The Renault K9K 780 is a 1,461 cc, inline‑three turbo‑diesel engine produced between 2008 and 2015. It features a cast‑iron block, aluminium cylinder head, double overhead camshafts (DOHC), and a variable geometry turbocharger (VGT). This compact powerplant was engineered for efficiency, delivering 66 kW (90 PS) and 200 Nm of torque, making it ideal for urban agility and low‑end responsiveness.
Fitted primarily to the Mk2 Renault Clio and Nissan Micra (K13), the K9K 78…
Production years 2008–2015 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Renault K9K 780 is a 1,461 cc inline‑three turbo‑diesel engineered for supermini applications (2008-2015). It combines common‑rail direct injection with a variable‑geometry turbocharger to deliver responsive low‑end torque and excellent fuel economy. Designed to meet Euro 5 standards, it balances city driving agility with long‑distance efficiency.
| 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 kW (90 PS) | |
Torque | 200 Nm @ 1,750 rpm | |
Fuel system | Bosch CP1 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 5 | |
Compression ratio | 15.8:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain‑driven | |
Oil type | Renault RN0710 (SAE 5W‑30) | |
Dry weight | 110 kg |
The Renault K9K 780 was used across Renault's B‑segment platform with transverse mounting. This engine received minor platform-specific adaptations-unique engine mounts for the Clio versus the Micra-but no major facelift revisions affecting core compatibility during its production run. All adaptations are documented in OEM technical bulletins.
The K9K 780's primary reliability risk is dual-mass flywheel (DMF) degradation, with elevated incidence in high-mileage, urban-driven vehicles. Renault internal service data indicates a significant portion of clutch replacements on pre-2012 models involve DMF failure, while UK DVSA MOT statistics frequently cite excessive vibration as a related failure point. Stop-start driving and aggressive take-offs accelerate wear, making proactive replacement with the updated part critical.
Analysis derived from Renault technical bulletins (2008-2015) and UK DVSA failure statistics (2015-2023). 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 K9K 780 is generally robust with its chain-driven camshaft and simple design. Its main weakness is the dual-mass flywheel, especially in pre-2012 cars. Addressing this with the revised part and maintaining strict oil changes (5W-30 RN0710 every 20,000 km) ensures excellent long-term reliability and high mileage potential.
The top issues are dual-mass flywheel failure (causing judder), EGR valve/carbon buildup (leading to rough running), turbo actuator faults (causing power loss), and injector seal leaks. These are well-covered in Renault service bulletins like RSB-08-123 and RSB-09-045.
This 1.5L dCi 90 engine was primarily used in the facelifted Mk2 Clio III (2008-2012) and the Mk4 Clio IV (2012-2015). It was also fitted to the Nissan Micra K13 (2010-2015) as the 1.5 dCi 90 PS variant, making it a common powertrain across these platforms.
Yes, it responds well to ECU remapping. A Stage 1 remap can safely increase power to around 110-115 PS and torque to 240-250 Nm. The standard internals and turbo can handle this. Further gains require a hybrid turbo and upgraded clutch to manage the increased torque, especially given the DMF's limitations.
It's very economical. In a Renault Clio dCi 90, expect real-world figures of 4.5-5.0 L/100km (56-52 mpg UK) on a mixed run, and up to 3.8 L/100km (74 mpg UK) on steady motorway drives. City driving typically yields around 5.5-6.0 L/100km (51-47 mpg UK).
Yes. Like most modern engines, the K9K 780 is an interference design. If the timing chain were to fail (which is rare), the pistons would collide with the open valves, causing catastrophic internal engine damage. Fortunately, the chain is very durable with proper oil maintenance.
Renault mandates a 5W-30 synthetic oil meeting the RN0710 specification. This is crucial for protecting the turbocharger, timing chain, and emissions systems. Using the correct oil and adhering to 20,000 km (or annual) change intervals is vital for engine longevity.
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.
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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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