Market Segment:
Executive Sedan, Luxury Sports Sedan
Competitor Comparison:
Competed with Mercedes-Benz W123/W124, Audi 100, Volvo 240, Jaguar XJ Series
Driving Dynamics:
Renowned for its balanced chassis, rear-wheel drive, and driver-focused engineering
Build Quality:
Exemplary German engineering and build quality, designed for longevity
Powertrain Reliability:
M30 engine series is known for its robust construction and durability when properly maintained
Interior Comfort:
Comfortable and driver-oriented cabin with high-quality materials
Engine Mechanical:
Complete overhaul, component diagnostics, timing belt/chain replacement, cooling system, lubrication system
Fuel System:
Bosch L-Jetronic/Motronic injection system, fuel pump, injectors, fuel lines, tank
Ignition System:
Distributor, ignition coils, spark plugs, timing adjustments
Exhaust System:
Catalytic converter, mufflers, exhaust manifold, O2 sensors (if applicable)
Transmission Manual:
Clutch, gearbox, drive shafts, differential, fluid changes, rebuild procedures
Transmission Automatic:
Fluid changes, torque converter, electronic controls (if applicable), general maintenance
Brakes:
Hydraulic system, ABS (if equipped), brake discs, pads, calipers, master cylinder, lines, bleeding procedures
Suspension:
Front struts, rear shocks, control arms, bushings, anti-roll bars, steering linkage
Steering:
Power steering system, steering rack/box, tie rods, steering column
Electrical System:
Battery, alternator, starter, wiring diagrams, fuses, relays, lighting systems
Climate Control:
HVAC system, blower motor, A/C system, heater core, diagnostics
Body And Interior:
Body panel removal/installation, door mechanisms, interior trim, seats, glass replacement
Diagnostics And Troubleshooting:
Step-by-step diagnostic procedures, common fault codes, symptom-based troubleshooting
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, fluid level checks, tire rotations
Major Repairs:
Engine rebuilds, transmission overhauls, brake system repairs, suspension component replacement
Component Replacement:
Alternator, starter, water pump, fuel pump, radiator, clutch assembly
Wiring Diagrams:
Complete and detailed electrical schematics for all systems
Torque Specifications:
Precise torque values for all critical fasteners
Special Tool Identification:
Identification of BMW-specific tools required for certain procedures
Depth Of Information:
From basic DIY maintenance to advanced engine and transmission rebuilds
Diagnostic Capability:
Extensive diagnostic trees and component testing procedures
Rebuild Instructions:
Detailed step-by-step instructions for complete engine and gearbox overhauls
Transmission Type Standard:
4-Speed Manual
Transmission Type Optional:
3-Speed Automatic (ZF 3HP22)
Rear Axle Ratio:
Typically 3.25:1 (Manual) / 3.46:1 (Automatic for Eta models)
Manual Transmission Fluid:
BMW MTF LT-2 or equivalent (e.g., Pentosin, Red Line MTL)
Automatic Transmission Fluid:
Dexron III / Mercon compatible fluid
Oil Change Interval:
Typically every 5,000-7,500 miles or 6-12 months, depending on driving conditions.
Spark Plug Replacement:
Approximately every 20,000-30,000 miles, depending on spark plug type.
Coolant Flush:
Every 2-3 years or 30,000 miles.
Engine Oil Specification:
API SG or higher, SAE 15W-40 or 10W-40 (check owner's manual for specific climate recommendations)
Engine Oil Capacity:
Approximately 5.7 Liters (6.0 US Quarts) with filter change
Coolant Type:
Ethylene Glycol based antifreeze, typically BMW Blue or compatible.
Common Engine Wear:
Oil leaks from valve cover gasket and oil pan gasket, potential head gasket issues if overheated.
Common Fuel System Issues:
Clogged fuel injectors, failing fuel pump, degraded fuel lines.
Common Suspension Wear:
Worn control arm bushings, sagging front springs, leaking front struts.
Common Electrical Issues:
Fraying wiring harnesses, failed alternator voltage regulators, corroded grounds.
Common Cooling System Issues:
Leaking radiator, cracked coolant hoses, failing thermostat, older plastic coolant expansion tanks can become brittle.
