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 running costs. Emissions compliance for its production period was met through multi-point electronic fuel injection and a three-way catalytic converter, aligning with Euro 4 and Euro 5 standards depending on model year and market.
One documented concern is premature failure of the variable valve timing (VVT) solenoid, which can lead to rough idle, reduced power, and illuminated warning lights. This issue, referenced in Nissan service documentation for the K13 platform, is often attributed to internal contamination from degraded engine oil or sludge buildup.
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 DOHC design with VVT offers good low-end response for city driving but requires strict oil change adherence to prevent solenoid clogging. Check and replace the VVT solenoid if rough idle or power loss occurs. The chain-driven timing system is generally reliable for the engine's lifespan but inspect for tensioner noise at very high mileage. Using the correct low-viscosity 5W-30 oil is critical for VVT system function and overall engine protection.
Oil Specs: Requires SAE 5W-30 specification meeting API SM/ILSAC GF-4 (Nissan SM-HR12). Modern API SN/SP equivalents are acceptable.
Emissions: Euro 4 certification applies to 2007-2010 models; Euro 5 for 2011-2017 (VCA Type Approval #VCA/EMS/NISHR12).
Power Ratings: Measured under DIN 70020 or JIS D 1001 standards depending on market (Nissan Global Product Data 2010).
Nissan Service Manual (SM-HR12)
Nissan Technical Bulletin (TB-08-022)
Nissan EPC (HR12DE)
VCA UK Type Approval Database (VCA/EMS/NISHR12)
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.
Locate the engine code stamped on the flat machined surface at the rear of the cylinder block, near the transmission bellhousing (Nissan SM-HR12). The 8th VIN digit often corresponds to the engine type. Visually, the HR12DE can be identified by its single cam cover (housing both cams) and distributorless ignition system (coil packs). Differentiate from the HR10DE by displacement (1.2L vs 1.0L) and from the HR16DE by cylinder count. Service parts are generally consistent across applications but verify part numbers against the specific chassis code (K13, P12) as ancillary components may differ.
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.
Find answers to most commonly asked questions about NISSAN HR12DE.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with NISSAN or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialNISSAN documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
