Engine Mechanical:
Complete overhaul procedures, component testing, diagnostics, timing belt replacement, cooling system, lubrication system, fuel injection system, emissions control.
Engine Control:
ECU diagnostics, sensor testing, actuator operation, wiring diagrams, OBD-I diagnostic codes.
Transmission Manual:
Overhaul, clutch service, gear selection mechanisms, diagnostic procedures.
Transmission Automatic:
Overhaul, torque converter service, hydraulic control system, electronic controls (if applicable), diagnostic procedures.
Drivetrain:
Axles, CV joints, driveshafts, differential service, hub bearings.
Suspension:
Front and rear suspension component replacement, alignment specifications, shock absorber/strut service, spring replacement.
Steering:
Power steering system, rack and pinion service, steering column, wheel alignment.
Brakes:
Disc and drum brake service, hydraulic system, ABS (if equipped), brake pad/shoe replacement, rotor/drum resurfacing, bleeding procedures.
Electrical System:
Battery, charging system (alternator, starter), ignition system, lighting, gauges, power windows/locks, wipers, horn.
Body And Chassis:
Exterior panel repair, interior trim, door mechanisms, glass replacement, rust prevention, chassis lubrication.
HVAC:
Air conditioning system service and repair, heater core replacement, blower motor, controls.
Routine Maintenance:
Oil and filter changes, fluid checks and top-offs, spark plug replacement, air filter replacement, tire rotation, brake inspection.
Troubleshooting:
Diagnostic charts for common drivability issues, electrical faults, and mechanical problems.
Repair Procedures:
Step-by-step instructions for component removal, installation, and adjustment for all major systems.
Diagnostic Procedures:
Methods for identifying the root cause of malfunctions, including wiring diagrams and test procedures for sensors and actuators.
Specifications And Measurements:
Torque specifications, clearances, fluid capacities, electrical specifications, alignment data.
Depth Of Coverage:
Comprehensive; covers basic maintenance to full engine and transmission rebuilds.
Diagnostics Level:
Advanced diagnostics, including component-level testing and interpretation of diagnostic trouble codes (DTCs).
Wiring Diagrams:
Detailed electrical wiring diagrams for all vehicle systems, including troubleshooting guides.
Federal Crash Test Ratings:
Variable based on year and testing agency; generally considered competitive for its era.
ABS:
Optional on some models, standard on higher trims (e.g., GT).
Airbags:
Driver's side airbag standard from mid-cycle, passenger airbag optional/later standard.
Seatbelts:
Front 3-point retractable, rear 3-point and lap belts.
Oil Change Interval:
Every 7,500 miles (12,000 km) or 6 months, whichever comes first.
Engine Oil Filter Replacement:
With every oil change.
Engine Air Filter:
Inspect every 15,000 miles (24,000 km), replace as needed.
Timing Belt:
Replace every 60,000 miles (96,000 km) or 5 years, due to non-interference engine design. (Consult manual for specific engine codes as interference can vary).
Transmission Fluid Change:
Manual: Check periodically, replace if contaminated. Automatic: Every 30,000 miles (48,000 km) or as per manual's severe service schedule.
Engine Oil Type:
API SJ or higher, ILSAC GF-2 or higher, SAE 5W-30 or 10W-30 (check owner's manual for climate variations).
Engine Coolant:
Ethylene glycol-based antifreeze (e.g., Mazda Genuine Super Long Life Coolant or equivalent) mixed 50/50 with distilled water.
Brake Fluid:
DOT 3 or DOT 4.
Transmission Fluid Manual:
API GL-4 SAE 75W-90 or 80W-90 gear oil.
Transmission Fluid Automatic:
Mazda ATF-III or DEXRON III/MERCON compatible.
Engine Idle Instability:
Can be caused by vacuum leaks, dirty throttle body, or faulty Idle Air Control (IAC) valve.
Clutch Wear:
Wear items, replacement recommended based on mileage and driving conditions.
Rear Suspension Bushings:
Can degrade over time, leading to knocking sounds and poor handling.
Rust Ingress:
Wheel arches, rocker panels, and subframes are common areas for rust on older vehicles.
Radiator Leaks:
Can develop leaks due to age and heat cycling.
Mazda Philosophy:
Focus on driver engagement ('Zoom-Zoom' predecessor), affordability, and reliability.
Bg Generation Introduction:
Introduced globally for the 1989 model year, replacing the previous Familia/323 BD generation.
Updates During Production:
Minor styling tweaks, equipment updates, and introduction of the performance-oriented GT model with the BP engine.
Manufacturing Location:
Japan
Lifespan Of Generation:
1989-1994 (North America market for BG generation).
