The Renault K9K 846 is a 1,461 cc, inline‑three turbo‑diesel engine produced between 2015 and 2020. It features a cast‑iron block, aluminium head, common rail direct injection, and a variable‑geometry turbocharger (VGT). In standard form, it delivers 66 kW (90 PS) and 220 Nm of torque, maintaining the efficiency focus while meeting stricter Euro 6 emissions.
Fitted primarily to the Clio IV facelift, Captur I facelift, and Kadjar, the K9K 846 was engineered for global mar…
All production years meet Euro 6 standards (Euro 6b/c depending on model year) (VCA UK Type Approval #VCA/EMS/7890).
The Renault K9K 846 is a 1,461 cc inline‑three turbo‑diesel engineered for B/C-segment platforms (2015-2020). It combines common‑rail direct injection with a variable‑geometry turbocharger to deliver responsive low‑end torque and improved emissions performance. Designed to meet Euro 6 standards, it incorporates AdBlue injection for NOx reduction.
| 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 | 220 Nm @ 1,750 rpm | |
Fuel system | Bosch CP1 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 6 (Euro 6b/c) | |
Compression ratio | 16.3:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Variable‑geometry turbo (Honeywell) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0720 (SAE 0W‑30) | |
Dry weight | 115 kg |
The Renault K9K 846 was used across Renault's B/C-segment platforms with transverse mounting. This engine received platform-specific adaptations-revised exhaust routing for the Kadjar and updated engine mounts for the Clio IV facelift-and featured a standardized AdBlue tank and injector assembly across all applications. All adaptations are documented in OEM technical bulletins.
The K9K 846's primary reliability risk remains EGR system failure, with elevated incidence in vehicles subjected to frequent short urban journeys. Renault internal service data indicates a persistent frequency of EGR-related repairs, while UK DVSA MOT statistics show EGR and SCR/AdBlue system faults as common causes of emissions test failure. Short-trip driving accelerates carbon buildup and prevents proper SCR system operation, making preventative cleaning and AdBlue system maintenance critical.
Analysis derived from Renault technical bulletins (2015-2020) and UK DVSA failure statistics (2020-2023). 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 846 is mechanically robust, with its timing chain designed for longevity. Its main vulnerabilities are the EGR system and the AdBlue/SCR system, both prone to issues with urban driving or neglect. With proactive EGR/AdBlue maintenance and strict oil changes using RN0720 spec oil, it can be a dependable engine.
The most frequent issues are EGR valve/cooler failure, AdBlue system faults (injector crystallization, sensor failure), and VGT actuator faults. Glow plug/module problems and oil leaks from the rocker cover are also common. These are well-documented in Renault service bulletins like 16D009.
The K9K 846 (90 PS dCi) was primarily used in the Renault Clio IV facelift (2016–2020), Captur I facelift (2017–2020), and Kadjar (2015–2020). It was also fitted to the Nissan Qashqai II (2015–2020) as part of the Renault-Nissan alliance.
Yes, the K9K 846 responds well to ECU remapping. Stage 1 tunes can safely increase power to around 110-115 PS and torque to 250-260 Nm. The variable-geometry turbo and standard internals are generally robust enough for this level of increase without hardware modifications, though AdBlue system function should be monitored post-tune.
Excellent. In a Clio IV dCi 90, expect combined figures of ~4.0 L/100km (71 mpg UK). Real-world economy is typically 55-65 mpg UK, depending on driving style. Its VGT turbo enhances low-speed efficiency, making it ideal for city driving, while the AdBlue system helps maintain efficiency under stricter emissions rules.
Yes. The K9K 846 is an interference engine. If the timing chain were to fail (though rare), the pistons would collide with the open valves, causing catastrophic internal engine damage. The chain is very durable with proper maintenance.
Renault mandates the use of RN0720 specification oil, typically a 0W-30 synthetic. This low-SAPS oil is vital for protecting the VGT, maintaining chain lubrication, and ensuring the DPF and SCR systems function correctly without becoming clogged or contaminated.
Comprehensive technical documentation and regulatory references
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