🏷️ Basic Information

Make:

Daihatsu

Model:

Sirion

Alternate Model Name:

Boon

Generation Code:

M300 Series

Production Years:

2004-2010

👋 Introduction

Market Position:

The Daihatsu Sirion/Boon (M300 Series) is a subcompact or city car known for its affordability, fuel efficiency, and practicality, often targeting younger drivers or those seeking an economical urban transport solution. It competes in a segment with vehicles like the Toyota Yaris, Honda Jazz/Fit, and Suzuki Swift.

Competitive Analysis:

This manual provides essential technical data for servicing a vehicle that was designed with cost-effectiveness and reliability in mind. Its compact dimensions and efficient powertrains made it a strong contender in its segment, and maintaining it with a comprehensive service manual ensures its longevity and optimal performance.

Key Features:

This workshop manual is distinguished by its extensive page count, exhaustive coverage of all models and engines within the M300 series, and its digital accessibility (searchable, indexed, iPad-ready PDF). It aims to replicate the detail and accuracy found in official dealer service information.

📋 Manual Details

Coverage Areas:

All models and engines for the M300 Series

Page Count:

3,300+

Manual Type:

Workshop Service Repair Manual

Language:

English

File Format:

PDF

File Size Mb:

130MB

Ipad Ready:

Yes

Searchable Indexed:

Yes

📖 Manual Coverage

Systems Covered:

Engine Mechanical, Engine Control System, Cooling System, Fuel System, Exhaust System, Ignition System, Starting System, Charging System, Lubrication System, Emission Control Systems, Clutch System, Manual Transaxle System, Drive Shaft, Brake System, Parking Brake, Suspension Systems (Front & Rear), Steering System, Power Steering, Body Repair, Interior, Exterior Trim, Electrical System, Supplemental Restraint System (SRS), Air Conditioning System, Audio System, Instrumentation, Lighting System, Wiper & Washer System

Engine Mechanical:

Complete overhaul procedures for cylinder head, cylinder block, pistons, crankshaft, camshafts, valves, timing components (belt/chain), oil pump, and lubrication system.

Engine Control System:

Detailed diagnostics for ECU, sensors (e.g., crankshaft position, camshaft position, throttle position, oxygen), actuators, and fuel injection system.

Cooling System:

Radiator, water pump, thermostat, cooling fan, coolant hoses, and climate control integration.

Brake System:

Hydraulic brake system, brake master cylinder, brake boosters, brake calipers, brake pads, brake discs, parking brake mechanism, ABS components, and bleeding procedures.

Steering System:

Steering column, steering rack or gearbox, tie rod ends, power steering system (hydraulic pump, lines, reservoir), and steering angle sensors.

Suspension System:

Front suspension (struts, control arms, ball joints, sway bar), rear suspension (torsion beam, shock absorbers, coil springs), wheel alignment specifications.

Electrical System:

Comprehensive wiring diagrams, component locations, fuse/relay identification, starter system, charging system (alternator), battery, lighting circuits, power windows, power locks, wipers, horn, instrument cluster.

Supplemental Restraint System:

Airbag modules (front, side, curtain), airbag sensors, seat belt pre-tensioners, airbag control module diagnostics.

Emission Control Systems:

Catalytic converter, oxygen sensors, evaporative emission control (EVAP) system, EGR (if applicable).

Climate Control System:

Air conditioning system components (compressor, condenser, evaporator, refrigerant), heater core, blower motor, climate control modules.

Infotainment System:

Radio/audio system removal and installation, speaker wiring, antenna system.

Procedures Included:

Routine Maintenance, Scheduled Maintenance, Component Removal and Installation, Disassembly and Assembly, Troubleshooting, Diagnostic Procedures, Electrical System Diagnostics, Wiring Diagrams, Repair Procedures, Overhaul Procedures, Fluid Specifications, Torque Specifications, Component Specifications, Adjustments, Replacements, Reassembly Guidance

Engine Tune Up:

Spark plug replacement, ignition timing checks (if applicable), fuel filter replacement, air filter replacement, drive belt inspection/replacement.

