🏷️ Basic Information

Make:

BMW

Model:

5 Series

Chassis Code:

E28

Model Variant:

528e, 535i

Year:

1986

Engine Code 528E:

M20B27 (2.7L Inline-6)

Engine Code 535I:

M30B34 (3.4L Inline-6)

👋 Introduction

Target Audience:

Professional technicians, independent mechanics, and advanced DIY enthusiasts seeking detailed electronic troubleshooting for the E28 5 Series.

Differentiation:

Focuses specifically on electronic troubleshooting, offering a more specialized and in-depth resource than generic repair manuals for this particular aspect of the E28 platform.

Data Accuracy:

Technical data maintained like original manufacturer books, ensuring accuracy and reliability for diagnostics.

Accessibility:

Instant download provides immediate access to critical repair information, saving time compared to sourcing physical manuals.

📋 Manual Details

Primary Coverage:

Electronic Troubleshooting

Secondary Coverage:

General Maintenance, Engine Service/Repair, Transmission Service/Repair, Brake System, Electrical System, Suspension, Steering, Cooling System, Fuel Injection, Fuel System, Emission System, Heater/Air Conditioning, Engine Control System, Chassis/Body, Restraint System, Interior, Differential/Drive, Axle

Estimated Pages:

Hundreds to Thousands (Printable Quality)

Type:

Factory Service Repair Manual (Electronic Troubleshooting Focus)

Language:

English

File Format:

PDF

Delivery Method:

Instant Download

Software Requirements:

Adobe PDF Reader, WinZip (for larger files)

System Compatibility:

All Versions of Windows & Mac

📖 Manual Coverage

Engine Control:

Detailed coverage of engine management systems, including Motronic (for M30) and Bosch L-Jetronic (for M20) where applicable, ECU diagnostics, sensor inputs, and actuator outputs.

Fuel Injection:

In-depth troubleshooting of fuel delivery, injector operation, fuel pressure regulators, and related electronic components for both 528e and 535i models.

Wiring Diagrams:

Comprehensive, factory-level wiring schematics for all major electrical systems, including lighting, ignition, starting, charging, accessories, and control modules.

Diagnostics:

Specific diagnostic procedures for common electrical faults, including testing of relays, switches, sensors, wiring harnesses, and control units.

Automatic Transmission Troubleshooting:

Electronic control unit (TCU) diagnosis, shift solenoids, speed sensors, and hydraulic control circuits for automatic transmissions.

Manual Transmission Diagnostics:

While primarily electronic troubleshooting, it likely covers electrical aspects related to reverse lights, clutch interlocks, and speed sensors.

Troubleshooting Methodology:

Step-by-step diagnostic routines, fault code interpretation (if applicable for the era), and systematic problem-solving approaches for electronic issues.

Component Testing:

Detailed procedures for testing the functionality of electronic components such as ignition coils, fuel injectors, sensors (e.g., MAF, TPS, O2), control modules, and actuators.

Wiring Repair:

Guidance on identifying and repairing damaged wiring, connector issues, and intermittent electrical faults.

Depth:

Advanced diagnostic and repair procedures focusing on the electronic control systems that manage engine, transmission, and other vehicle functions. Includes detailed schematics and pinpoint tests.

📊 Manual Specifications

PDF Quality:

High quality, printable pages as described by the seller.

Searchability:

Likely searchable PDF text, facilitating quick information retrieval.

Printability:

Designed for printing with 'GREAT QUALITY'.

Binding:

Digital Download (no physical binding)

Paper Type:

N/A (Digital)

⚙️ Engine Specifications

528E Engine:

M20B27, 2.7L (2693cc) SOHC Inline-6, featuring Bosch Motronic or L-Jetronic fuel injection (depending on specific market/build date).

535I Engine:

M30B34, 3.4L (3430cc) SOHC Inline-6, typically equipped with Bosch Motronic fuel injection.

