Vehicle Segment:
        
        
            Compact/Sport Compact
        
     
    
        
            Positioning Statement:
        
        
            The Mazda3 and its high-performance variant, the Mazdaspeed3, represented Mazda's commitment to 'Zoom-Zoom' driving dynamics within the highly competitive compact car segment.
        
     
    
    
        
            Key Competitors:
        
        
            Honda Civic Si, Volkswagen GTI, Subaru WRX, Mitsubishi Lancer Ralliart/Evolution.
        
     
    
    
        
            Mazda3 Strengths:
        
        
            Sharp handling, stylish design, refined interior, fuel efficiency (standard models).
        
     
    
        
            Mazdaspeed3 Strengths:
        
        
            Potent turbocharged engine, aggressive styling, performance-oriented suspension, sport seats, limited-slip differential.
        
     
    
    
        
            Target Audience:
        
        
            DIY mechanics, independent repair shops, performance enthusiasts, owners seeking in-depth maintenance and repair knowledge.
        
     
 
    
    
    
        
            Engine Mechanical:
        
        
            Engine assembly, cylinder head, crankshaft, pistons, connecting rods, camshafts, timing system, lubrication system, cooling system, fuel injection, ignition system (for both naturally aspirated and turbocharged engines).
        
     
    
        
            Engine Performance:
        
        
            Turbocharger system (for Mazdaspeed3), boost control, intercooler, ECU tuning (diagnostic aspects).
        
     
    
        
            Transmission:
        
        
            Manual transmission (MT) and Automatic transmission (AT) service, repair, overhaul, clutch system, differential, drivetrain components.
        
     
    
        
            Brakes:
        
        
            Brake system components, hydraulic systems, ABS, DSC (Dynamic Stability Control), brake rotor and pad replacement, caliper service, parking brake.
        
     
    
        
            Suspension Steering:
        
        
            Front and rear suspension components (struts, shocks, control arms, bushings), steering system, power steering, wheel alignment specifications.
        
     
    
        
            Electrical Electronics:
        
        
            Wiring diagrams, fuses, relays, battery, charging system, starting system, lighting system, instrument cluster, power windows, door locks, mirrors, audio system, climate control ECU.
        
     
    
        
            Body Chassis:
        
        
            Body panel repair, door, hood, trunk, bumper removal/installation, interior trim, structural components, rust prevention.
        
     
    
        
            HVAC:
        
        
            Heating, ventilation, and air conditioning system diagnosis, refrigerant handling, component replacement (compressor, condenser, evaporator).
        
     
    
        
            Safety Restraints:
        
        
            Airbag system diagnosis, SRS components, seat belt service.
        
     
    
    
        
            Maintenance:
        
        
            Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, spark plug replacement, brake pad replacement.
        
     
    
        
            Troubleshooting:
        
        
            Diagnostic charts, symptom-based troubleshooting, common fault identification, wiring diagram interpretation.
        
     
    
        
            Repair:
        
        
            Step-by-step repair procedures for all major vehicle systems, including engine rebuild, transmission overhaul, suspension component replacement, electrical diagnostics and repair.
        
     
    
        
            Diagnostics:
        
        
            OBD-II diagnostics, diagnostic trouble codes (DTCs), sensor testing, actuator testing, ECU diagnostic procedures.
        
     
    
    
        
            Depth Level:
        
        
            Comprehensive (from basic maintenance to complete engine and transmission rebuilds, advanced electrical diagnostics).
        
     
 
    
    
    
        
            Mazda3 Engine Mzr 2 5L:
        
        
            2.5L naturally aspirated inline-4 (L5-VE), DOHC, 16 valves, variable valve timing (S-VT).
        
     
    
        
            Mazdaspeed3 Engine Mzr 2 3L Turbo:
        
        
            2.3L turbocharged MZR DISI direct-injection inline-4 (L3-VDT).
        
     
    
    
        
            Mazda3 2 5L Hp:
        
        
            167 hp @ 6000 rpm
        
     
    
        
            Mazda3 2 5L Torque:
        
        
            168 lb-ft @ 4000 rpm
        
     
    
        
            Mazdaspeed3 2 3L Turbo Hp:
        
        
            263 hp @ 5500 rpm
        
     
    
        
            Mazdaspeed3 2 3L Turbo Torque:
        
        
            280 lb-ft @ 3000 rpm
        
     
    
    
        
            Mazda3 Fuel System:
        
        
            Electronic Port Fuel Injection (MPI)
        
     
    
        
            Mazdaspeed3 Fuel System:
        
        
            Direct Injection (DISI) with turbocharging
        
     
    
    
        
            Fuel Requirement Mazda3:
        
        
            87 Octane (Recommended)
        
     
    
        
            Fuel Requirement Mazdaspeed3:
        
        
            91 Octane (Premium Unleaded Required)
        
     
 
    
    
    
        
            Transmission Type Mazda3:
        
        
            6-speed Manual Transmission (M5-NP1 for early models, potentially others)
        
     
    
    
        
            Transmission Type Mazda3 Auto:
        
        
            5-speed Automatic Transmission (FS5A-EL/FW5A-EL)
        
     
    
    
        
            Transmission Type Mazdaspeed3:
        
        
            6-speed Manual Transmission (MZR MMT6)
        
     
    
    
        
            Limited Slip Differential:
        
        
            Yes (Standard on Mazdaspeed3)
        
     
    
    
        
            Manual Transmission Fluid:
        
        
            Refer to manual for specific GL-4 or GL-5 specification, and viscosity (e.g., 75W-90).
        
