Positioning:
Essential diagnostic and repair resource for owners and mechanics of the BMW 5 Series E28 528e, replicating dealer-level information.
Advantage:
Provides complete electrical troubleshooting capabilities, often a complex area for vintage vehicles, offering significant cost savings over dealer service.
Feature List:
Detailed sub-steps, notes, cautions, warnings, numbered instructions, bold figure numbers, hundreds of illustrations/photos, enlarged insets, numbered table of contents, combined troubleshooting and wiring diagrams.
Electrical Systems:
Comprehensive coverage including ignition, starting, charging, lighting, instrumentation, power accessories, climate control, and engine management electronics.
Wiring Diagrams:
Detailed, model-specific wiring diagrams with component identification and wire routing.
Troubleshooting:
Systematic diagnostic procedures for electrical faults, symptom-based troubleshooting guides.
Repair:
Step-by-step repair instructions for electrical components and systems.
Maintenance:
Electrical system checks and preventative maintenance.
Wire Harness Repair:
Guidelines for repairing damaged wire harnesses and connectors.
Depth:
Detailed step-by-step instructions with hundreds of photos, illustrations, and diagrams, suitable for both DIY enthusiasts and professional mechanics.
Digital Quality:
High-resolution scan, intact and complete, no missing/corrupt pages.
Print Readability:
Designed for clarity when printed, facilitating workshop use.
Binding:
Digital (PDF) - no physical binding
Paper Type Simulation:
Simulates high-quality paper manual for ease of use and durability when printed.
Engine Code Designation:
M20 (specifically M20B27)
Engine Type:
Inline 6-cylinder, SOHC
Displacement:
2.7 Liters (2693 cc)
Bore X Stroke:
84.0 mm x 81.0 mm
Compression Ratio:
8.0:1 or 8.5:1 (depending on specific market/variant)
Horsepower Estimated:
121-125 hp @ 4800-5000 rpm (varies slightly by market and emissions regulations)
Torque Estimated:
170-174 lb-ft @ 3000-3250 rpm (varies slightly by market)
Fuel Delivery:
Bosch L-Jetronic or Motronic fuel injection (specific system varies by model year and market)
Fuel Type:
Unleaded Gasoline
Transmission Type:
4-speed Automatic (ZF 4HP22) often standard, particularly on the 528e for economy focus
Transmission Type:
5-speed Manual (Getrag 260)
Ecotronic System:
Some 528e models featured the 'Ecotronic' system, which integrated transmission and engine management for enhanced fuel economy, often with a 3-speed automatic and overdrive functionality, or a specific ECU tune for manual transmissions.
Crash Testing:
While specific NHTSA/IIHS ratings for the 1982-1988 E28 are not readily available in modern formats, BMW's engineering during this era emphasized passive safety with a strong unibody structure, crumple zones, and robust pillar designs.
ABS:
Anti-lock Braking System (ABS) was available as an option on later models and became more common.
Seatbelts:
Three-point inertia-reel seatbelts for front occupants, lap belts for rear passengers (later models often featured three-point rear belts).
Structure:
Reinforced safety cage, energy-absorbing steering column.
Audio System:
Factory cassette radio with AM/FM, often with optional upgraded speakers and amplifier systems. Analog tuning and controls.
Climate Control:
Manual or optional automatic climate control systems with analog knobs and sliders.
Cruise Control:
Available as an option, operated by a stalk on the steering column.
Connectivity Features:
Limited to factory-installed telecommunications options (e.g., early car phone systems) if optioned.
Oil Change Interval:
Typically every 7,500-10,000 miles (12,000-16,000 km) or annually, depending on driving conditions and oil used.
Tune Up Interval:
Spark plugs and filters typically every 30,000 miles (48,000 km), but can vary.
Timing Belt Replacement:
The M20 engine uses a timing belt, typically recommended for replacement every 50,000-60,000 miles (80,000-96,000 km).
Engine Oil Type:
API SG/SH, SAE 10W-30 or 10W-40 recommended (refer to manual for exact specifications).
Coolant Type:
Ethylene glycol-based antifreeze, mixed 50/50 with distilled water.
Transmission Fluid Type Auto:
Dexron II or equivalent (for ZF 4HP22).
Transmission Fluid Type Manual:
GL-4 gear oil, SAE 75W-90 or 80W-90 recommended.
Electrical Gremlins:
Common issues can include failing headlight relays, faulty door lock actuators, dashboard warning light malfunctions, and degraded wiring insulation due to age. This manual is crucial for diagnosing these.
Engine M20B27 Specifics:
The M20B27 is known for its robust bottom end but can suffer from head gasket issues if overheated, or valve stem seal degradation leading to oil consumption. The 'eta' engine's low-rev tuning also means it's less forgiving of abuse.
Fuel System Maintenance:
Fuel injectors, fuel pump, and fuel pressure regulator may require service or replacement over time.
Brand Legacy:
BMW, Bayerische Motoren Werke AG, has a long history of producing luxury performance vehicles, renowned for engineering, driving dynamics, and quality.
E28 Genesis:
The E28 was the second generation of the BMW 5 Series, succeeding the E12. It was introduced in 1981 and produced until 1988, featuring a more modern and aerodynamic design, updated suspension, and a wider range of engine options.
E28 528E Introduction:
The 528e (often referred to as 'e' for 'eta' - referring to efficiency) was introduced to offer improved fuel economy, utilizing a longer-stroke version of the M20 engine.
Production Period:
1981-1988 (E28 platform)
Manufacturing Locations:
Primarily Germany (Dingolfing plant), with some assembly in other locations.
General Reputation:
The E28 generation is highly regarded for its sophisticated handling, build quality, and driver-focused interior, considered a classic among BMW enthusiasts.
E28 528E Niche:
The 528e specifically was praised for its excellent fuel economy relative to its size and power, making it a sensible luxury sedan for its time.
