Segment:
Subcompact / City Car
Positioning Statement:
The Mazda 121 DB1 was a highly popular and affordable subcompact car known for its reliability and efficient operation, making it a strong contender in its segment.
Key Competitors:
Ford Fiesta, Opel/Vauxhall Corsa, Volkswagen Polo, Nissan Micra, Honda Logo (depending on market)
Manual Advantage:
This manual is presented as the 'COMPLETE official full factory service repair manual', offering unparalleled depth for maintenance and repair compared to generic guides.
Value Proposition:
An inexpensive way to keep the vehicle working properly by providing expert-level repair information.
Engine Mechanical:
Yes (including disassembly, assembly, and repair of all engine components)
Fuel System:
Yes (including fuel injection, carburetor adjustments, fuel pump, and lines)
Ignition System:
Yes (including spark plugs, coils, distributors, and timing)
Cooling System:
Yes (radiator, thermostat, water pump, hoses, fan)
Exhaust System:
Yes (catalytic converter, muffler, pipes)
Transmission Manual:
Yes (clutch, gearbox, internal components, fluid changes)
Transmission Automatic:
Yes (where applicable, including torque converter, valve body, fluid changes)
Drivetrain:
Yes (driveshafts, CV joints, differential)
Suspension Front:
Yes (struts, control arms, bushings, alignment)
Suspension Rear:
Yes (shocks, trailing arms, bushings, alignment)
Steering System:
Yes (power steering pump, rack and pinion, steering column)
Braking System:
Yes (discs, pads, calipers, drums, master cylinder, ABS diagnostics where applicable)
Electrical System:
Yes (comprehensive coverage including starter, alternator, battery, lighting)
Wiring Diagrams:
Yes (detailed diagrams for ease of electrical troubleshooting)
Climate Control:
Yes (HVAC system, A/C compressor, heater core, controls)
Body Interior:
Yes (trim removal, seat adjustments, dashboard components)
Body Exterior:
Yes (panels, doors, glass, bumpers, trim)
Chassis Frame:
Yes (structural components, rust repair considerations)
Safety Systems:
Yes (seatbelts, airbags where equipped, basic safety component checks)
Routine Maintenance:
Yes (oil changes, filter replacements, fluid checks)
Troubleshooting:
Yes (diagnostic procedures for common and uncommon issues)
Repair Procedures:
Yes (step-by-step instructions for component repair and replacement)
Rebuilding Procedures:
Yes (detailed instructions for major component rebuilds, e.g., engines, transmissions)
Diagnostics:
Yes (including electrical system diagnostics and fault code interpretation where applicable)
Alignment Procedures:
Yes (wheel alignment specifications and adjustments)
Component Identification:
Yes (detailed illustrations and diagrams)
Depth:
Complete factory level (suitable for professional mechanics and advanced DIYers)
Illustrations:
Hundreds of photos and illustrations
Detail Level:
Step-by-step instructions with substeps, notes, cautions, and warnings
Engine Code Examples:
B3, B5, B6 (common engine codes used by Mazda)
Engine Type Examples:
1.1L (B1), 1.3L (B3), 1.4L (B4), 1.5L (B5), 1.6L (B6) inline-4 gasoline engines
Horsepower Range Typical:
50-90 PS (approx. 49-89 bhp), depending on engine displacement and tuning
Torque Range Typical:
80-120 Nm (approx. 59-89 lb-ft), depending on engine displacement
Fuel Delivery Types:
Carbureted and Electronic Fuel Injection (EFI), depending on engine and market
Oil Change Interval:
Typically 5,000-7,500 miles (8,000-12,000 km) or 6-12 months, depending on driving conditions and oil type.
Timing Belt Replacement:
Recommended every 60,000-90,000 miles (96,000-144,000 km) for interference engines; consult manual for specific engine code.
Engine Oil Type Common:
API SG or higher, SAE 10W-30 or 10W-40 (check manual for exact specifications based on engine and climate).
Coolant Type:
Ethylene glycol-based antifreeze (typically green), mixed 50/50 with distilled water.
Transmission Fluid Manual:
GL-4 gear oil, SAE 75W-90 or 75W-85 (check manual for precise specification).
Transmission Fluid Automatic:
Dexron II or equivalent (check manual for exact specification).
Common Wear Items:
Suspension bushings, wheel bearings, clutch wear, exhaust system corrosion, rust (particularly on sills and wheel arches).
Electrical Issues Common:
Corroded electrical connectors, faulty door lock actuators, intermittent dashboard warning lights.
Engine Performance Issues:
Carburetor or fuel injector cleaning, ignition timing adjustment, vacuum leaks.