The Renault K9K 722 is a 1,461 cc, inline‑four turbo‑diesel engine produced between 2007 and 2018. It features a robust cast‑iron block, double overhead camshafts (DOHC), and a fixed‑geometry turbocharger, delivering outputs between 66 kW (90 PS) and 81 kW (110 PS) with peak torque of 200–240 Nm. Its simple, durable architecture prioritizes cost‑effective ownership and strong low‑end pull for city driving.
Fitted extensively to the Clio III, Mégane III, and Kangoo, th…
Production years 2007–2010 meet Euro 4 standards; 2011–2018 models typically meet Euro 5 compliance depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Renault K9K 722 is a 1,461 cc inline‑four turbo‑diesel engineered for supermini and compact MPV applications (2007-2018). It combines a fixed‑geometry turbocharger with DOHC valvetrain to deliver responsive low‑end torque and frugal fuel consumption. Designed to meet Euro 4 and Euro 5 standards, it prioritizes reliability and cost‑effective ownership.
| 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 | 66–81 kW (90–110 PS) | |
Torque | 200–240 Nm @ 1,750 rpm | |
Fuel system | Siemens SID804 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (pre‑2011); Euro 5 (2011 onwards) | |
Compression ratio | 16.3:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single fixed‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0710 (SAE 5W‑40) | |
Dry weight | 117 kg |
The Renault K9K 722 was used across Renault's B/C platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Kangoo and specific ECU mapping for the Clio-and from 2011 received DPF hardware for Euro 5 compliance, creating minor service part differences. All adaptations are documented in OEM technical bulletins.
The K9K 722's primary reliability risk is dual-mass flywheel (DMF) failure on higher-output variants, with elevated incidence in stop-start urban use. Renault internal data indicated a notable failure rate before 150,000 km for early builds, while UK DVSA records show EGR system faults as a common MOT failure point. High torque and frequent gear changes increase DMF stress, making inspection and using the latest OEM part critical.
Analysis derived from Renault technical bulletins (2010-2016) 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 722 is generally robust with simple mechanics, but early high-power variants (110 PS) are known for dual-mass flywheel failures. Later models and the 90 PS version are more dependable. Regular oil changes and using the correct RN0710 oil are crucial for longevity, especially for the turbo and timing chain.
The most frequent issues are dual-mass flywheel failure (causing vibration), EGR valve/carbon buildup (causing running issues), turbo actuator faults (causing loss of power), and leaking injector seals/return lines. These are well-documented in Renault service information.
The K9K 722 was widely used in the Renault Clio III (2007-2012), Mégane III (2008-2015), and Kangoo (2007-2018) as the dCi 90 and dCi 110. It was also used by Nissan in the Micra K13 (2010-2016) as the dCi 90 engine.
Yes, the K9K 722 responds well to ECU remapping. A Stage 1 remap can safely increase power to around 130-140 PS and torque to 280-300 Nm. The standard internals are strong, but upgrading the clutch (especially if the DMF hasn't been replaced) is highly recommended to handle the extra torque.
Excellent for its era. In a Clio III dCi 90, expect real-world figures of ~4.5 L/100km (63 mpg UK) on a run and ~5.5 L/100km (51 mpg UK) in the city. The 110 PS variant is slightly thirstier but still returns a combined 50-55 mpg UK in careful driving.
Yes. The K9K 722 is an interference engine. If the timing chain were to fail or jump, the pistons would collide with the open valves, causing catastrophic engine damage. Fortunately, the chain is very durable with proper maintenance.
Renault mandates oil meeting the RN0710 specification, typically a 5W-40 synthetic. Using the correct oil is vital for protecting the turbo, DPF (if fitted), and ensuring the timing chain lasts. Change intervals should not exceed 20,000 km or 1 year.
Comprehensive technical documentation and regulatory references
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RENAULT Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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
UK compliance and certification requirements for imported and modified vehicles.
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