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BMW 325 325i 1990 Best Service Repair Manual
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Basic Information Identification Make: BMW Model: 325i Model Variant: 325 Year: 1990 Codes Chassis Code: E30 Introduction Market Position Era: Late 1980s / Early 1990s performance sedan Segment: Compact Executive/Sports...
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| Basic Information | |
| Identification | |
| Make: | BMW |
| Model: | 325i |
| Model Variant: | 325 |
| Year: | 1990 |
| Codes | |
| Chassis Code: | E30 |
| Introduction | |
| Market Position | |
| Era: | Late 1980s / Early 1990s performance sedan |
| Segment: | Compact Executive/Sports Sedan |
| Competitive Analysis | |
| Competitors: | Mercedes-Benz W201 (190E), Audi 80/90, Alfa Romeo 75, Acura Legend (early models) |
| Key Features | |
| Driving Dynamics: | Renowned for balanced chassis, RWD handling, driver engagement |
| Powertrain: | Smooth and responsive M20 inline-six engine |
| Design: | Iconic E30 design, subtle yet sporting aesthetics |
| Manual Details | |
| Coverage Areas | |
| Primary Coverage: | Complete factory service and repair |
| Secondary Coverage: | Maintenance, troubleshooting, diagnostics, repair procedures, electrical diagrams, specifications |
| Page Count | |
| Estimated Page Count: | Hundreds (specific number not provided in product info, but implies a comprehensive manual) |
| Manual Type | |
| Type: | Factory Service Repair Manual |
| Language | |
| Language: | English |
| Format | |
| Format: | Downloadable PDF |
| Manual Coverage | |
| Systems Covered | |
| Engine: | M20B25 inline-six, engine management, fuel injection (Bosch Motronic), ignition, cooling, lubrication, exhaust |
| Transmission: | Getrag 260 5-speed manual, ZF 4HP22 4-speed automatic, clutch system, driveshaft, differential |
| Drivetrain: | Rear-wheel drive (RWD), axle shafts, wheel bearings |
| Suspension: | Front MacPherson struts, rear semi-trailing arms, springs, shock absorbers, bushings, anti-roll bars |
| Steering: | Recirculating ball power steering system, steering column, tie rods |
| Brakes: | Front vented discs, rear solid discs, hydraulic system, ABS (Anti-lock Braking System) components and diagnostics |
| Electrical: | Full wiring diagrams, battery, alternator, starter, lighting system, fuse box, relays, body electronics, instrument cluster |
| Bodywork: | Body panel removal and installation, interior trim, exterior trim, glass, seals, bumpers |
| Heating And Air Conditioning: | HVAC system, blower motor, evaporator, condenser, refrigerant system, climate controls |
| Procedures Included | |
| Maintenance: | Scheduled maintenance, oil changes, filter replacements, spark plugs, timing belts (if applicable to M20 - typically chain driven), coolant flushes |
| Troubleshooting: | Diagnostic flowcharts for common issues, symptom-based diagnosis |
| Repair: | Detailed step-by-step instructions for component removal, disassembly, repair, reassembly, and installation |
| Diagnostics: | On-board diagnostics (OBD-I) procedures, fault code retrieval and interpretation for Motronic system |
| Adjustments: | Valve clearance adjustments, idle speed control, timing adjustments (if applicable) |
| Technical Depth | |
| Depth: | Comprehensive, from basic fluid checks to complete engine and transmission rebuilds, in-depth electrical system analysis |
| Manual Specifications | |
| File Format | |
| File Type: | |
| Print Quality | |
| Quality: | High-resolution, printable pages |
| Binding Type | |
| Binding: | N/A (Downloadable PDF, user prints and binds) |
| Paper Type | |
| Paper Recommendation: | Standard printer paper (user dependent) |
| Engine Specifications | |
| Primary Engine | |
| Engine Code: | M20B25 |
| Configuration: | Inline 6-cylinder, SOHC |
| Displacement: | 2.5 Liters (2494 cc) |
| Performance | |
| Horsepower: | 168 hp @ 5800 rpm (approx.) |
| Torque: | 164 lb-ft @ 4750 rpm (approx.) |
| Fuel System | |
| Injection Type: | Bosch Motronic ML-1.3 electronic fuel injection |
