Target Audience:
Enthusiasts, DIY mechanics, restoration specialists
Competitors 1984:
Mercedes-Benz W123, Audi 5000, Volvo 740
Brand Philosophy:
Driving dynamics, build quality, technological innovation
Model Strengths:
Comfortable ride, capable handling, durable M30 engine
Engine:
Detailed diagnostics, repair, overhaul, tuning of M30B25 engine
Fuel System:
Bosch L-Jetronic fuel injection system, fuel pump, injectors, lines
Ignition System:
Electronic ignition timing, coil, distributor, spark plugs
Transmission:
Manual and Automatic transmission service, repair, clutch, driveshafts
Cooling System:
Radiator, fan, water pump, thermostat, hoses, coolant types
Exhaust System:
Catalytic converter (if applicable for market), muffler, pipes, gaskets
Brake System:
Front and rear disc brakes, ABS (if equipped), brake fluid, lines, calipers, master cylinder
Suspension System:
Front MacPherson struts, rear semi-trailing arms, shock absorbers, springs, bushings
Steering System:
Power steering system, steering rack, linkages, fluid
Electrical System:
Wiring diagrams, fuses, relays, battery, alternator, starter motor, lighting
Body And Chassis:
Body panel repair, rust prevention, structural integrity, alignment
HVAC System:
Heating, ventilation, and air conditioning system service and repair
Interior Appointments:
Seat removal, dashboard, door panels, trim repair
Maintenance:
Oil changes, filter replacements, tune-ups, fluid checks, belt inspections
Troubleshooting:
Diagnostic procedures for common and uncommon issues, fault finding
Repair:
Step-by-step repair instructions for all major vehicle systems
Rebuilding:
Engine and transmission rebuilding procedures
Refurbishment:
Procedures for bringing worn components back to original specifications
Restoration:
Guidance for period-correct restoration of the vehicle
Diagnostics:
Comprehensive diagnostic flowcharts and fault code interpretation (if applicable)
Depth:
Advanced (Covers everything from basic maintenance to complete engine and transmission rebuilds)
Engine Type:
Inline 6-cylinder, SOHC
Displacement:
2693 cc (2.7 Liters)
Bore X Stroke:
89.0 mm x 73.6 mm
Compression Ratio:
8.3:1 (Typical)
Horsepower:
150 PS (148 bhp; 110 kW) @ 5500 rpm (Approximate DIN)
Torque:
235 Nm (173 lb-ft) @ 3500 rpm (Approximate DIN)
Top Speed:
205 km/h (127 mph) (Approximate)
0 To 100 Km H:
9.5 seconds (Approximate)
Fuel Delivery:
Bosch LE-Jetronic Electronic Fuel Injection
Fuel Type:
Unleaded Petrol (Premium)
Oil Change Interval:
Typically every 5,000-7,500 miles or 6-12 months, depending on driving conditions.
Spark Plug Replacement:
Every 30,000 miles (or as per manual for specific plug type)
Timing Belt Chain Replacement:
M30 engine uses a timing chain, designed for the life of the engine, but tensioner and guides may require periodic inspection/replacement.
Engine Oil:
API SG/SH rated, SAE 10W-40 or 15W-40 recommended for general use (check manual for precise spec)
Coolant:
Ethylene glycol-based coolant, 50/50 mix with distilled water
Brake Fluid:
DOT 3 or DOT 4
Transmission Fluid Manual:
GL-4 gear oil, SAE 75W-90 or 80W-90
Transmission Fluid Automatic:
Dexron III (or equivalent specified by ZF)
Power Steering Fluid:
ATF Dexron II or III
Common Problems Engine:
Head gasket leaks, valve stem seals, worn timing chain guides, fuel injector issues
Common Problems Suspension:
Worn control arm bushings, aging shock absorbers, trailing arm bushings
Common Problems Electrical:
Aging wiring looms, failing fuel pump relays, alternator issues
Common Problems Body:
Rust in wheel arches, rocker panels, battery tray area
Bmw History:
Renowned for engineering, performance, and luxury sedans since its inception.
E28 Introduction:
Introduced in 1981 as the successor to the E12, the E28 was BMW's second generation of the 5 Series. Known for its sharper styling and improved aerodynamics.
E28 525I Positioning:
The 525i represented a mid-range offering in the E28 lineup, balancing performance and refinement.
Production Years:
E28 production: 1981-1988. The 525i model was produced during this period.
Manufacturing Locations:
Primarily Dingolfing, Germany.
