The Renault K9K 812 is a 1,461 cc, inline‑three turbo‑diesel engine produced between 2012 and 2021. It features a cast iron block, aluminium head, and a single overhead camshaft (SOHC) with 12 valves. Common — rail direct injection and a variable — geometry turbocharger (VGT) deliver outputs ranging from 66 kW (90 PS) to 81 kW (110 PS), providing enhanced low — rpm torque and efficiency compared to its fixed — geometry predecessor.
Fitted to models such as the Clio IV, Captur,…
Production years 2012–2014 meet Euro 5 standards; 2015–2021 models meet Euro 6 standards .
The Renault K9K 812 is a 1,461 cc inline‑three turbo‑diesel engineered for supermini and compact SUV platforms (2012-2021). It combines common‑rail direct injection with a variable‑geometry turbocharger to deliver a flatter, more responsive torque curve and improved fuel efficiency. Designed to meet Euro 5 and Euro 6 standards, it represents a significant emissions and drivability upgrade over prior K9K variants.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,461 cc | |
Fuel type | Diesel | |
Configuration | Inline‑3, SOHC, 12‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 76.0 mm × 80.5 mm | |
Power output | 66–81 kW (90–110 PS) | |
Torque | 220 Nm @ 1,750 rpm | |
Fuel system | Bosch CP1.2 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 5 (2012–2014); Euro 6 (2015–2021) | |
Compression ratio | 16.3:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Variable‑geometry turbo (Honeywell) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0700 or RN0710 (SAE 5W‑30) | |
Dry weight | 112 kg |
The Renault K9K 812 was used across Renault's B/C-segment platforms with transverse mounting. This engine received platform-specific adaptations-different exhaust manifolds for the Clio versus the Captur-and from 2015 the introduction of NOx adsorber catalysts for Euro 6 compliance, creating minor service part differences. 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 812 is generally more refined and efficient than its predecessor, but long-term reliability is heavily dependent on preventing DPF and EGR issues. Regular oil changes with the correct low-SAPS specification and avoiding constant short trips are paramount. Well-maintained examples can reliably exceed 150,000 km.
The most frequent issues are DPF regeneration failures (especially on Euro 6 models), EGR valve/cooler clogging, variable-geometry turbo actuator faults, and injector seal leaks. These are well-documented in Renault service bulletins and are often linked to driving patterns and maintenance.
The K9K 812 was primarily used in the Renault Clio IV (2012-2019), Renault Captur (2013-2019), and Renault Twingo III (2014-2021). It was also found in Dacia models like the Sandero II and Logan II (2012-2020) as the dCi 90, under the Renault-Nissan-Dacia alliance.
Aftermarket ECU tuning is common on the K9K-812 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. In a Renault Clio Energy dCi 90, expect combined figures of around 3.8 L/100km (74 mpg UK). Real-world economy is typically 4.5-5.0 L/100km (56-63 mpg UK) in mixed driving, making it one of the most economical diesels of its generation, especially in Euro 6 guise.
Yes. The K9K 812 is an interference engine. If the timing chain fails or jumps, the pistons will collide with the valves, causing catastrophic internal damage. Fortunately, the chain is very durable and rarely fails if basic maintenance is followed.
Renault specifies RN0700 or RN0710 specification oil, typically SAE 5W-30. For all models, but especially DPF-equipped Euro 5 and Euro 6 variants, a low-SAPS (Sulphated Ash, Phosphorus, Sulphur) oil is mandatory to prevent DPF clogging. Always use a high-quality synthetic oil.
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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.
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