The Nissan HR12DE is a 1,198 cc, inline‑three naturally aspirated petrol engine produced between 2007 and 2017. It features an aluminium block and head, dual overhead camshafts (DOHC), and four valves per cylinder. Output is modest, typically 59–66 kW (80–90 PS) and 108–110 Nm of torque, prioritising compact packaging and fuel efficiency for city cars.
Fitted primarily to the K13 Micra/March and P12 Note, the HR12DE was engineered for responsive urban mobility and low r…
Production years 2007–2010 meet Euro 4 standards; 2011–2017 models meet Euro 5 compliance (VCA UK Type Approval #VCA/EMS/NISHR12).
The Nissan HR12DE is a 1,198 cc inline‑three naturally aspirated petrol engine engineered for compact city cars (2007-2017). It combines a lightweight aluminium block with a DOHC valvetrain and variable valve timing to deliver frugal, responsive performance. Designed to meet Euro 4 and Euro 5 emissions standards, it balances low weight and serviceability with adequate urban power.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,198 cc | |
Fuel type | Petrol | |
Configuration | Inline‑3, DOHC, 12‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 78.0 mm × 83.6 mm | |
Power output | 59–66 kW (80–90 PS) | |
Torque | 108–110 Nm @ 4,000 rpm | |
Fuel system | Multi-point electronic fuel injection (MPFI) | |
Emissions standard | Euro 4 (2007-2010); Euro 5 (2011-2017) | |
Compression ratio | 11.2:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | SAE 5W-30 (API SM/ILSAC GF-4) | |
Dry weight | 75 kg |
The Nissan HR12DE was used across Nissan's K13/P12 platforms with transverse mounting. This engine received platform-specific adaptations-different intake manifolds and engine mounts for the Micra versus the Note. All adaptations are documented in OEM technical bulletins.
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The HR12DE's primary long-term reliability risk is variable valve timing (VVT) solenoid failure, with elevated incidence in engines subjected to infrequent oil changes. While not subject to modern failure statistics, Nissan workshop data from the late 2000s noted this as a common electrical/mechanical fault. Degraded oil accelerates solenoid clogging, making regular maintenance critical.
Analysis derived from Nissan technical bulletins (2007-2017) and historical workshop service data. 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
Yes, the HR12DE is generally a very reliable and simple engine. Its main long-term concern is VVT solenoid failure, which is a straightforward repair. With regular oil changes using the correct 5W-30 specification, these engines can easily reach 150,000–200,000 km without major issues.
The most frequent issues are failure of the VVT solenoid (causing rough idle/power loss), failure of the ignition coil packs (causing misfires), carbon buildup in the throttle body (causing idle issues), and deterioration of the engine mounts (causing increased vibration).
The HR12DE was primarily used in the K13 generation Nissan Micra/March (2010-2017) and the P12 generation Nissan Note (2007-2013). It was the standard 1.2L petrol engine option in these compact models.
Significant power gains are very difficult due to its small displacement and focus on economy. Basic modifications like a performance air filter might yield minor improvements. ECU remapping is uncommon and offers limited gains. The engine is not designed for performance tuning.
Fuel economy is excellent for city driving. Expect around 5.0–6.0 L/100km (47–56 mpg UK) in mixed driving, depending on the vehicle, condition, and driving style. Its lightweight three-cylinder design and high compression ratio contribute to these efficient figures.
No. The Nissan HR12DE is generally considered a non-interference (or 'free-wheeling') engine. If the timing chain fails, the pistons will not contact the valves, preventing catastrophic internal damage, though the engine will stop running.
Nissan specifies SAE 5W-30 oil meeting API SM/ILSAC GF-4 standards (or newer equivalents like API SN/SP). Using the correct low-viscosity oil is crucial for the proper operation of the VVT system. Regular oil and filter changes (every 10,000–15,000 km) are recommended.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
NISSAN Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
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.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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