🏷️ Basic Information

Make:

BMW

Model:

525i / 535i

Chassis Code:

E34

Year Range:

1988-1989

Product Type:

Electrical Troubleshooting Manual

Engine Code 525I:

M20B25 (likely, common for 525i E34 of this era)

Engine Code 535I:

M30B35 (likely, common for 535i E34 of this era)

Generation Designation:

First Generation E34

Production Start Date Coverage:

June 1988

Production End Date Coverage:

February 1989

📋 Manual Details

Primary Focus:

Electrical Systems and Troubleshooting

Secondary Coverage:

Engine Control, Charging, Starting, Transmission Control, Safety Systems (SRS, ABS, Slip Control), Power Accessories (Mirrors, Windows, Seats, Sunroof, Locks, Horn), Lighting (Headlights, Fog Lights, Turn Signals, Parking/Tail Lights, Brake Lights, Interior Lights), Climate Control, Audio Systems, Telephony, Cruise Control, Anti-Theft System, On-Board Computer

Diagrams And Illustrations:

Includes illustrations, diagrams, depth illustrations, and step-by-step explanations

Component Locations:

Component Location Charts, Component Location Views, Splice Location Views, Connector Views

Reference Source:

Identical manual used by professional garages/workshops

Page Count Estimate:

Not specified, but comprehensive based on content list

Type:

Technical Service Manual / Electrical Troubleshooting Manual

Language:

English (implied by content and typical market for such manuals)

⚙️ Engine Specifications

Engine 525I:

Inline 6-cylinder, naturally aspirated (likely M20B25)

Engine 535I:

Inline 6-cylinder, naturally aspirated (likely M30B35)

Horsepower 525I Approx:

170-180 hp (estimated for M20B25)

Torque 525I Approx:

210-220 Nm (estimated for M20B25)

Horsepower 535I Approx:

210-220 hp (estimated for M30B35)

Torque 535I Approx:

305-315 Nm (estimated for M30B35)

Fuel Injection Type:

Bosch Motronic (common for this era BMW)

Fuel Type:

Unleaded Gasoline

Engine Management System:

Electronic Engine Control (EEC)

Emission Controls:

Catalytic Converter (standard)

🔧 Transmission

Transmission Type 525I:

5-speed Manual (likely)

Transmission Type 535I:

5-speed Manual (likely)

Transmission Type 525I Optional:

4-speed Automatic (likely, e.g., ZF 4HP22)

Transmission Type 535I Optional:

4-speed Automatic (likely, e.g., ZF 4HP22)

Electronic Control:

Electronic Transmission Control

📐 Dimensions

Body Style:

Sedan (Saloon) / Touring (Wagon - introduced later, but this manual covers early E34)

Wheelbase Mm:

2760 (for E34 sedan)

Length Mm:

4720 (for E34 sedan)

Width Mm:

1750 (for E34 sedan)

Height Mm:

1410 (for E34 sedan)

Curb Weight Kg Approx 525I:

1500-1600 kg (estimated)

Curb Weight Kg Approx 535I:

1600-1700 kg (estimated)

🛡️ Safety Features

Crash Safety Features:

Crumple zones, reinforced passenger cell

Supplemental Restraint System:

SRS (Airbag system, likely driver-side only for early models)

Slip Control System:

ABS (Anti-lock Braking System)

Seat Belt Pre Tensioners:

Likely present

Crash Control Module:

Present for managing safety systems

🔧 Maintenance

Oil Change Interval Recommendation:

Refer to manual for specific intervals (typically 7,500-10,000 miles or 1 year)

Tune Up Recommendation:

Refer to manual for specific intervals and components

Engine Oil Type:

Refer to manual for specific viscosity grade (e.g., 5W-30, 10W-40 synthetic)

Coolant Type:

Ethylene Glycol-based (BMW Blue or compatible antifreeze)

Brake Fluid Type:

DOT 4

Transmission Fluid Automatic:

Refer to manual for specific ATF type (e.g., Dexron III or equivalent)

Power Steering Fluid Type:

Refer to manual for specific type (e.g., ATF or dedicated power steering fluid)