Transmission Service:

Manual transmission fluid change, automatic transmission fluid and filter change, torque converter service, clutch replacement (manual), clutch actuator and slave cylinder service.

Brake Service:

Brake pad and rotor replacement, brake caliper service, brake fluid flush and replacement, parking brake adjustment, ABS bleeding.

Suspension And Steering Repair:

Shock absorber and strut replacement, ball joint replacement, tie rod end replacement, power steering pump replacement, steering rack overhaul.

Body And Interior Repair:

Door panel removal, seat removal, headliner repair, bumper removal/installation, panel replacement, weatherstrip replacement.

Troubleshooting Guides:

System-specific troubleshooting charts for common drivability, electrical, and mechanical issues, often with diagnostic flowcharts.

Timing Belt Or Chain Replacement:

Detailed procedures for inspection and replacement of timing belts or chains, tensioners, and idler pulleys, including critical timing marks and procedures.

Fuel System Diagnostics:

Fuel pump operation, fuel pressure testing, fuel injector cleaning and testing, fuel pressure regulator diagnostics.

Technical Depth:

Comprehensive (from basic maintenance to complete engine and transmission overhauls), detailed step-by-step instructions, diagnostic flowcharts, specific technical notes, cautions, and warnings.

Diagnostic Tools Requirements:

While not explicitly stated, a manual of this depth implies the need for basic hand tools, torque wrenches, multimeter, and potentially a scan tool for accessing diagnostic trouble codes (DTCs) for electronic systems.

📊 Manual Specifications

File Format Detail:

Searchable, Indexed PDF

Print Quality:

High-resolution scans, all pages printable

Binding Type:

Digital Download (no physical binding)

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine:

The M300 Series Sirion/Boon was typically equipped with inline 3-cylinder and inline 4-cylinder gasoline engines. Common variants include the 1.0L (K3-VE) and 1.3L (K3-VE or K3-VET turbo). Specific engine codes like 1KR-FE (1.0L 3-cylinder VVT-i) are also prevalent for this generation.

Performance Overview:

Engines prioritize fuel economy and urban drivability. Horsepower ratings typically range from approximately 65-70 hp for the 1.0L engines and 85-100 hp for the 1.3L engines. Turbocharged variants (K3-VET) offered higher output.

Engine Displacements:

1.0 Liters (996 cc), 1.3 Liters (1298 cc)

Fuel System:

Electronic Fuel Injection (EFI) with multi-point injection is standard across the range. The manual will detail fuel pump pressures, injector specifications, and diagnostic procedures for the fuel delivery system.

Common Engine Codes:

1KR-FE (1.0L 3-cylinder), K3-VE (1.3L 4-cylinder), K3-VET (1.3L Turbocharged 4-cylinder)

🔧 Transmission

Standard Transmission:

A 5-speed manual transmission was a common standard offering.

Optional Transmission:

A 4-speed automatic transmission was widely available as an option. Some models may also feature a Continuously Variable Transmission (CVT).

Transmission Features:

The manual covers maintenance, diagnosis, and repair of both manual and automatic transmissions, including clutch operation, torque converter functionality (for automatics), and gear shifting mechanisms.

📐 Dimensions

Exterior Dimensions Overview:

As a subcompact car, the M300 Sirion/Boon features compact exterior dimensions, optimized for urban maneuverability. Length typically around 3.6-3.8 meters, width around 1.6-1.7 meters, and height around 1.5-1.6 meters.

Interior Space Overview:

Despite its exterior size, Daihatsu typically designed the interior for maximum space utilization, often featuring a higher roofline and clever storage solutions.

Cargo Capacity Overview:

Cargo space is functional for its class, with rear seats often folding to expand capacity. The manual will detail any specific procedures related to rear seat folding mechanisms or cargo area components.

