The Dacia K9K 612 is a 1,461 cc, inline — four turbo — diesel engine produced between 2008 and 2017. It forms part of the Renault — Nissan common — rail diesel family, delivering 55 kW (75 PS) with 195 Nm of torque. Featuring a variable geometry turbocharger (VGT), DOHC layout, and Bosch CRDi fuel system, it was engineered for low running costs and urban drivability.
Fitted to models such as the Dacia Sandero, Logan, and Duster, the K9K 612 was designed for budget — conscious drive…
Production years 2008–2009 meet Euro 4 standards; 2010–2017 models comply with Euro 5 depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Dacia K9K 612 is a 1,461 cc inline-four turbo-diesel engineered for compact and subcompact models (2008–2017). It combines common-rail direct injection with a variable geometry turbocharger to deliver responsive low-end torque and strong fuel economy. Designed to meet Euro 4 and Euro 5 standards, it balances affordability with durability in high-mileage applications.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,461 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 76.0 mm × 80.5 mm | |
Power output | 55 kW (75 PS) @ 4,000 rpm | |
Torque | 195 Nm @ 1,750 rpm | |
Fuel system | Bosch CRDi common-rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (pre-2010); Euro 5 (2010–2017) | |
Compression ratio | 16.7:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (IHI RHF3) | |
Timing system | Toothed belt (interval: 120,000 km or 6 years) | |
Oil type | Renault RN0700 or RN0710 (5W-30 or 5W-40) | |
Dry weight | 118 kg |
The Dacia K9K 612 was used across Dacia's Sandero, Logan, and Duster platforms with transverse mounting and shared with Renault and Nissan under alliance agreements. This engine received platform-specific adaptations-shorter intake tracts in the Sandero and revised cooling in the Duster-and from 2014 the facelifted Logan II adopted revised EGR calibration, creating interchange limits. Partnerships allowed Renault's Clio III and Nissan Micra K13 to use identical powertrains. All adaptations are documented in OEM technical bulletins.
The K9K 612's primary reliability risk is timing belt failure on neglected units, with elevated incidence in high-mileage or delayed-maintenance vehicles. Internal Renault quality reports from 2013 indicated a notable share of pre-2014 engines requiring belt replacement before 120,000 km due to tensioner wear, while UK DVSA records show timing-related failures contributing to MOT failures in diesel models. Extended service intervals and poor coolant maintenance increase risk, making adherence to 6-year replacement critical regardless of mileage.
Analysis derived from Renault technical bulletins (2010–2016) and UK DVSA failure statistics (2014–2022). 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 612 is generally robust when maintained properly. Early models (2008–2013) had timing belt concerns if intervals were exceeded. Post-2014 revisions improved tensioner durability. Regular servicing, timely belt changes, and using correct oil (5W-30/40 RN0700) are essential for long-term reliability.
The main issues are timing belt/tensioner failure, turbo actuator sticking, EGR and intake carbon buildup, and oil leaks from gaskets. These are documented in Renault service bulletins. Preventative maintenance significantly reduces failure rates.
The K9K 612 was used in the first-generation Sandero (2008–2012), Logan (2008–2012), and first-generation Duster (2010–2017). It was also shared with Renault Clio III and Nissan Micra K13. Euro 4 applied pre-2010; Euro 5 for later models.
Limited tuning potential exists. ECU remaps can achieve +10–15 kW safely, but gains are modest due to small turbo and EGR constraints. Supporting mods like intercooler upgrade are rare. Most owners prioritize reliability over performance.
Excellent for its class. In a Dacia Sandero, expect ~4.2 L/100km (city) and ~3.5 L/100km (highway), or about 67 mpg UK combined. Real-world mixed driving typically yields 60–70 mpg (UK), making it highly economical.
Yes. The K9K 612 is an interference engine. If the timing belt fails, pistons contact open valves, causing severe internal damage. Immediate belt replacement at 120,000 km or 6 years is critical, even if mileage is low.
Renault specifies 5W-30 or 5W-40 oil meeting RN0700 or RN0710 standards. Use high-quality synthetic diesel-rated oil and change every 15,000 km or annually. Proper oil prevents turbo, injector, and timing system wear.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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