🏷️ Basic Information Identification Make: BMW Model: Z4 Covered Model Years: 2004 Generation Generation Codes: E85 (Roadster), E86 (Coupe) Generation Years: 2002-2008 👋 Introduction Market Position Target Audience: BMW Z4 owners, independent repair shops, DIY enthusiasts seeking professional-grade repair information Value Proposition: Provides access to the same detailed, accurate, and comprehensive repair data used by authorized BMW technicians, enabling confident and effective vehicle maintenance and repair. Competitive Analysis Differentiation: Distinguished from generic repair guides by its vehicle-specific nature, factory origin, and inclusion of all repair procedures, wiring schematics, and detailed specifications. Key Features Ease Of Use: Single PDF manual format eliminates the need to search through multiple books, allowing for quick access to required information. Cost Savings: Empowers users to perform complex repairs and maintenance themselves, significantly reducing labor costs associated with dealership service. 📋 Manual Details Coverage Areas Primary Coverage: BMW Z4 (E85/E86) 2004 Model Year Engine Variants Covered: All gasoline engine variants for 2004 model year Body Styles Covered: Roadster (E85), Coupe (E86) Page Count Estimated Page Count: Extensive (typically 1000+ pages for comprehensive factory manuals) Manual Type Type: Factory Service and Repair Manual Language Language: English Format Format: PDF (Digital) Digital Features: Printable, searchable text, zoomable images 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel system, emission control, intake/exhaust, cooling, lubrication, ignition, starting, charging, automatic transmission, manual transmission, clutch Drivetrain: Transfer case (if applicable, though Z4 is RWD), propeller shaft, drive shaft, differential, axle, suspension (front and rear), steering column, power steering Brakes: Brake control systems, hydraulic brakes, parking brake system Electrical: Battery, charging system, ignition system, lighting, instruments, audio/visual, power accessories, body electronics, multiplex/CAN communication Comfort And Convenience: Air conditioning, supplementary restraint system (SRS), seat belts, engine immobilizer, cruise control, wipers and washers, door locks, interior trim, exterior trim, engine hood, glass/mirrors Body And Chassis: Body structure, exterior panels, interior components, glass, mirrors, convertible top mechanisms (E85) Climate Control: Air conditioning system, heater, ventilation, climate control module Procedures Included Maintenance Procedures: Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs, brake pad replacement, spark plug replacement Repair Procedures: Complete disassembly and reassembly of all major components, component-level diagnostics and repair, electrical system troubleshooting and repair, body panel replacement Diagnostic Procedures: Troubleshooting guides, symptom-based diagnostics, electrical system diagnosis using schematics, OBD-II system diagnostics Wiring Schematics: Comprehensive electrical wiring diagrams for all vehicle systems, including troubleshooting pathways. Troubleshooting Charts: Detailed symptom-based troubleshooting guides and flowcharts for diagnosing common problems. Technical Depth Depth: Factory-level, including complete rebuild procedures, detailed torque specifications, diagnostic trouble codes (DTCs), and wiring diagrams Accuracy: Vehicle-specific and authoritatived, reflecting the exact information used by BMW dealership technicians 📊 Manual Specifications File Format File Type: PDF Compatibility: Windows (XP, Vista 32/64, 7, 8, 10), macOS, Linux (via Adobe Reader) Searchability: Text-searchable PDF, allowing users to find specific terms, part numbers, or procedures quickly. Print Quality Printability: Fully printable, allowing users to print specific sections or the entire manual Image Resolution: High-resolution for clear illustrations and diagrams, with zoom capability Binding Type Binding: N/A (Digital format) Paper Type Paper Quality: N/A (Digital format, users print on their preferred paper) ⚙️ Engine Specifications Primary Engine Engine Codes Typical 2004: N52B30 (3.0L Inline-6), M54B30 (3.0L Inline-6 - earlier production models may still have this), M54B25 (2.5L Inline-6) Performance Typical Horsepower 30I: Approximately 255 hp @ 6600 rpm (N52B30) Typical Torque 30I: Approximately 220 lb-ft @ 2750 rpm (N52B30) Typical Horsepower 25I: Approximately 215 hp @ 6500 rpm (M54B25) Typical Torque 25I: Approximately 185 lb-ft @ 3500 rpm (M54B25) Fuel System Injection Type: Electronic Fuel Injection (EFI), typically Bosch Motronic variants Fuel Requirement: Premium Unleaded Gasoline (91 Octane or higher recommended) Cooling Cooling System: Liquid-cooled, pressurized system with electric fan and thermostat 🔧 Transmission Standard Standard Transmission: 6-speed Manual Transmission (e.g., Getrag GS6-37BZ) Optional Optional Transmission: 6-speed Steptronic Automatic Transmission (e.g., ZF 6HP19Z) Features Transmission Fluid Spec Manual: Refer to manual for specific gear oil; typically GL-4 or GL-5 rated. Transmission Fluid Spec Auto: BMW Longlife-01 FE (or equivalent specified by ZF) ATF 📐 Dimensions Exterior Wheelbase E85 Roadster: 2495 mm (98.2 inches) Wheelbase E86 Coupe: 2495 mm (98.2 inches) Weights Curb Weight Range: Approximately 1400-1550 kg (3086-3417 lbs) depending on engine and options Gross Vehicle Weight Rating: Refer to vehicle VIN plate or manual for specific GVWR 🛡️ Safety Features Ratings NHTSA Front Impact Rating: Not explicitly rated for 2004 model year by NHTSA in detailed breakdown for this generation. IIHS Front Impact Rating: Good (for models tested within the generation) Active Features Braking System: Four-wheel disc brakes with Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD), Brake Assist Stability Control: Dynamic Stability Control (DSC) or Dynamic Traction Control (DTC) Passive Features Airbags: Front dual-stage airbags, front side-impact airbags, often front knee airbags Seat Belts: Three-point inertia-reel seat belts with pretensioners and force limiters Rollover Protection: Pop-up...