Segment:
Compact Executive / Sport Sedan
Target Audience:
Enthusiast owners, independent repair shops, DIY mechanics
Competitors 1985:
Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75, Volvo 240, Ford Sierra
Engineering Philosophy:
Rear-wheel drive, balanced chassis, driver-focused ergonomics
Performance Orientation:
Known for sharp handling and responsive steering
Value Proposition:
Essential for maintaining the longevity and performance of a classic BMW
Diagnostic Aid:
Empowers owners and technicians with the knowledge to diagnose and repair complex issues
Engine Mechanical:
Engine overhaul, cylinder head, block, pistons, crankshaft, camshafts, timing
Fuel System:
Fuel injection (Bosch L-Jetronic), fuel pump, injectors, fuel lines, evaporative emissions control
Ignition System:
Ignition coils, distributor, spark plugs, timing control
Cooling System:
Radiator, thermostat, water pump, hoses, fan clutch
Exhaust System:
Exhaust manifold, catalytic converter (if applicable), muffler, pipes
Transmission Manual:
Clutch, gearbox overhaul, shift linkage, driveshafts
Transmission Automatic:
Automatic transmission overhaul, hydraulic control, torque converter, shift linkage
Suspension Front:
MacPherson struts, control arms, anti-roll bar, bushings
Suspension Rear:
Independent trailing arm suspension, shock absorbers, springs, bushings
Steering System:
Steering rack, tie rods, steering column, power steering (if equipped)
Braking System:
Front discs, rear drums (typical for 318i), brake calipers, master cylinder, brake lines, parking brake
Electrical System Charging:
Alternator, voltage regulator, battery
Electrical System Starting:
Starter motor, ignition switch
Lighting System:
Headlights, taillights, interior lighting, wiring diagrams
Instrumentation:
Dashboard gauges, warning lights, tachometer, speedometer
HVAC System:
Heater core, blower motor, ventilation controls, A/C system (if equipped)
Body And Chassis:
Body panel repair, frame specifications, door mechanisms, glass replacement
Interior:
Seat removal, trim panel replacement, dashboard disassembly
Wiring Diagrams:
Comprehensive electrical schematics for all systems
Routine Maintenance:
Oil changes, filter replacements, spark plug replacement, fluid checks
Troubleshooting:
Diagnostic procedures for common and uncommon faults, fault codes (if applicable)
Engine Repair:
Complete engine rebuild procedures, component replacement
Transmission Repair:
Manual and automatic gearbox overhauls, clutch replacement
Suspension And Steering Repair:
Component replacement, alignment specifications
Brake System Repair:
Pad/shoe replacement, caliper/wheel cylinder overhaul, bleeding procedure
Electrical Component Diagnosis And Repair:
Testing and replacement of starters, alternators, sensors, relays
Bodywork And Cosmetics:
Minor body panel repair, trim replacement
Diagnostic Charts:
Flowcharts for identifying and resolving issues
Depth:
Comprehensive (covers everything from basic maintenance to full engine/transmission rebuilds)
Diagnostic Capability:
Advanced diagnostic procedures for mechanical and electrical systems
Specification Detail:
Detailed torque specifications, clearances, and measurement data
Oil Change:
Every 7,500-10,000 miles or 12 months (refer to manual for precise interval based on driving conditions).
Air Filter Replacement:
Every 15,000-20,000 miles or as needed based on inspection.
Spark Plug Replacement:
Every 30,000 miles (check manual for specific plug type and gap).
Coolant Flush:
Every 2 years or 30,000 miles.
Brake Fluid Flush:
Every 2 years.
Engine Oil:
API SG/SH or higher, SAE 10W-40 or 15W-40 (refer to manual for precise viscosity based on temperature).
Coolant:
50/50 mix of BMW-approved antifreeze (ethylene glycol based) and distilled water.
Brake Fluid:
DOT 3 or DOT 4.
Transmission Fluid Manual:
GL-4 Gear Oil, SAE 75W-90 or 80W-90.
Transmission Fluid Automatic:
Dexron II (or equivalent specification, check manual for exact type).
Rust Prone Areas:
Wheel arches, rocker panels, trunk floor, jacking points, sunroof surround.
Cooling System Failures:
Cracked radiator end tanks, failing water pump, thermostat housing leaks.
Fuel System Wear:
Degraded fuel lines, failing fuel pump, clogged injectors (due to age).
Electrical Gremlins:
Corroded connectors, aging wiring harness, failing relays, dashboard light issues.
Suspension Bushings:
Worn control arm bushings, trailing arm bushings, and subframe bushings leading to poor handling and noise.
Heater Core Leaks:
Common failure leading to coolant smell inside the cabin and foggy windows.