Product Name:
BMW 525i 1987 Best Service Repair Manual
Chassis Code:
E30 (for 525i model designation in this era, though primarily associated with the 3 Series, BMW used similar engine families. For a 5 Series of this era, it would typically be E28 chassis. This product likely refers to an engine variant within the 5 Series, possibly a 525e or 528e in some markets, or an engine swap context. Clarification needed if it's strictly a 5 Series E28 model. Assuming the product name implies E28 525i/e variant)
Engine Code Family:
M20 (likely for the 525i/e in this period)
Era Positioning:
The BMW 5 Series (E28 chassis for this period) represented BMW's mid-size luxury sedan offering, positioned as a sophisticated, driver-focused alternative to mainstream executive cars. The 525i variant offered a blend of performance and refinement.
Key Competitors:
Mercedes-Benz W124 E-Class, Audi 100/200, Jaguar XJ6, Volvo 700 Series.
Driving Dynamics:
Renowned for its balanced chassis, responsive steering, and rear-wheel-drive dynamics, offering a superior driving experience for its class.
Powertrain Refinement:
The M20 inline-six engine, while not the most powerful in BMW's history, offered smooth operation and respectable torque delivery, coupled with efficient Bosch fuel injection.
Powertrain:
Engine (M20 variants: M20B25), Fuel System (Bosch L-Jetronic/Motronic), Ignition System, Exhaust System, Cooling System, Lubrication System
Transmission:
Manual Transmission (Getrag 260), Automatic Transmission (ZF 4HP22), Drivetrain (Rear Wheel Drive, Driveshaft, Differential)
Chassis:
Suspension (Front McPherson Strut, Rear Semi-Trailing Arm), Steering System (Power Steering), Brakes (Front Discs, Rear Discs, ABS), Wheels and Tires
Electrical:
Wiring Diagrams, Lighting System, Charging System (Alternator, Battery), Starting System, Instrumentation, ECU (Engine Control Unit), Fuses and Relays
Body:
Exterior Body Panels, Interior Trim, Doors, Windows, Seats, Climate Control System (HVAC), Body Sealing
Routine Maintenance:
Oil Changes, Filter Replacements, Spark Plug Service, Fluid Checks and Replacements (Coolant, Brake Fluid, Power Steering Fluid, Transmission Fluid)
Repair Procedures:
Engine Overhaul, Cylinder Head Service, Fuel Injector Replacement, Alternator Rebuild, Brake Caliper Service, Suspension Component Replacement, Transmission Overhaul
Diagnostics:
Troubleshooting Charts, Symptom-Based Diagnostics, Fault Code Interpretation (if applicable to Bosch Motronic), Electrical System Testing
Specifications:
Torque Values, Clearances, Timing Specifications, Fluid Capacities, Electrical Component Resistances
Depth Level:
Comprehensive Factory Level (covers everything from basic maintenance to complete engine and transmission rebuilds, including detailed electrical schematics and diagnostic procedures)
Digital Format:
PDF (Portable Document Format)
PDF Quality:
High-resolution scans of original factory documents, ensuring clarity of text and diagrams
Binding For Download:
N/A (Digital Download)
Paper Type For Print:
Suitable for standard office printing paper (A4 or Letter)
Text Search:
Likely text-searchable if OCR (Optical Character Recognition) was applied during PDF creation, allowing quick finding of specific terms.
Engine Type:
Inline 6-Cylinder, SOHC (Single Overhead Camshaft)
Displacement:
2494 cc (2.5 Liters)
Horsepower:
Approx. 171 hp @ 5800 rpm (for M20B25, variations may exist)
Torque:
Approx. 220 Nm (162 lb-ft) @ 4300 rpm (for M20B25, variations may exist)
Fuel Delivery:
Bosch Motronic Fuel Injection (likely Motronic 1.3)
Fuel Type:
Unleaded Gasoline (Octane rating as per BMW specification for the era, typically 91 RON or higher)
Coolant Type:
BMW Blue Antifreeze/Coolant (or equivalent silicate-free, ethylene glycol-based)
Oil Type:
API SG, ACEA A2/B2 or higher, viscosity 15W-40 or 10W-40 (refer to manual for exact BMW approval)
Oil Capacity:
Approx. 4.25 Liters (4.5 US Quarts) with filter change
Spark Plugs:
Bosch W8AC or equivalent (refer to manual for precise part number)
Transmission Type:
5-Speed Manual Transmission (Getrag 260)
Transmission Type:
4-Speed Automatic Transmission (ZF 4HP22)
Manual Fluid Type:
API GL-4 SAE 75W-90 or SAE 80W-90 gear oil (refer to manual for specific BMW approval)
Automatic Fluid Type:
Dexron II (or equivalent specified ATF)
Length:
Approx. 4620 mm (181.9 in)
Width:
Approx. 1700 mm (66.9 in)
Height:
Approx. 1415 mm (55.7 in)
Wheelbase:
Approx. 2700 mm (106.3 in)
Curb Weight:
Approx. 1400-1500 kg (3086-3307 lbs) depending on transmission and options
Gross Vehicle Weight Rating:
Refer to vehicle's VIN plate or manual
Crash Test Data:
As a 1987 vehicle, formal crash test ratings (like NHTSA or IIHS) were less standardized and comprehensive than today. However, the E28 chassis was known for its robust safety cell construction.
