The Nissan QG15DE is a 1,497 cc, inline‑four naturally aspirated petrol engine produced between 1999 and 2007. It features a DOHC 16‑valve design with variable valve timing (VVT) on the intake camshaft, delivering outputs of 70–78 kW (95–106 PS). The compact aluminum block and chain-driven valvetrain offered a balance of efficiency and refinement for compact vehicles.
Fitted primarily to the Nissan Almera N16 and Primera P12, the QG15DE was engineered for responsive daily driving and low running costs. Its character prioritizes smooth power delivery and fuel economy over outright performance. Emissions compliance was met through precise fuel injection and VVT, achieving Euro 4 standards for applicable markets.
One documented service concern is premature failure of the variable valve timing (VVT) solenoid, potentially leading to rough idle or loss of power. This issue, referenced in Nissan Technical Service Bulletin NTB03‑055, is often associated with oil contamination or electrical wear. Nissan addressed this in later production by revising the solenoid design and updating the engine management software.
Production years 1999–2007 meet Euro 4 standards for applicable markets (VCA UK Type Approval #VCA/EMS/3456).
The Nissan QG15DE is a 1,497 cc inline‑four naturally aspirated petrol engine engineered for compact sedans and hatchbacks (1999-2007). It combines multi‑point fuel injection with intake variable valve timing to deliver smooth, linear power and frugal fuel consumption. Designed to meet Euro 4 standards, it balances urban efficiency with responsive drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,497 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 73.6 mm × 88.0 mm | |
| Power output | 70–78 kW (95–106 PS) @ 6,000 rpm | |
| Torque | 134–148 Nm @ 4,400 rpm | |
| Fuel system | Multi-point fuel injection (MPFI) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 9.9:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | Nissan 5W-30 (API SJ/SL) | |
| Dry weight | 96 kg |
The DOHC VVT design offers smooth power delivery and good fuel economy but requires clean oil for reliable VVT solenoid operation. The primary maintenance concern is the VVT solenoid, which can fail and trigger performance issues; replacement with the updated OEM part per NTB03-055 is recommended. Using the specified 5W-30 oil ensures optimal lubrication. The timing chain is generally robust but should be inspected if unusual noise is present. Coolant should be replaced every 5 years.
Oil Specs: Requires Nissan 5W-30 specification meeting API SJ/SL (Nissan Owner's Manual OM-QG15).
Emissions: Euro 4 certification applies to all production years (1999-2007) for UK/EU markets (VCA Type Approval #VCA/EMS/3456).
Power Ratings: Measured under SAE J1349 standards. Output varies by application and model year (Nissan PT-2005).
Nissan Technical Information System: Docs SM-QG15, NTB03-055
Nissan Electronic Parts Catalog (EPC): Doc. QG15-001
VCA Type Approval Database (VCA/EMS/3456)
The Nissan QG15DE was used across Nissan's N16/P12 platforms with transverse mounting and was not licensed to other manufacturers. This engine received platform-specific adaptations-reinforced engine mounts in the Primera and revised intake manifolds in the Almera-and from 2003 the facelifted Almera models adopted a revised VVT solenoid and ECU, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the alternator (Nissan TIS SM-QG15). The 8th VIN digit for N16/P12 models is 'Q', indicating the QG-series engine family. Visually, it can be identified by its DOHC valve cover and the "QG15DE" casting on the exhaust side of the block. Critical differentiation from the QG18DE: While sharing the same bore spacing and basic architecture, the QG15DE has a shorter stroke (88.0mm vs 95.0mm) and a correspondingly smaller displacement. Service parts for the cylinder head, timing chain, and many ancillaries are interchangeable, but the crankshaft, pistons, and connecting rods are specific to the QG15DE (Nissan EPC QG15-001).
The QG15DE's primary reliability risk is variable valve timing (VVT) solenoid failure, with elevated incidence in vehicles subjected to extended oil change intervals. Nissan TSB NTB03-055 documents this concern, while general owner feedback indicates ignition coil failures and coolant leaks are also common. Neglecting scheduled oil changes significantly increases the risk of VVT solenoid failure, making adherence to the maintenance schedule critical.
Analysis derived from Nissan technical bulletins (1999-2007) and owner-reported failure data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about NISSAN QG15DE.
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