528E Horsepower:

Approx. 121-127 hp (depending on market and specific engine tune)

528E Torque:

Approx. 170-174 lb-ft

535I Horsepower:

Approx. 182-189 hp

535I Torque:

Approx. 214-220 lb-ft

Injection System 528E:

Bosch L-Jetronic or Motronic (depending on model year and region)

Injection System 535I:

Bosch Motronic

Ignition Type:

Electronic ignition controlled by Motronic/L-Jetronic ECU.

🔧 Transmission

528E Transmission:

4-speed automatic (e.g., ZF 4HP22)

535I Transmission:

5-speed manual (Getrag 260/5)

528E Transmission Option:

5-speed manual (Getrag 260/5)

535I Transmission Option:

4-speed automatic (e.g., ZF 4HP22)

Electronic Control:

Automatic transmissions feature electronic control (TCU) for shift points and logic.

📐 Dimensions

Length:

Approx. 191.1 in (4854 mm)

Width:

Approx. 68.3 in (1735 mm)

Height:

Approx. 55.4 in (1407 mm)

Curb Weight 528E:

Approx. 3250-3400 lbs (1474-1542 kg)

Curb Weight 535I:

Approx. 3400-3550 lbs (1542-1610 kg)

🛡️ Safety Features

Crash Test Data Availability:

Specific NHTSA/IIHS ratings for 1986 models may be limited; refer to contemporary road tests for general safety impressions.

Braking System:

Four-wheel disc brakes (vented front, solid rear). ABS (Anti-lock Braking System) was an optional feature on later E28 models, potentially available on late '86 cars.

Seat Belts:

Three-point front seat belts, lap belts in rear.

Headrests:

Front and rear headrests.

Rollover Protection:

Reinforced A-pillars and roof structure.

💡 Technology Features

Audio System:

Factory AM/FM stereo cassette player, often with premium speaker options. Limited integration with external devices by modern standards.

ABS Availability:

Optional Anti-lock Braking System (ABS) available on some later models.

HVAC System:

Manual or optional automatic climate control with A/C.

🔧 Maintenance

Oil Change Interval:

Typically every 5,000-7,500 miles or annually (refer to specific manual for precise intervals based on driving conditions).

Timing Belt Replacement:

M20 and M30 engines use timing chains, which are generally designed for the life of the engine but may require tensioner or guide inspection/replacement.

Engine Oil 528E:

SAE 15W-40 or 20W-50 API SG or higher (check original manual for specific BMW approval).

Engine Oil 535I:

SAE 10W-40 or 10W-50 API SG or higher (check original manual for specific BMW approval).

Coolant Type:

Ethylene Glycol based antifreeze (e.g., BMW blue coolant or equivalent), mixed 50/50 with distilled water.

Transmission Fluid Automatic:

Dexron II or Dexron III (e.g., ZF TE-ML 14A).

Transmission Fluid Manual:

SAE 75W-90 or 80W-90 GL-4 gear oil.

E28 Common Problems:

Cooling system leaks (radiator, hoses, water pump), aging wiring insulation, fuel distributor issues (L-Jetronic), starter motor problems, differential seals, and window regulator failures. Electronic control unit (ECU) failures can also occur.

Rust Prone Areas:

Fender arches, rocker panels, rear window seals, and sunroof drains.

📚 Vehicle History

Bmw Philosophy:

BMW's reputation for 'The Ultimate Driving Machine' was firmly established with the E28, emphasizing performance, handling, and driver engagement.

E28 Introduction:

The E28 generation (introduced globally in 1981) was the successor to the E12 5 Series, featuring updated styling, improved aerodynamics, and more advanced technology.

E28 Facelift:

The 1986 model year represents the later phase of the E28's production, potentially including minor updates and refinements.

Manufacturing Locations:

Primarily manufactured in Dingolfing, Germany.

🏆 Awards & Recognition

Contemporary Reviews:

Consistently praised by automotive journalists for its balanced handling, powerful engines (especially the M30), and build quality, earning it a strong reputation among luxury sports sedans of its era.