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BMW 325 325i 1993 Service Repair Workshop Manual
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🏷️ Basic Information Identification Make: BMW Model: 325i Model Variant: 325 Year: 1993 Codes Chassis Code: E36 👋 Introduction Market Position Segment: Compact Executive Sedan/Coupe (E36 generation). Target Audience: Enthusiasts,...
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🏷️ Basic Information
Identification
Make:
BMW
Model:
325i
Model Variant:
325
Year:
1993
Codes
Chassis Code:
E36
👋 Introduction
Market Position
Segment:
Compact Executive Sedan/Coupe (E36 generation).
Target Audience:
Enthusiasts, independent mechanics, BMW owners seeking to maintain or repair their vehicles.
Competitive Analysis
Competitors:
Mercedes-Benz C-Class (W202), Audi 80/90 (B4), Lexus ES (V20).
Key Features
Driving Dynamics:
Renowned for its balanced chassis, rear-wheel drive, and engaging driving experience.
Engine Smoothness:
The M50 inline-six engine is highly regarded for its refinement and power delivery.
Build Quality:
Typical BMW build quality, designed for longevity and performance.
📋 Manual Details
Coverage Areas
Engine Coverage:
M50B25 (2.5L Inline-6)
Transmission Coverage:
Getrag 260/5 (5-Speed Manual), ZF 4HP22 (4-Speed Automatic)
Chassis Coverage:
All aspects of E36 chassis, suspension, steering, brakes, body, and interior.
Electrical Coverage:
Full electrical schematics, components, diagnostics, and wiring diagrams.
Page Count
Estimated Page Count:
1500+
Manual Type
Type:
Service and Repair Workshop Manual
Language
Language:
English
Format
Format:
Digital (PDF)
📖 Manual Coverage
Systems Covered
Engine Mechanical:
Engine assembly, disassembly, internal components, cylinder head, block, crankshaft, pistons, camshafts, timing systems.
Engine Management:
Fuel injection (Bosch Motronic 3.3), ignition system, sensors, actuators, ECU diagnostics, emissions control.
Cooling System:
Radiator, water pump, thermostat, coolant hoses, fan assembly, climate control integration.
Exhaust System:
Exhaust manifolds, catalytic converter, mufflers, oxygen sensors.
Fuel System:
Fuel tank, fuel pump, fuel filter, fuel lines, injectors, pressure regulator.
Drivetrain:
Clutch, transmission (manual/automatic), driveshafts, differential, axle shafts.
Suspension:
Front struts, rear shock absorbers, control arms, bushings, springs, sway bars.
Steering:
Power steering pump, steering rack, tie rods, steering column.
Brakes:
Front ventilated discs, rear solid discs, ABS system (Bosch ABS II), brake lines, calipers, master cylinder.
Body And Frame:
Body panel removal and installation, structural components, rust repair, door mechanisms, hinges.
Interior:
Seating systems, dashboard, trim panels, HVAC controls, interior lighting.
HVAC:
Air conditioning system, heater core, blower motor, controls, refrigerant service.
Electrical System:
Battery, alternator, starter motor, lighting (headlights, taillights, interior), horn, wipers, power windows, central locking.
Instrumentation And Controls:
Instrument cluster, switches, gauges, warning lights, cruise control.
Safety Systems:
Seat belts, airbags (driver/passenger, if equipped for the specific E36 variant), ABS diagnostics.
Procedures Included
Routine Maintenance:
Oil changes, filter replacements (oil, air, fuel), spark plug replacement, fluid checks and top-offs.
Troubleshooting Diagnostics:
Step-by-step diagnostic procedures for engine performance, electrical faults, drivability issues using symptoms.
Engine Repair:
Complete engine rebuild procedures, valve adjustments, head gasket replacement, timing belt/chain (on applicable BMW engines, although M50 has a chain), component replacement.
Transmission Service Repair:
Transmission fluid and filter changes, clutch replacement, transmission removal and installation, internal component repair.
Brake Service:
Brake pad and rotor replacement, caliper service, brake fluid bleeding, ABS system bleeding, parking brake adjustment.
Suspension And Steering Repair:
Replacement of ball joints, tie rod ends, control arm bushings, struts, shock absorbers, power steering system repairs.