Curb Weight Range:

Curb weights typically range from approximately 900-1050 kg, depending on engine and transmission.

🛡️ Safety Features

Safety Ratings Overview:

Safety ratings varied by region and testing body. The manual will provide information on the Supplemental Restraint System (SRS) including airbags and seatbelt pre-tensioners, and braking system components which contribute to active safety.

Active Safety Features:

While base models might have limited active safety features, higher trims or optional packages could include Anti-lock Braking System (ABS) and Electronic Brakeforce Distribution (EBD). The manual extensively covers brake system diagnostics and repair.

Passive Safety Features:

Standard passive safety features include seatbelts, front airbags. Some models may also feature side airbags and curtain airbags. The manual details the SRS system, including airbag sensor locations and diagnostic procedures.

💡 Technology Features

Infotainment Overview:

Infotainment systems in this era were typically basic, often featuring a single-DIN or double-DIN radio with CD player. Options for satellite navigation were less common. The manual covers radio removal/installation and basic speaker system diagnostics.

Driver Assistance Features:

Driver assistance features were limited in this generation, primarily focusing on core safety systems like ABS and airbags. Advanced electronic aids were not common.

Connectivity Features:

Connectivity was generally limited to auxiliary audio inputs or early Bluetooth integration on higher trims. The manual will detail wiring for these systems.

🔧 Maintenance

Service Intervals Overview:

The manual will detail recommended service intervals for oil changes, filter replacements, spark plugs, brake fluid, coolant, and other critical maintenance items, typically based on mileage or time.

Engine Oil Specification:

Referencing the manual for specific engine oil viscosity (e.g., 0W-20, 5W-30) and API/ACEA specifications is crucial. Capacities for engine oil, coolant, transmission fluid, and brake fluid will be provided.

Coolant Specification:

Typically requires a high-quality, long-life ethylene glycol-based coolant. Specific mixture ratios and part numbers will be detailed.

Transmission Fluid Specification:

Automatic transmission models will require specific ATF fluid (e.g., Dexron III/VI or equivalent). Manual transmission models will specify gear oil viscosity and type.

Brake Fluid Specification:

DOT 3 or DOT 4 brake fluid is typically specified.

Power Steering Fluid Specification:

Refer to manual for specific type, often Dexron or equivalent ATF or dedicated power steering fluid.

Manual Transmission Fluid Specification:

Typically GL-4 gear oil with a viscosity like 75W-90 or 80W-90.

Engine Oil Capacity:

Approx. 3.0-3.5 liters for 1.0L engine, 3.5-4.0 liters for 1.3L engine (including filter), subject to verification in manual.

Common Issues Overview:

While generally reliable, common issues can include minor electrical gremlins, wear in suspension components due to typical urban use, and occasional catalytic converter issues. The manual's troubleshooting section is invaluable for addressing these.

Common Wear Items:

Suspension bushings, front anti-roll bar links, clutch wear (manual transmission), exhaust system corrosion over time.

📚 Vehicle History

Brand Heritage:

Daihatsu, a subsidiary of Toyota, has a long history of producing compact and economical vehicles, often focusing on reliability and value. This heritage is reflected in the design and engineering of the Sirion/Boon.

Model Evolution:

The M300 Series represents a significant evolution for the Sirion/Boon, offering a more modern design, improved interior packaging, and updated powertrain options compared to its predecessors. It was designed to meet global demand for efficient and practical small cars.

Production Locations:

The M300 Series was primarily manufactured by Daihatsu in Japan, and also produced in other global locations through various joint ventures or licensing agreements.

🏆 Awards & Recognition

Awards And Recognitions:

The Daihatsu Sirion/Boon has received recognition in various markets for its fuel efficiency, affordability, and maneuverability, often being a popular choice in city car categories and receiving good consumer satisfaction ratings in specific regions.