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 (VCA UK Type Approval #VCA/EMS/9876).
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.
The K9K 812's primary reliability risk is DPF regeneration issues, with elevated incidence in vehicles subjected to frequent short urban journeys. Renault internal service data indicates a high frequency of DPF-related faults in low-mileage vehicles, while UK DVSA records show DPF warning lights as a common MOT advisory item for Euro 6 models. Short trip cycles prevent the system from reaching optimal operating temperature, making periodic highway driving and correct oil specification critical.
Analysis derived from Renault technical bulletins (2012-2021) and UK DVSA failure statistics (2018-2023). 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.
Yes, the K9K 812 responds well to ECU remapping. Stage 1 tunes can safely increase power to around 120-130 PS and torque to 240-260 Nm. The variable-geometry turbo helps manage the extra boost. Supporting modifications like a better intercooler are recommended for sustained performance and longevity.
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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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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