Electrical Diagnostics And Repair:
Wiring harness repair, component testing, fuse and relay diagnostics, module replacement.
HVAC System Service:
Refrigerant recharge, leak detection, component replacement (compressor, condenser, evaporator), heater core replacement.
Body And Trim Repair:
Door panel removal, window regulator repair, mirror replacement, bumper repair, panel alignment.
Torque Specifications:
Detailed torque values for all critical fasteners throughout the vehicle.
Tightening Sequences:
Correct sequences for tightening cylinder heads, intake manifolds, etc.
Special Tools:
Identification and use of BMW specific tools required for certain procedures.
Technical Depth
Depth:
Comprehensive, from basic maintenance to complete engine and transmission overhauls, including detailed electrical schematics and diagnostic flowcharts.
📊 Manual Specifications
File Format
Type:
Searchable PDF
Readability:
High-resolution scans of original factory documentation.
Print Quality
Quality:
Excellent, designed for clear printing and readability.
Binding Type
Physical Format Consideration:
N/A (Digital Format)
Paper Type
Physical Format Consideration:
N/A (Digital Format)
⚙️ Engine Specifications
Primary Engine
Code:
M50B25
Type:
Naturally Aspirated Inline-6 (I6)
Displacement:
2494 cc (2.5 Liters)
Bore X Stroke:
84.0 mm x 90.0 mm
Compression Ratio:
10.0:1
Valvetrain:
DOHC, 4 valves per cylinder, Double VANOS (Variable Valve Timing) introduced mid-production for M50TU, but typically not on early 1993 M50B25. Original M50 has single VANOS on intake cam only.
Performance
Horsepower:
189 hp @ 6000 rpm (approx.)
Torque:
181 lb-ft @ 4200 rpm (approx.)
Fuel System
Injection Type:
Bosch Motronic M3.3 Electronic Fuel Injection
Fuel Type:
Premium Unleaded (91 Octane or higher recommended)
Ignition System
Type:
Distributorless Electronic Ignition (DIS) with individual ignition coils.
Cooling System
Capacity:
Approx. 8.5 Liters (with heater)
Coolant Type:
BMW Blue Antifreeze (G48) or equivalent ethylene glycol based coolant with corrosion inhibitors.
Oil System
Oil Capacity:
Approx. 6.5 Liters (with filter)
Recommended Oil Viscosity:
SAE 5W-30 or 5W-40 Synthetic
Recommended Oil Spec:
API SJ or higher, ACEA A3/B3 or higher
🔧 Transmission
Standard
Type:
Getrag 260/5 5-Speed Manual
Optional
Type:
ZF 4HP22 4-Speed Automatic
Features
Manual Gear Ratios:
Refer to manual for specific ratios, typically around 3.72:1 for 1st gear.
Automatic Features:
Lock-up torque converter, electronically controlled for shift points.
Fluid Specifications Manual
Type:
BMW MTF LT-2 or equivalent manual transmission fluid (e.g., Pentosin MTF 2).
Fluid Specifications Automatic
Type:
Dexron III / Mercon ATF
Fluid Capacity Manual
Capacity:
Approx. 1.5 Liters
Fluid Capacity Automatic
Capacity:
Approx. 7.5 Liters (dry fill), 3.5 Liters (fluid change with filter)
📐 Dimensions
Exterior
Wheelbase:
106.1 inches (2695 mm)
Length:
174.5 inches (4432 mm)
Width:
67.5 inches (1715 mm)
Height:
53.9 inches (1370 mm)
Front Track:
55.7 inches (1415 mm)
Rear Track:
56.1 inches (1425 mm)
Wheel Bolt Pattern:
5x120 mm
Wheel Size:
Standard 15x7.0 alloy wheels (optional 16-inch wheels available)
Tire Size:
Standard 205/60VR15 (optional 225/50VR16)
Weights
Curb Weight:
Approx. 3200-3400 lbs (depending on transmission and options)
Cargo
Trunk Volume:
Approx. 14.3 cu ft (0.40 m³)
🛡️ Safety Features
Ratings
NHTSA Front Impact:
4/5 stars (for comparable E36 models)
IIHS Side Impact:
Considered good for its era.
