Market Position:
Luxury Sport Sedan
Competitive Analysis:
Competed with models like Mercedes-Benz W124 E-Class, Audi 100/200, and Jaguar XJ in the mid-size luxury segment, known for its superior driving dynamics and engineering.
Key Features:
Rear-wheel drive, balanced chassis, refined inline-six engines, driver-focused interior, build quality.
Systems Covered:
Engine Mechanical, Engine Management (DME), Fuel System, Ignition System, Cooling System, Exhaust System, Clutch, Manual Transmission, Automatic Transmission, Drive Shaft, Differential, Suspension (Front & Rear), Steering System, Brakes (Front & Rear), Electrical System (Wiring Diagrams, Components), Climate Control, Body & Chassis, Interior Trim, Diagnostic Procedures, Troubleshooting
Procedures Included:
Routine Maintenance, Scheduled Servicing, Major Overhauls, Component Replacement, Diagnostic Troubleshooting, Electrical System Diagnosis, Emission Control System Servicing, Drivetrain Repair, Suspension and Steering Alignment, Brake System Overhaul, Body Panel Repair, Interior Component Repair
Technical Depth:
Comprehensive (from basic fluid changes to complete engine and transmission rebuilds, detailed electrical schematics and diagnostic procedures)
Engine Type:
Inline 6-Cylinder, SOHC
Displacement:
2.7 Liters (2693 cc)
Bore X Stroke:
84.0 mm x 81.0 mm
Horsepower Ps:
171 PS @ 5,800 rpm (Approx.)
Torque Nm:
230 Nm @ 4,500 rpm (Approx.)
Fuel System Type:
Bosch L-Jetronic Fuel Injection
Fuel Type:
Unleaded Gasoline (Premium)
Ignition System:
Electronic Ignition (BMW Ignition Module)
Cooling System:
Water-Cooled
Oil Type Recommendation:
API SG/CD, SAE 15W-40 or 20W-50 (Check manual for specific climate variations)
Standard Transmission:
Getrag 260 5-Speed Manual
Optional Transmission:
ZF 4HP22 4-Speed Automatic
Manual Transmission Fluid Spec:
GL-4 gear oil (e.g., Pentosin MTF 2 or equivalent, 75W-90)
Automatic Transmission Fluid Spec:
ATF Dexron II/III (e.g., Pentosin ATF 11 or equivalent)
Safety Ratings:
Era-specific safety standards; strong chassis and structural integrity typical of BMWs.
Passive Safety Features:
Reinforced passenger cell, energy-absorbing steering column, side-impact door beams, padded interior surfaces.
Active Safety Features:
Anti-lock Braking System (ABS) often standard or optional on higher trims/later models, excellent brake feel and performance.
Infotainment System:
Basic analog gauges, optional cassette player with radio, analog climate controls.
Driver Assistance Features:
None (Era-appropriate, focus on mechanical feedback and driver control).
Connectivity Features:
None (Era-appropriate).
Oil Change Interval Km Miles:
Every 7,500 - 15,000 km (4,500 - 9,000 miles) or annually, depending on driving conditions (refer to manual for exact intervals).
Spark Plug Replacement Interval:
Check/replace per manual, typically around 30,000-50,000 km (18,000-30,000 miles).
Coolant Flush Interval:
Every 2-3 years or 40,000-60,000 km (25,000-37,000 miles).
Timing Belt Replacement Interval:
M20 engines use a timing belt. Check manual for interval; typically around 80,000-100,000 km (50,000-60,000 miles) or 5 years.
Coolant Type:
BMW Blue Antifreeze (or equivalent ethylene glycol based coolant with corrosion inhibitors), mixed 50/50 with distilled water.
Brake Fluid Type:
DOT 3 or DOT 4 (Check manual for specific recommendation).
Engine Oil Capacity Liters:
Approx. 4.5 Liters (with filter).
Common Issues:
Cooling system leaks (hoses, water pump, radiator), fuel distributor issues (M20 engines), idle control valve problems, window regulator failures, rust (wheel arches, sills, sunroof panel), instrument cluster pixel failure, rear subframe mounting points, seized brake calipers.
Preventative Maintenance Focus:
Regular inspection and replacement of cooling system components, regular fluid changes, rust prevention and treatment.
Brand Heritage:
BMW's legacy in building driver-focused, high-performance luxury vehicles with a focus on engineering and driving pleasure.
Model Evolution:
The E28 was the second generation of the BMW 5 Series, succeeding the E12 and preceding the E34. It refined the E12's design and engineering, introducing more advanced features and improved aerodynamics. The 525i was a significant mid-range model, bridging the gap between the 520i/524td and the higher-performance M5. It was produced from 1981 to 1988, with the 1986 model year representing a mature iteration of the E28 platform.
Production Period:
1981-1988 (E28 platform)
Production Location:
Dingolfing, Germany
