Segment:
Executive/Luxury Mid-size Sedan
Target Audience:
Performance-oriented luxury car buyers valuing driving dynamics and build quality
Key Competitors:
Mercedes-Benz W124 E-Class, Audi V8 Quattro, Jaguar XJ
Engineering:
Renowned BMW driving dynamics, balanced chassis, high-quality interior materials
Innovation:
Early adoption of advanced engine management and chassis technologies
Engine Mechanical:
Complete overhaul, timing, valve adjustments, lubrication, cooling
Engine Management:
Fuel injection (Bosch Motronic), ignition system, sensors, actuators, ECU diagnostics
Transmission Manual:
Clutch, gearbox overhaul, shift mechanism, maintenance
Transmission Automatic:
Torque converter, gearbox overhaul, shift control, maintenance, fluid service
Brakes:
Hydraulic system, ABS (if equipped), brake pads, rotors, lines, calipers, parking brake
Suspension:
Front struts, rear multi-link, shock absorbers, springs, bushings, alignment
Steering:
Power steering system, steering rack, column, tie rods, universal joints
Electrical System:
Battery, alternator, starter, wiring diagrams, lighting, fuses, relays, diagnostic connectors
Body And Chassis:
Body panels, doors, windows, sunroof, interior trim, chassis components
Heating Ventilation Air Conditioning:
HVAC system components, blower motor, climate control, refrigerant service
Routine Maintenance:
Oil changes, filter replacements, fluid checks, spark plug replacement, belt inspection
Diagnostic Troubleshooting:
Step-by-step diagnostic procedures for common and uncommon issues
Component Replacement:
Detailed instructions for replacing major and minor components
Rebuilding Procedures:
Comprehensive guides for rebuilding engines, transmissions, and other major assemblies
Electrical Troubleshooting:
Wiring diagrams analysis, fault finding for electrical systems
Specifications And Tolerances:
Torque specifications, clearances, and alignment data
Depth:
Comprehensive, covering all aspects from basic maintenance to full engine and transmission rebuilds. Includes advanced diagnostics and repair procedures.
Engine Code:
M30B34 (often the basis for the 525i variant in some markets or related models)
Engine Type:
Inline 6-cylinder, SOHC
Displacement:
2.5 Liters (2494 cc)
Bore X Stroke:
84.0 mm x 75.0 mm
Horsepower:
Approx. 168-170 hp @ 5,300-6,000 rpm (market dependent)
Torque:
Approx. 226-230 Nm (167-170 lb-ft) @ 3,250-4,000 rpm (market dependent)
Injection:
Bosch Motronic (likely Motronic 1.3)
Fuel Type:
Unleaded gasoline (RON 95 or higher recommended)
Oil Change:
Every 10,000-15,000 km (6,000-9,000 miles) or annually. Consult manual for specific intervals.
Spark Plugs:
Every 30,000-50,000 km (18,000-30,000 miles), depending on plug type.
Coolant Flush:
Every 2-3 years or 40,000-60,000 km (25,000-37,000 miles).
Engine Oil:
API SG/SH, ACEA A2/A3, SAE 5W-30 or 5W-40 synthetic recommended for optimal performance and protection. Consult manual for specific viscosity.
Coolant:
BMW Blue (G48 ethylene glycol-based) or equivalent mixed 50/50 with distilled water.
Automatic Transmission Fluid:
ZF TE-ML 04D or DEXRON III (check manual for exact specification)
Manual Transmission Fluid:
GL-4 SAE 75W-90 or 90
Power Steering Fluid:
Pentosin CHF 11S or equivalent ATF Dexron III
Coolingsystem:
Plastic coolant expansion tanks can become brittle and crack; water pump seals can fail.
Engine Management:
MAF sensor issues, idle control valve problems, coil pack failures on later models (though less common on 87 525i).
Suspension:
Wear in control arm bushings, rear trailing arm bushings, and front sway bar links leading to steering looseness and clunks.
Electrical:
Corrosion in electrical connectors, fuel pump relay failures, HVAC blower resistor failure.
Body:
Rust in common areas like rocker panels, wheel wells, and rear quarters. Headliner sagging.
Heritage:
BMW's reputation for building sporty, driver-focused luxury sedans with advanced engineering.
Generation:
E34 generation, succeeding the E28 5 Series.
Design Philosophy:
Characterized by a more angular, aerodynamic design compared to its predecessor, with improved interior space and refinement.
Production Years:
1987-1996 (E34 generation)
Manufacturing Locations:
Germany (primarily Dingolfing)
