Segment:
Executive Sedan, Luxury Mid-size Sedan
Target Audience:
Discerning drivers seeking performance, luxury, and build quality.
Key Competitors:
Mercedes-Benz E-Class (W124), Audi 100/200, Jaguar XJ, Lexus LS (later in the period).
Driving Dynamics:
Renowned for BMW's characteristic sporty handling, precise steering, and balanced chassis.
Powertrain Refinement:
Smooth and potent M30 inline-six engine, offering a blend of power and refinement.
Build Quality:
Exceptional German engineering and robust construction, contributing to longevity.
Design Language:
E34 generation's classic, understated, and elegant design, a departure from earlier, more angular BMWs.
Engine Mechanical:
Complete engine overhaul, including cylinder head, block, pistons, crankshaft, camshafts, valve train, timing components, lubrication system, cooling system.
Fuel System:
Fuel injection system (Bosch Motronic), fuel pump, injectors, fuel pressure regulator, fuel filter, evaporative emission control (EVAP).
Ignition System:
Ignition control module, distributor (if applicable to specific variant), spark plugs, coils, wiring.
Transmission Manual:
Manual transmission (Getrag 260/5, commonly used) service, clutch operation, gearbox overhaul, shift linkage.
Transmission Automatic:
Automatic transmission (ZF 4HP22 EH) service, hydraulic control, torque converter, valve body, cooler lines.
Drivetrain And Axles:
Driveshaft, universal joints, differential, rear axle assembly, wheel bearings.
Suspension And Steering:
Front and rear suspension components (struts, control arms, bushings, sway bars), power steering system, steering column, tie rods.
Brakes:
Hydraulic brake system, ABS (Anti-lock Braking System), brake calipers, rotors, pads, lines, master cylinder, brake booster.
Electrical System:
Battery, alternator, starter motor, wiring diagrams, fuses, relays, lighting system, horn, wipers, power windows, power locks.
Climate Control HVAC:
Air conditioning system, heater core, blower motor, climate control unit, refrigerant lines.
Body And Chassis:
Body panel removal and installation, door mechanisms, interior trim, bumpers, glass, chassis lubrication points.
Diagnostic Troubleshooting:
Systematic troubleshooting guides, fault codes (where applicable for the era), diagnostic procedures.
Preventative Maintenance:
Oil changes, filter replacements, fluid checks and flushes, spark plug replacement, belt inspection and replacement.
Routine Repairs:
Component replacement (alternator, starter, water pump, brake pads, suspension parts), bulb replacement, wiper blade replacement.
Major Overhauls:
Engine rebuild procedures, transmission overhaul, differential rebuild, cylinder head replacement.
Diagnostic And Testing:
Compression testing, leak-down testing, electrical system testing, fuel pressure testing, ignition timing verification.
Wheel Alignment And Balancing:
Alignment specifications, wheel balancing procedures.
Body And Trim Repair:
Door panel removal, seat removal, minor body panel adjustment.
Depth:
Comprehensive, suitable for professional technicians and advanced DIY enthusiasts. Includes detailed diagnostic trees, torque specifications, and specialized tool requirements.
Oil Change Interval:
Typically every 7,500 to 10,000 miles or 12 months, whichever comes first. Check manual for specific recommendations based on driving conditions.
Transmission Fluid Change:
Manual: Inspect for leaks, change as needed or at higher mileage (e.g., 50,000-100,000 miles). Automatic: Typically every 30,000-50,000 miles, or as per manual, especially for extended life of the ZF unit.
Coolant Flush:
Every 2-3 years or 30,000-50,000 miles.
Engine Oil Type:
API SG or higher, SAE 0W-30, 5W-30, 5W-40, or 10W-40 (depending on climate and specific engine wear). Check manual for exact BMW specification (e.g., BMW High Performance Synthetic).
Engine Oil Capacity:
Approx. 6.5 quarts (6.2 liters) with filter change.
Transmission Fluid Manual:
GL-4 or GL-5 Gear Oil, SAE 75W-90 or 80W-90.
Transmission Fluid Automatic:
ZF LifeguardFluid 5 (or equivalent Dexron III type fluid for earlier versions of this transmission, but specialized fluid is recommended).
Coolant Type:
Ethylene Glycol based antifreeze. BMW recommends specific coolant, often blue or green (G48). Mix 50/50 with distilled water.
Power Steering Fluid:
CHF 11S or Dexron III (check specific system type; some E34s used hydraulic fluid).
Common Wear Items:
Cooling system components (radiator, hoses, water pump), fuel pump, fuel injectors, control arm bushings, strut mounts, oil pan gasket leaks, valve cover gasket leaks.
Electrical Quirks:
Degradation of wiring insulation, especially in the engine bay and near heat sources. Issues with window regulators, door lock actuators, and ABS sensors.
Engine Specific Points:
M30 engines are generally robust but can suffer from oil consumption if not properly maintained. Timing chain tensioner and guides are critical maintenance items.
