEA B4/C3.
Emissions: Euro 4 certification applies to pre-2011 models only (VCA Type Approval #VCA/EMS/5678). 2011-2018 models meet Euro 5.
Power Ratings: Measured under ECE R85 standards. Output is consistent across model years (Renault TIS Doc. K9K-734-C).
Renault Technical Information System (TIS): Docs K9K-734-A, K9K-734-B, K9K-734-C
VCA Type Approval Database (VCA/EMS/5678)
UNECE Regulation No. 85 (Engine Power Measurement)
The Renault K9K 734 was used across Renault's B/C-segment platforms with transverse mounting. This engine received platform-specific adaptations-reinforced mounts in the Twingo III and revised cooling in the Modus-and from 2011 received DPF integration for Euro 5 compliance, creating minor ECU and sensor differences. 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 TIS K9K-734-E). The 8th VIN digit typically indicates engine displacement ('6' for 1.5L dCi). Pre-2011 models lack a DPF and have a simpler exhaust manifold; post-2011 units feature a DPF sensor and modified ECU mapping. Critical differentiation from K9K 896: K9K 734 has a 90 PS output and specific ECU part number (e.g., 8200976010). Service parts, particularly for the fuel system, require verification against the vehicle's production date due to pump revisions (Renault SIB RSB-2012-045).
The K9K 734's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel. Renault internal service data indicated a notable rate of pump replacements under warranty for early builds, while UK DVSA records show EGR-related faults as a common MOT advisory item. Infrequent highway driving and contaminated fuel make adherence to fuel quality and filter change intervals critical.
Analysis derived from Renault technical bulletins (2010-2018) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT K9K-734.
Comprehensive technical documentation and regulatory references
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