Target Audience:
Affluent buyers seeking a blend of performance, luxury, and durability.
Key Competitors:
Mercedes-Benz W123/W124 E-Class, Audi 100/200, Jaguar XJ-S, Volvo 240/700 Series.
Driving Dynamics:
Renowned for its sophisticated suspension, precise steering, and balanced handling, characteristic of BMW's 'Ultimate Driving Machine' ethos.
Powertrain Refinement:
The M30 inline-six engine provided smooth power delivery and robust performance.
Build Quality:
Known for exceptional build quality and longevity, often considered a very durable vehicle.
Engine Mechanical:
Engine assembly, disassembly, overhaul, cooling system, lubrication system, fuel system (including Bosch L-Jetronic/Motronic injection), exhaust system, ignition system.
Engine Electrical:
Ignition timing, spark plug diagnosis, engine control unit (ECU) functions, sensor testing, starter motor, alternator, battery system.
Transmission:
Manual and automatic transmission repair, clutch service, gear selection mechanisms, torque converter, transmission fluid service.
Drivetrain:
Driveshafts, differential, rear axle assembly, wheel bearings.
Suspension:
Front and rear suspension components, shock absorbers, struts, springs, bushings, alignment specifications.
Steering:
Steering gearbox, power steering system, tie rods, steering linkage, steering column.
Brakes:
Brake system diagnosis, front and rear brake component replacement (discs, pads, calipers), ABS (if equipped), brake hydraulics, parking brake.
Electrical System:
Complete wiring diagrams, lighting systems (headlights, taillights, interior), power windows, central locking, instrumentation, fuse box layout, relays.
Climate Control:
HVAC system operation, heater core, A/C system servicing (refrigerant, compressor), blower motor, climate controls.
Body And Chassis:
Body panel removal and installation, door mechanisms, interior trim, exterior trim, glass replacement, chassis components.
Maintenance Tasks:
Oil changes, filter replacements, spark plug service, belt inspections and replacement, coolant flushes, brake fluid changes, tire rotations.
Diagnostic Procedures:
Troubleshooting guides for common drivability issues, electrical faults, and mechanical problems. Diagnostic trouble codes (DTCs) if applicable to the era.
Repair Procedures:
Detailed, step-by-step instructions for component removal, repair, and reinstallation for all major vehicle systems.
Component Overhaul:
Complete engine rebuild procedures, transmission overhaul guides, differential rebuilds.
Electrical Troubleshooting:
Step-by-step troubleshooting of electrical circuits using wiring diagrams, testing components with multimeters, diagnosing sensor failures.
Depth:
Highly detailed, suitable for professional mechanics and advanced DIY enthusiasts. Covers everything from basic maintenance to full engine and transmission rebuilds.
Detail Level:
Includes torque specifications, tolerances, diagnostic charts, and detailed illustrations.
Oil Change Interval:
Typically every 7,500 - 10,000 miles (12,000 - 16,000 km) or annually, whichever comes first, depending on driving conditions and oil type used.
Coolant Change:
Every 2-3 years or as recommended by BMW (often 30,000 miles/50,000 km).
Transmission Fluid Auto:
BMW initially stated 'lifetime fill' for automatics, but regular fluid and filter changes (e.g., every 60,000 miles) are highly recommended for longevity.
Transmission Fluid Manual:
Check level periodically, replace every 60,000-100,000 miles (100,000-160,000 km).
Engine Oil Viscosity:
SAE 10W-40 or 15W-40 is common, with 5W-30/5W-40 recommended for colder climates or modern synthetic oils. Consult manual for exact specs.
Coolant Type:
Ethylene glycol based coolant (e.g., BMW blue or green coolant).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Transmission Fluid Auto:
Dexron II or equivalent ATF (Automatic Transmission Fluid).
Transmission Fluid Manual:
GL-4 Hypoid gear oil (e.g., SAE 75W-90 or 80W-90).
Common Problems:
Cooling system component failures (radiator, water pump, hoses), fuel distributor and injector issues, fuel pump wear, vacuum leaks, electrical connector corrosion, headliner sagging, seized sunroof mechanisms.
Common Issues Continued:
Worn suspension bushings, heater control valve leaks, front and rear shock absorber degradation, exhaust system rust, idle control valve issues.
Bmw Philosophy:
BMW's reputation for engineering excellence, driver-focused dynamics, and premium build quality.
E28 Introduction:
The E28 was the second generation of the 5 Series, introduced in 1981, succeeding the E12. It featured more modern styling and improved aerodynamics.
E28 Facelift:
A significant facelift occurred in 1985, introducing updated bumpers (often referred to as 'air dams' or 'big plastic bumpers'), improved aerodynamics, and revised interior appointments.
Production Years:
1981-1988
Manufacturing Locations:
Primarily Germany (Dingolfing).