| Fuel Type: | Unleaded gasoline, 91-93 octane recommended |
| Ignition | |
| System Type: | Distributorless ignition system (DIS) via Motronic |
| Cooling | |
| System Type: | Pressurized liquid cooling system |
| Lubrication | |
| System Type: | Wet sump lubrication system |
| Timing | |
| Drive: | Timing chain |
| Transmission | |
| Standard | |
| Type: | Getrag 260 5-speed manual |
| Optional | |
| Type: | ZF 4HP22 4-speed automatic |
| Features | |
| Clutch: | Hydraulically actuated single dry plate clutch (manual transmission) |
| Fluid Manual: | BMW recommends MTF LT-2 or equivalent API GL-4 SAE 75W-90 (check manual for specific PN) |
| Fluid Automatic: | ATF Dexron III or equivalent (check manual for specific PN) |
| Dimensions | |
| Exterior | |
| Wheelbase: | 100.1 inches (2543 mm) |
| Length: | 170.5 inches (4331 mm) |
| Width: | 66.7 inches (1694 mm) |
| Height: | 54.2 inches (1377 mm) |
| Weights | |
| Curb Weight Manual: | 2900-3000 lbs (approx.) |
| Curb Weight Automatic: | 2950-3050 lbs (approx.) |
| Safety Features | |
| Ratings | |
| NHTSA Frontal Impact: | Not rated under modern standards (vehicle predates comprehensive NHTSA testing regimes) |
| Active Features | |
| ABS: | Standard Anti-lock Braking System (ABS) |
| Traction Control: | Optional (ASC - Automatic Stability Control) on some later E30 models, less common on 1990 325i |
| Passive Features | |
| Airbags: | Driver-side airbag standard for 1990 model year |
| Seatbelts: | 3-point inertia reel seatbelts front and rear |
| Body Structure: | Reinforced chassis and safety cage construction |
| Technology Features | |
| Infotainment | |
| Radio: | Factory AM/FM cassette player (e.g., Bavaria C or similar) with optional CD changer |
| Speakers: | Typically 4-6 speakers |
| Driver Assistance | |
| Cruise Control: | Optional |
| Connectivity | |
| Diagnostics: | OBD-I diagnostic port for engine management system (Motronic) |
| Maintenance | |
| Service Intervals | |
| Oil Change: | Every 5,000-7,500 miles or annually, whichever comes first (depending on driving conditions) |
| Coolant Flush: | Every 2-3 years or 30,000 miles |
| Transmission Fluid: | Manual: Check for leaks, change as per manual (often longer intervals). Automatic: Every 30,000-60,000 miles. |
| Spark Plugs: | Every 30,000-60,000 miles (depending on plug type) |
| Fluid Specifications | |
| Engine Oil: | API SG or higher, SAE 10W-40 or 15W-50 (check manual for exact BMW specification) |
| Coolant: | BMW Blue Antifreeze/Coolant (G48) or equivalent, mixed 50/50 with distilled water |
| Brake Fluid: | DOT 3 or DOT 4 (check manual for specific recommendation), flush every 2 years |
| Known Issues | |
| Cooling System: | Cracked plastic expansion tanks, failing water pumps, radiator leaks |
| Fuel System: | Leaking fuel injectors, failing fuel pump, clogged fuel filter |
| Electrical: | Wiring harness degradation (especially around engine bay), alternator issues, starter motor failure, instrument cluster board issues |
| Suspension: | Worn bushings (control arm, trailing arm), worn shock absorbers, strut mount failure |
| Engine: | Head gasket leaks (less common on M20 than some other BMW engines), oil pan gasket leaks, timing chain guides (though typically robust) |
| Vehicle History | |
| Brand Heritage | |
| Brand Focus: | BMW's long-standing reputation for performance, luxury, and engineering excellence |
| Model Evolution | |
| E30 Generation: | Second generation of the 3 Series, introduced in 1982, known for its driving purity and iconic design |
| 325I Introduction: | The 325i designation signified the larger 2.5L engine, offering a significant step up in performance from earlier 320i models |
| Production | |
| Manufacturing Location: | Germany (primarily Dingolfing and Munich) |
| Production Years E30: | 1982-1994 (sedan variants often ended production earlier, around 1991) |
| Awards & Recognition | |
| Recognitions | |
| Automotive Press: | Consistently praised by automotive press of its era for handling, build quality, and performance, often considered a benchmark sports sedan. |