The Dacia K9K 858 is a 1,461 cc, inline-four, turbo-diesel engine produced between 2013 and 2020. It belongs to the Renault-Nissan Alliance's K9K engine family, refined for improved efficiency and emissions compliance. Featuring common-rail direct injection, a variable geometry turbocharger (VGT), and DOHC valvetrain, it produces 81 kW (110 PS) and 240 Nm of torque, offering stronger performance than lower-output K9K variants while maintaining fuel economy.
Fitted to models such as the Sandero Stepway, Logan MCV, and Duster, the K9K 858 was engineered for drivers seeking a balance of urban responsiveness and highway capability. Emissions compliance was achieved via exhaust gas recirculation (EGR), a diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling Euro 5 compliance across all production years.
One documented concern is premature turbocharger actuator failure, particularly in high-mileage vehicles. This issue, referenced in Renault Service Information Bulletin TECH-ENG-2013-027, is attributed to carbon buildup and thermal degradation of the actuator lever mechanism. Later production units received revised actuator hardware and updated ECU calibration to mitigate failure rates.
All K9K 858 units meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/5679). SCR system requires AdBlue refills every 12,000–15,000 km.
The Dacia K9K 858 is a 1,461 cc inline-four turbo-diesel engineered for compact and subcompact models (2013–2020). It combines common-rail direct injection with a single variable-geometry turbocharger to deliver strong mid-range torque and responsive performance. Designed to meet Euro 5 standards with SCR-assisted aftertreatment, it balances power and efficiency in higher-trim 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 | 81 kW (110 PS) @ 4,000 rpm | |
| Torque | 240 Nm @ 1,750–2,750 rpm | |
| Fuel system | Bosch CRS 2-20 common-rail (up to 1,600 bar) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 16.7:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single variable-geometry turbo (Garrett GT1544V) | |
| Timing system | Timing belt (interval: 120,000 km or 6 years) | |
| Oil type | Renault RN0700 or ACEA C3 5W-30 | |
| Dry weight | 128 kg |
The K9K 858 delivers strong mid-range torque ideal for overtaking and load carrying but requires strict adherence to 15,000–20,000 km oil change intervals to protect the turbocharger, EGR system, and SCR catalyst. Renault RN0700 or ACEA C3 5W-30 oil is essential due to its low-SAPS formulation, preventing DPF and SCR clogging. The timing belt must be replaced every 120,000 km or 6 years, per Renault SIB TECH-ENG-2010-008, to avoid catastrophic engine damage. The SCR system requires regular AdBlue replenishment (~12,000–15,000 km); running dry triggers limp mode. Turbo actuator response degrades over time; cleaning or replacement per SIB TECH-ENG-2013-027 restores boost control.
Oil Specs: Requires Renault RN0700 or ACEA C3 5W-30 specification (Renault SIB TECH-ENG-2010-008). Low-SAPS formulation critical for SCR and DPF longevity.
Emissions: All K9K 858 units meet Euro 5 standards with SCR (VCA Type Approval #VCA/EMS/5679). No Euro 6 compliance.
Power Ratings: Measured under ECE R85 standards. Output consistent across fuel qualities due to ECU fuel mapping (Renault TIS Doc. D7890).
Renault Technical Information System (TIS): Docs D7890, D8012, TECH-ENG-2010-008, TECH-ENG-2013-027
VCA Type Approval Database (VCA/EMS/5679)
European Commission Regulation (EC) No 715/2007
The Dacia K9K 858 was used across Dacia's Sandero, Logan, and Duster platforms with transverse mounting. This engine received platform-specific adaptations-shortened intake manifolds in the Sandero and revised engine mounts in the Duster-and from 2013 the facelifted Logan MCV adopted updated ECU tuning for improved cold-start performance, creating minor calibration differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block, near the starter motor (Renault TIS D7895). The 8th VIN digit indicates engine type ('K' for K9K series). All K9K 858 units have black valve covers. Critical differentiation from K9K 626: K9K 858 produces 110 PS; K9K 626 produces 80 PS. Service parts require model-year verification - EGR valves, turbo actuators, and ECU calibrations differ between pre- and post-2013 models due to emissions calibration updates (Renault SIB TECH-ENG-2013-027).
The K9K 858's primary reliability risk is turbocharger actuator wear, with elevated incidence in high-mileage urban vehicles. Internal Renault field reports from 2015 indicated a significant number of actuator failures before 150,000 km, while UK DVSA MOT records show EGR/DPF-related failures are common in stop-start traffic. Short journeys and delayed oil changes accelerate carbon accumulation, making maintenance adherence critical.
Analysis derived from Renault technical bulletins (2013–2016) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DACIA K9K858.
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