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 .
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 | Refer to vehicle handbook / manufacturer specification | |
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.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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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.
Aftermarket ECU tuning is common on the K9K612 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
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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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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