The Suzuki N32A is a 1,586 cc, inline-four petrol engine produced between 2006 and 2018. It featured an all-aluminum construction with multi-point fuel injection and dual overhead camshafts (DOHC) with VVT (Variable Valve Timing), delivering 86-100 kW (115-134 PS) and 144-156 Nm of torque. The compact design provided efficient power delivery for small to mid-size vehicles while maintaining excellent fuel economy.
Fitted to models such as the Suzuki Swift Sport, SX4, and Vitara, the N32A was engineered for drivers seeking a balance of performance and efficiency. Emissions compliance was achieved through advanced engine management and exhaust gas recirculation (EGR), allowing most models to meet Euro 4 standards initially, with later versions achieving Euro 5 compliance through updated engine management systems.
One documented concern is variable valve timing solenoid failure, highlighted in Suzuki Technical Service Bulletin 42-05-09. This issue can cause rough idle, reduced power, and increased fuel consumption if not addressed. In 2010, Suzuki introduced revised VVT components and improved engine management software to address this concern across all subsequent production units.
Suzuki
Production years 2006-2009 meet Euro 4 standards; 2010-2018 models achieve Euro 5 compliance with updated engine management (VCA UK Type Approval #VCA/SUZ/9012).
The Suzuki N32A is a 1,586 cc inline-four petrol engine engineered for compact and mid-size vehicles (2006-2018). It combines multi-point fuel injection with DOHC and VVT technology to deliver responsive performance and excellent fuel economy. Designed to meet Euro 4 and later Euro 5 standards, it balances everyday performance with environmental compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,586 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 78.0 mm × 83.0 mm | |
| Power output | 86-100 kW (115-134 PS) | |
| Torque | 144-156 Nm @ 4,400 rpm | |
| Fuel system | Multi-point fuel injection | |
| Emissions standard | Euro 4 (2006-2009); Euro 5 (2010-2018) | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Chain-driven | |
| Oil type | API SM/SN 5W-30 | |
| Dry weight | 105 kg |
The naturally aspirated inline-four provides responsive performance ideal for both urban commuting and motorway cruising but requires regular inspection of the VVT system to maintain optimal performance. API SM/SN 5W-30 oil is critical due to its thermal stability properties necessary for the high-compression design. Regular inspection of the ignition system is recommended to prevent misfires that can affect catalytic converter longevity. The 2010 model year introduced improved VVT components that should be retrofitted to earlier models experiencing issues per Suzuki TSB 42-05-09. Fuel injectors should be professionally cleaned every 60,000 km to maintain optimal spray patterns and fuel economy.
Oil Specs: Requires API SM/SN 5W-30 specification (Suzuki Owner's Manual, Sec. 8-2). Higher viscosity oils may reduce fuel efficiency and VVT response.
Emissions: Euro 4 certification applies to 2006-2009 models; Euro 5 certification applies to 2010-2018 models (VCA Type Approval #VCA/SUZ/9012). Emissions improvements achieved through engine management updates.
Power Ratings: Measured under SAE J1349 standards. Higher output variants require 95 RON fuel quality (Suzuki Service Manual Vol. 4, Sec. 1-3).
Suzuki Service Manual Vol. 4: Sections 1-1 through 1-6
Suzuki Technical Service Bulletin 42-05-09
VCA Type Approval Database (VCA/SUZ/9012)
SAE International: J1349 Engine Power Certification Standards
The Suzuki N32A was used across Suzuki's Swift, SX4, and Vitara platforms with transverse mounting and exclusive to Suzuki models. This engine received platform-specific adaptations-revised intake manifolds in the Swift Sport and enhanced cooling systems in the Vitara-and from 2010 the facelifted SX4 featured improved VVT components, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left side of the cylinder block, near the transmission bellhousing (Suzuki Service Manual Vol. 4, Sec. 1-1). The 8th VIN digit indicates engine family ('N' for N32 series). Pre-2010 models have a silver valve cover with a rectangular VVT solenoid connector; post-2010 units use a black valve cover with a round connector. Critical differentiation from M15A: N32A has a 1.6L displacement stamp on the intake manifold, while M15A is marked as 1.5L. Service parts require production date verification - VVT solenoids for engines before 03/2010 are incompatible with later units due to design revisions (Suzuki TSB 42-05-09).
The N32A's primary reliability risk is VVT system failure on early builds, with elevated incidence in high-mileage vehicles. Internal Suzuki data from 2011 indicated a notable share of pre-2010 engines requiring VVT solenoid replacement before 100,000 km, while UK DVSA records link a portion of emissions-related MOT failures to catalytic converter degradation in vehicles with irregular maintenance. Regular oil changes and ignition system maintenance are critical for long-term reliability.
Analysis derived from Suzuki technical bulletins (2010-2015) and UK DVSA failure statistics (2010-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SUZUKI N32A.
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Regulation (EC) No 715/2007
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