Active Features
ABS:
Standard Bosch ABS II Anti-lock Braking System (4-wheel disc brakes).
Traction Control:
Optional ASC+T (Automatic Stability Control and Traction) available on some models.
Passive Features
Airbags:
Driver airbag standard. Passenger airbag optional or standard on later models within the E36 lifecycle.
Seat Belts:
3-point front seat belts with pretensioners, 3-point rear seat belts.
Crumple Zones:
Designed with front and rear crumple zones for improved impact energy absorption.
💡 Technology Features
Infotainment
Audio System:
Factory BMW Business or Professional CD/Radio systems, often with cassette player. Amplifiers may be present in higher trim levels.
Display:
Basic digital displays for climate control and radio information. No central infotainment screen.
Driver Assistance
Cruise Control:
Electronic cruise control system available as an option.
Parking Assistance:
No factory parking sensors or backup cameras.
Connectivity
Phone Integration:
Optional factory BMW phone preparation kits available for certain models, typically requiring a separate car phone unit.
Diagnostics
OBD Port:
OBD I (On-Board Diagnostics I) system with a 15-pin connector, typically located under the hood or driver's side dash. Manual covers diagnostic procedures and codes.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 7,500 - 10,000 miles (12,000 - 16,000 km) or annually, using synthetic oil.
Air Filter Replacement:
Every 15,000 - 30,000 miles (24,000 - 48,000 km) or as needed based on conditions.
Fuel Filter Replacement:
Every 30,000 - 50,000 miles (48,000 - 80,000 km).
Spark Plug Replacement:
Every 60,000 - 100,000 miles (96,000 - 160,000 km) depending on spark plug type (copper, platinum, iridium).
Coolant Flush:
Every 2-3 years or 30,000 miles.
Brake Fluid Flush:
Every 2 years.
Fluid Specifications
Power Steering Fluid:
BMW Power Steering Fluid (Pentosin CHF 11S is a common alternative, consult manual for exact spec).
Brake Fluid:
DOT 4
Washer Fluid:
Standard automotive washer fluid, or distilled water and a mild detergent.
Known Issues
Cooling System Components:
Plastic coolant expansion tank, water pump impeller (plastic on some early M50s), and radiator hoses can become brittle and fail.
Oil Leaks:
Valve cover gasket, oil pan gasket, and oil filter housing gasket are common leak points.
Suspension Bushings:
Control arm bushings, rear subframe bushings, and shock mounts are prone to wear, affecting handling.
Window Regulators:
Plastic components in the window regulator mechanisms can fail, leading to windows falling into the doors.
ABSorbent Glass Mat (Agm) Battery:
Later E36 models (and some earlier ones) utilize AGM batteries which require specific charging methods.
Vanos System:
Early M50 engines have a single VANOS system on the intake cam. Failures can lead to rough idle and power loss. The sealing rings are a common wear item.
📚 Vehicle History
Brand Heritage
Bmw Philosophy:
BMW's commitment to 'The Ultimate Driving Machine' and engineering excellence.
Model Evolution
E36 Introduction:
The E36 chassis replaced the E30 3 Series and was introduced in 1990. The 325i (with M50 engine) debuted in 1991 for the 1992 model year.
1993 Model Year:
Part of the initial E36 production run, characterized by the M50B25 engine, early interior design elements, and specific chassis configurations.
E36 Facelift:
The E36 received a significant facelift (LCI) in 1996, including revised bumpers, headlights, and interior updates. The 1993 model predates this.
Production
Production Years:
1990-2000 (E36 generation)
Manufacturing Locations:
Germany (Dingolfing, Munich), South Africa, Austria, Thailand, Brazil, Russia, Mexico.
🏆 Awards & Recognition
Recognitions
Car And Driver 10Best:
The E36 3 Series was frequently recognized on Car and Driver's 10Best list in various configurations during its production run.
Ratings
Consumer Reports Reliability:
Varied by model year and specific component; general reliability is considered good with proper maintenance, but certain common wear items require attention.
Certifications
Manual Quality:
Developed by BMW AG for use by authorized service centers and technicians.