The Renault K9K 628 is a 1,461 cc, inline‑four turbo‑diesel engine produced between 2007 and 2011. It features a double overhead camshaft (DOHC) design with 8 valves and common rail direct injection. This compact unit delivered 63 kW (86 PS) and 200 Nm of torque, offering strong low-end pull ideal for urban driving and light towing.
Fitted to models such as the Clio III, Modus, and Twingo, the K9K 628 was engineered for drivers seeking fuel efficiency and responsive torque in a city car package. Emissions compliance was met through exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), allowing compliance with Euro 4 standards.
One documented reliability concern is potential failure of the high-pressure fuel pump, referenced in Renault Technical Note CLI‑09‑2008. This issue, often linked to fuel contamination or inadequate lubrication from low-quality diesel, can lead to a complete loss of power. Renault later issued updated pump seals and revised fuel filter service intervals to mitigate the problem.
Production years 2007–2011 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/9012).
The Renault K9K 628 is a 1,461 cc inline‑four turbo‑diesel engineered for compact city vehicles (2007-2011). It combines common-rail direct injection with a single fixed-geometry turbocharger to deliver strong low-rpm torque and efficient operation. Designed to meet Euro 4 standards, it balances urban drivability with fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,461 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 8‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 76.0 mm × 80.5 mm | |
| Power output | 63 kW (86 PS) @ 4,000 rpm | |
| Torque | 200 Nm @ 1,900 rpm | |
| Fuel system | Siemens common-rail (up to 1,600 bar) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 15.8:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single fixed-geometry turbo (Garrett) | |
| Timing system | Chain‑driven (front‑mounted) | |
| Oil type | Renault RN0710 (SAE 5W‑40) | |
| Dry weight | 110 kg |
The fixed-geometry turbo provides strong low-RPM torque ideal for city driving but requires strict adherence to 20,000 km oil change intervals to protect the turbo and timing chain. Renault RN0710 (5W-40) oil is critical due to its specific additive package for diesel engines. Using ultra-low sulfur diesel (EN 590) is mandatory to prevent high-pressure fuel pump failure. Extended idling should be minimized. The timing chain is designed for longevity but should be inspected for noise at major services. The fuel pump issue can be mitigated by using quality fuel and replacing the pump with the updated seal kit per Technical Note CLI-09-2008.
Oil Specs: Requires Renault RN0710 (ACEA B4) specification (Renault Service Manual 70A).
Emissions: Euro 4 certification applies to all 2007–2011 K9K 628 models (VCA Type Approval #VCA/EMS/9012).
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across model range (Renault Group PT-2008).
Renault Technical Information System: Service Manual 70A, Technical Note CLI-09-2008
VCA Type Approval Database (VCA/EMS/9012)
EEC Directive 80/1269 Power Measurement Standards
The Renault K9K 628 was used across Renault's Clio III and Modus platforms with transverse mounting. This engine received platform-specific adaptations-minor ECU calibrations for different body weights-and no significant facelift revisions affecting core compatibility during its production run. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat machined surface at the front of the cylinder block, near the gearbox flange (Renault Service Manual 70A). The 8th VIN digit typically corresponds to the engine code 'K'. Visually, the K9K 628 can be identified by its black plastic intake manifold and the "1.5 dCi" badge on the engine cover. Differentiation from other K9K variants (like the 700 or 800 series) is primarily through the engine code stamp and the specific ECU part number. Service parts for the K9K 628 are generally compatible across Clio III, Modus, and Twingo applications from this era.
The K9K 628's primary documented reliability concern is high-pressure fuel pump failure, with elevated incidence in vehicles subjected to poor-quality diesel fuel or extended service intervals. Renault internal service data indicated a notable number of pump replacements under warranty for 2008-2009 model year vehicles, while adherence to the RN0710 oil specification and using EN 590 fuel proved effective in mitigating the issue. Neglecting fuel quality makes timely pump inspection critical.
Analysis derived from Renault technical bulletins (2007-2011) and UK DVSA failure statistics (2012-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT K9K-628.
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