ABS:
Anti-lock Braking System (ABS) was available as an option on most models, including the 525i.
Traction Control:
Traction control was not a standard or common option for this model year.
Seatbelts:
Three-point inertia-reel seatbelts for front and rear occupants. Pretensioners may have been optional or standard depending on market.
Airbags:
Driver's airbag was typically optional or introduced late in the E28 lifecycle for certain markets. Passenger airbags were not available.
Body Structure:
Reinforced passenger compartment, crumple zones, and impact-absorbing steering column.
Audio System:
Typically an AM/FM radio with cassette player, often from BMW's own sound system division or premium aftermarket brands like Nakamichi or Blaupunkt.
Speaker Configuration:
Standard configuration usually includes door speakers and rear deck speakers. Optional upgraded systems might include more speakers.
Cruise Control:
Electronic cruise control was a common option.
Trip Computer:
Optional trip computer offering basic fuel consumption and range information.
Connectivity Features:
No modern connectivity features like Bluetooth or USB; primary connection was through the audio system's analog inputs.
Oil Change Interval:
Every 15,000 km (9,300 miles) or 12 months, whichever comes first (check manual for exact recommendation based on oil type and driving conditions).
Air Filter Replacement:
Every 30,000 km (18,600 miles) or as needed based on inspection.
Spark Plug Replacement:
Every 30,000 km (18,600 miles) for standard plugs, longer for platinum/iridium if available.
Coolant Replacement:
Every 2-3 years or as per manual specification (often with a BMW-specific coolant).
Brake Fluid Replacement:
Every 2 years to prevent moisture absorption and corrosion.
Power Steering Fluid:
BMW Power Steering Fluid (or Pentosin CHF 11S/202 depending on specific system, consult manual)
Differential Fluid:
API GL-5 SAE 75W-90 or 80W-90 gear oil (check manual for LSD if equipped)
Cooling System Leaks:
Plastic coolant expansion tank, hoses, and water pump can degrade over time leading to leaks.
Engine Idle Problems:
Vacuum leaks from intake manifold gaskets, idle control valve issues, or distributor O-rings can cause rough idle.
Electrical Gremlins:
Degradation of wiring insulation, corrosion in connectors, and failing grounds can lead to intermittent electrical issues.
Suspension Wear:
Worn control arm bushings, ball joints, and rear trailing arm bushings are common due to age and mileage.
Rust Prone Areas:
Wheel wells, rocker panels, strut towers, and rear quarter panels are susceptible to rust.
Bmw Philosophy:
BMW's long-standing reputation for building 'The Ultimate Driving Machine' through precise engineering, powerful engines, and superior handling.
E28 Generation:
The E28 was the second generation of the BMW 5 Series, produced from 1981 to 1988. It succeeded the E12 and was replaced by the E34. The E28 featured a more angular and aerodynamic design compared to its predecessor, with significant chassis and powertrain updates.
525I Variant:
The 525i model, powered by the 2.5-liter M20 engine, offered a compelling balance of performance and efficiency within the E28 lineup. In some markets, a 525e with a 2.7-liter engine focused on economy was also prominent.
Production Years:
E28 production: 1981-1988. Specific 525i variants produced throughout this period.
Design Awards:
While specific awards for the 1987 525i are not widely documented, the E28 generation itself was praised for its timeless design and engineering excellence, contributing to BMW's reputation.
Automotive Press Reviews:
Consistently lauded by automotive journalists of the era for its driving dynamics, build quality, and refinement.
European Design Awards:
BMW 5 Series models have historically received various design and engineering accolades in Europe.
