🏷️ Basic Information Identification Make: BMW Model: 3 Series Chassis Code: E21 Engine Variants Covered: 320, 320i, 323i, 325i Codes Internal Codes: E21 Generation 👋 Introduction Market Position Target Audience: BMW dealership mechanics and skilled DIY enthusiasts seeking professional-grade repair information. Competitive Analysis Manual Quality: Considered one of the most comprehensive and authoritative resources for the E21 generation, directly from BMW's technical documentation. Key Features Instruction Style: Step-by-step instructions facilitate complex repairs. Visual Aid Quality: Clear pictures and exploded views enhance understanding of component relationships and assembly. Scope: Encompasses all major mechanical, electrical, and body systems for the specified E21 models. 📋 Manual Details Coverage Areas Vehicle Coverage: BMW 3 Series E21 chassis variants: 320, 320i, 323i, 325i Page Count Total Pages: 600+ Manual Type Type: Service & Repair Manual (Dealership Level) Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, rebuilding, timing, valve adjustments, piston and rod installation, crankshaft and bearing service, cylinder head service, oil pump and system. Engine Fuel System: Carburetor (e.g., Zenith, Solex) overhaul and adjustment, fuel injection (K-Jetronic for later models) system diagnosis and repair, fuel pump and filter replacement, fuel lines. Engine Cooling System: Radiator, water pump, thermostat, hoses, fan clutch, coolant specifications and flushing procedures. Engine Ignition System: Distributor service, spark plug selection and gap, ignition timing, coil and lead testing, electronic ignition components (where applicable). Transmission Manual: Clutch service, gear selection mechanism, transmission disassembly and reassembly, gear oil specifications and capacities, driveshaft and CV joint service. Transmission Automatic: Automatic transmission diagnosis, fluid type and level checks, torque converter service, linkage adjustments (if applicable). Brakes: Disc brake service (front and rear), caliper overhaul, brake pad and rotor replacement, master cylinder, brake booster, parking brake adjustment, brake fluid specifications. Suspension: Front and rear suspension components, shock absorber replacement, ball joint and tie rod end service, wheel alignment specifications, bushings. Steering: Steering gear service, power steering system (if equipped), steering column, tie rods, and linkages. Electrical System: Wiring diagrams, battery, alternator, starter motor, lighting systems (headlights, taillights, interior), fuses and relays, instrument cluster, starting and charging system troubleshooting. Body And Chassis: Body panel removal and installation, doors, hood, trunk, interior trim, glass replacement, chassis component identification, rust repair considerations. Heating Ventilation Air Conditioning: HVAC system components, blower motor, heater core, evaporator core, refrigerant types (R12 for this era), system leak testing, dash control panel. Procedures Included Maintenance: Routine maintenance tasks such as oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement. Troubleshooting: Diagnostic procedures for common drivability issues, electrical faults, cooling system problems, and brake system malfunctions. Repair: Step-by-step instructions for major component repairs and overhauls, including engine rebuilds, transmission repairs, and brake system overhauls. Diagnostics: Detailed diagnostic trees and fault code interpretation (if applicable for the era), using test equipment and visual inspection. Special Tools: Identification of specific tools and equipment required for various repair and maintenance procedures. Technical Depth Depth Of Coverage: Comprehensive: Covers everything from basic maintenance and adjustments to full engine and transmission rebuilds, including detailed diagnostic information. Illustrations: Clear pictures and exploded view illustrations for component identification and assembly/disassembly guidance. Schematics: Inclusion of electrical wiring diagrams and vacuum schematics for accurate troubleshooting and repair. Specifications: Detailed technical specifications for all covered systems, including torque values, clearances, fluid capacities, and performance data. 📊 Manual Specifications File Format Format: PDF Compatibility: Windows, Mac, Linux Print Quality Printability: Printable without restriction Binding Type Binding: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) Searchability Text Search: Yes (typically for PDF manuals, allowing keyword searches) ⚙️ Engine Specifications Primary Engine Engine Type: Inline-4 and Inline-6, SOHC, naturally aspirated 320/320I Engine Code: M10 series (e.g., M10B18, M10B20) 320/320I Displacement: 1.8L (1766 cc) and 2.0L (1990 cc) 323I Engine Code: M20 series (e.g., M20B23) 323I Displacement: 2.3L (2316 cc) 325I Engine Code: M20 series (e.g., M20B25) 325I Displacement: 2.5L (2494 cc) Performance 320I Hp Approx: ~100-105 hp (depending on market and specific version) 323I Hp Approx: ~140-143 hp 325I Hp Approx: ~170-171 hp Fuel System Induction Early Models: Carbureted (e.g., Zenith 35/40 INAT, Solex C32/32 DIDTA) Induction Later Models: Bosch K-Jetronic CIS (Continuous Injection System) for 320i (M10), 323i, and 325i Fuel Type: Unleaded gasoline (premium recommended) 🔧 Transmission Standard Type: 4-speed manual, 5-speed manual ( Getrag 245) Optional Type: 3-speed ZF automatic (e.g., 3HP22) Features Clutch Type: Single dry plate diaphragm spring clutch Rear Axle: Independent rear suspension with semi-trailing arms, limited-slip differential available on some models 📐 Dimensions Exterior Wheelbase: Approx. 2565 mm (101.0 in) Length: Approx. 4350 mm (171.3 in) Width: Approx. 1610 mm (63.4 in) Height: Approx. 1380 mm (54.3 in) Weights Curb Weight: ~1150 - 1250 kg (2535 - 2755 lbs) depending on engine and equipment 🛡️ Safety Features Ratings Era Specific Ratings: Limited official crash...