     
    
        
            Automatic Transmission Fluid:
        
        
            Mazda ATF-SP-III or equivalent.
        
     
 
    
    
    
        
            Length Overall:
        
        
            Approximately 176.8 - 177.1 inches (4491 - 4498 mm) depending on model/trim
        
     
    
        
            Width Overall:
        
        
            Approximately 69.1 - 70.1 inches (1755 - 1780 mm) depending on model/trim
        
     
    
        
            Height Overall:
        
        
            Approximately 57.9 - 58.7 inches (1470 - 1491 mm) depending on model/trim
        
     
    
    
        
            Curb Weight Estimate:
        
        
            Approx. 3000-3300 lbs (1360-1500 kg) for Mazda3, Approx. 3100-3350 lbs (1406-1520 kg) for Mazdaspeed3
        
     
    
        
            Wheelbase:
        
        
            Approximately 103.9 inches (2640 mm)
        
     
    
        
            Wheel Bolt Pattern:
        
        
            5 x 114.3 mm (5 x 4.5 inches)
        
     
 
    
    
    
        
            NHTSA Front Crash Test:
        
        
            5-Star (for driver and passenger) for 2010-2011 models (typical).
        
     
    
        
            IIHS Front Crash Test:
        
        
            Good (for 2010-2011 models).
        
     
    
        
            IIHS Side Impact Test:
        
        
            Good (for 2010-2011 models).
        
     
    
    
        
            Traction Control:
        
        
            Standard on most trims, advanced DSC on Mazdaspeed3.
        
     
    
        
            Electronic Brakeforce Distribution:
        
        
            EBD (Standard)
        
     
    
        
            Brake Assist:
        
        
            BA (Standard)
        
     
    
    
        
            Airbags:
        
        
            Front airbags, front side-impact airbags, side-curtain airbags (standard on most trims).
        
     
    
        
            Seatbelts:
        
        
            Pretensioners and load limiters for front seats.
        
     
 
    
    
    
        
            Infotainment System:
        
        
            Mazda's optional Bose audio system, SiriusXM satellite radio, CD player, MP3 input, Bluetooth hands-free phone and audio streaming (on higher trims).
        
     
    
    
        
            Adaptive Front Lighting System:
        
        
            AFS (Optional, on higher trims and specific packages).
        
     
    
        
            Keyless Entry Start:
        
        
            Push-button start and keyless entry (Optional/Higher Trims).
        
     
    
    
        
            Bluetooth:
        
        
            Standard on many trims for hands-free calling and audio streaming.
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Every 5,000 miles or 6 months (typical, consult manual for exact recommendation).
        
     
    
        
            Engine Air Filter Replacement:
        
        
            Every 15,000-30,000 miles (typical).
        
     
    
        
            Cabin Air Filter Replacement:
        
        
            Every 15,000-30,000 miles (typical).
        
     
    
        
            Spark Plug Replacement 2 5L:
        
        
            Approximately 75,000 miles (NGK Iridium type, refer to manual for part number).
        
     
    
        
            Spark Plug Replacement 2 3L Turbo:
        
        
            Approximately 45,000 miles (NGK Iridium type, specific heat range crucial).
        
     
    
    
        
            Engine Oil Type Mazda3:
        
        
            SAE 5W-20, API SN/SP or ILSAC GF-5/GF-6 (Consult manual for exact spec).
        
     
    
        
            Engine Oil Type Mazdaspeed3:
        
        
            SAE 5W-30 or 0W-30 Full Synthetic, API SN/SP or ILSAC GF-5/GF-6 (Higher viscosity recommended due to turbocharging).
        
     
    
        
            Coolant Type:
        
        
            Mazda FL22 Long Life Antifreeze/Coolant (Green) or equivalent HOAT coolant.
        
     
    
        
            Brake Fluid Type:
        
        
            DOT 3 or DOT 4 (Consult manual).
        
     
    
    
        
            Clutch Wear Mazdaspeed3:
        
        
            Early clutch wear can be an issue for aggressively driven Mazdaspeed3 models.
        
     
    
        
            Turbocharger Oil Feed Line:
        
        
            Potential for oil coking/blockage in the turbo oil feed line on Mazdaspeed3 if maintenance is neglected or hot shutdown practices are not followed.
        
     
    
        
            Engine Mounts:
        
        
            Some reports of premature engine mount wear on both models, particularly the passenger side mount.
        
     
    
        
            Power Steering Pump:
        
        
            Occasional reports of power steering pump noise or failure.