Engine:
Detailed overhaul, diagnosis, component testing (e.g., M30B30 3.0L Inline-6)
Fuel System:
Fuel injection (Bosch Motronic), fuel pump, injectors, pressure regulator
Ignition System:
Ignition timing, coil packs, spark plugs, distributor (if applicable)
Transmission:
Manual (Getrag 260) and Automatic (ZF 4HP-22 EH) transmission repair, fluid changes, diagnostics
Drivetrain:
Driveshaft, differential, axles, wheel bearings
Suspension:
Front struts, rear multi-link, control arms, bushings, springs, dampers, alignment
Steering:
Power steering system, steering rack, tie rods, steering column
Brakes:
Front and rear disc brakes, ABS (Anti-lock Braking System) diagnosis and repair, brake fluid, master cylinder, calipers
Electrical System:
Wiring diagrams, battery, alternator, starter, fuses, relays, lighting, instrumentation
Climate Control:
HVAC system, A/C compressor, heater core, blower motor, controls
Body And Chassis:
Body panels, doors, glass, interior trim, chassis component repair
Diagnostic Trouble Codes:
ECU (Electronic Control Unit) codes and troubleshooting procedures
Maintenance:
Oil changes, filter replacements, spark plug replacement, fluid checks, belt inspection/replacement
Repair:
Component replacement (e.g., water pump, alternator, starter, brake pads/rotors)
Rebuild:
Engine rebuild, transmission overhaul
Troubleshooting:
Step-by-step diagnostic guides for common and uncommon issues
Adjustments:
Valve adjustments, idle speed settings, parking brake adjustment
Diagnostics:
Electrical system diagnostics, engine performance analysis
Wiring Diagrams:
Detailed, system-specific wiring diagrams for all electrical components.
Specifications:
Torque specifications for all critical fasteners.
Diagnostic Charts:
Flowcharts and charts for troubleshooting electrical and mechanical faults.
Depth:
Comprehensive: from basic maintenance to full engine and transmission rebuilds, including detailed diagnostic procedures and electrical schematics.
Engine Type:
Naturally Aspirated Inline-6 (M30B30)
Displacement:
2,986 cc (3.0 Liters)
Bore X Stroke:
89.0 mm x 80.0 mm
Horsepower:
189 hp @ 5,700 rpm (approx.)
Torque:
214 lb-ft @ 4,500 rpm (approx.)
Fuel Delivery:
Bosch Motronic M3.1 Fuel Injection
Fuel Type:
Unleaded Gasoline (Premium)
Coolant Capacity:
Approx. 8.5 Liters (1.8 Imp. Gallons)
Oil Capacity:
Approx. 6.5 Liters (5.7 Imp. Quarts) with filter
Recommended Oil:
SAE 15W-40 or 10W-40 API SG
Type:
Getrag 260 5-Speed Manual
Type:
ZF 4HP-22 EH 4-Speed Automatic
Automatic Features:
Electronic control, sport/economy modes (depending on specific E34 variant).
Manual Transmission Fluid Capacity:
Approx. 1.7 Liters (1.5 Imp. Quarts)
Automatic Transmission Fluid Capacity:
Approx. 8.0 Liters (7.0 Imp. Quarts) for complete fill
Manual Transmission Fluid Type:
GL-4 Gear Oil (e.g., Castrol TAF-X or equivalent)
Automatic Transmission Fluid Type:
Dexron III (or ATF SP-III equivalent)
Federal Crash Test Rating:
NHTSA ratings from that era vary, typically 4-star for frontal impact.
ABS:
Standard Bosch ABS II (2-channel) system.
Airbags:
Driver-side airbag standard.
Seatbelts:
Front seatbelt pretensioners.
Body Structure:
Reinforced safety cell, crumple zones.
Oil Change Interval:
Every 7,500 - 10,000 miles or 12 months, whichever comes first (based on driving conditions).
Air Filter Replacement:
Every 15,000 - 30,000 miles.
Spark Plug Replacement:
Every 30,000 - 60,000 miles (depending on plug type, often copper or platinum).
Coolant Flush:
Every 2 years or 30,000 miles.
Brake Fluid Type:
DOT 3 or DOT 4
Power Steering Fluid Type:
ATF Dexron II or III
Common Issue 1:
Cooling system leaks (radiator, hoses, water pump).
Common Issue 2:
Head gasket leaks (especially on higher mileage M30 engines).
Common Issue 3:
Cracked plastic intake manifold components (some early M30s).
Common Issue 4:
Sagging headliner and worn interior plastics.
Common Issue 5:
ABS sensor failures and related warning lights.
Oil Filter Part Number:
Mann-Filter W940/11, Mahle OX101/1 (or equivalent BMW P/N 11 42 1 730 230)
Air Filter Part Number:
Mann-Filter C35147/1, Mahle LX44 (or equivalent BMW P/N 13 72 1 730 944)
Spark Plug Part Number:
NGK BKR6EK (or equivalent BMW P/N 12 12 9 061 900)