🏷️ Basic Information Identification Make: BMW Model: Z4 Year: 2004 Generation Generation Designation: E85 Codes Chassis Code: E85 👋 Introduction Market Position Target Audience: BMW Z4 owners seeking to perform their own maintenance and repairs, DIY enthusiasts, independent repair shops Competitive Analysis Advantage Over Print: Instant access, searchability, portability, cost-effectiveness compared to outdated printed manuals Key Features Licensing Origin: Officially licensed information derived from OE (Original Equipment) materials Software Provider: RepairSurge (automotive software company) Access Duration: 1-year subscription with options for renewal discounts 📋 Manual Details Coverage Areas Manual Coverage Scope: Comprehensive service, repair, maintenance, and diagnostics Page Count Estimated Pages: Extensive (digital format, dynamically displayed) Manual Type Manual Type: Online Service and Repair Manual Software Language Language: English Format Digital Format: Web-based application (browser access) 📖 Manual Coverage Systems Covered Engine: Detailed diagnostics, repair procedures, component replacement for 2.5L and 3.0L inline-six engines Drivetrain: Manual and Automatic transmission service, differential, driveshaft, clutch replacement Suspension Steering: Front and rear suspension components, steering rack, power steering system diagnosis and repair Brakes: Brake system hydraulics, ABS, DSC, brake pad/rotor replacement, bleeding procedures Electrical Electronics: Wiring diagrams, component testing, diagnosis of body control module (BCM), DME, EWS, lighting, power windows HVAC: Air conditioning system servicing, heater core, climate control module diagnostics Body Chassis: Body panel repair, convertible top mechanism, interior trim removal and installation Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug service, fluid checks and top-offs Diagnostic Troubleshooting: Step-by-step diagnostic procedures for common and complex issues, fault code interpretation Component Replacement: Detailed instructions for replacing major and minor components across all systems Rebuilding Overhauling: Engine and transmission overhaul procedures (where applicable and documented in OE data) Technical Depth Depth Of Information: Factory-level detail, suitable for professional technicians and advanced DIYers 📊 Manual Specifications File Format Software Compatibility: Accessible via web browser on PC, laptop, smartphone, tablet Print Quality Digital Clarity: High-resolution graphics, diagrams, and text Binding Type Access Method: Online subscription access (1-year included) Paper Type Digital Medium: Not applicable (digital content) ⚙️ Engine Specifications Primary Engine Engine Options: 2.5L M54B25 Inline-6, 3.0L M54B30 Inline-6 Performance 2.5L Horsepower: 189 hp @ 6000 rpm 2.5L Torque: 232 Nm (171 lb-ft) @ 3500 rpm 3.0L Horsepower: 228 hp @ 6000 rpm 3.0L Torque: 300 Nm (221 lb-ft) @ 3500 rpm Fuel System Fuel Delivery: Sequential multi-point fuel injection (SFI), Electronic throttle control (ETC) Engine Management ECU Type: Siemens MS43 or MS45 🔧 Transmission Standard Standard Transmission: 5-speed Getrag manual transmission (S5D 250G for 2.5i, S5D 320Z for 3.0i) Optional Optional Transmission: 5-speed ZF automatic transmission (5HP19) Features Clutch Type: Single dry plate, hydraulic actuation 📐 Dimensions Exterior Length: 4091 mm (161.1 in) Width: 1741 mm (68.5 in) Height: 1292 mm (50.9 in) Wheelbase: 2495 mm (98.2 in) Weights Curb Weight 2.5I: Approx. 1410 kg (3108 lbs) Curb Weight 3.0I: Approx. 1450 kg (3197 lbs) 🛡️ Safety Features Ratings NHTSA Front Impact: 4-star (driver and passenger) Active Features Traction Control: Dynamic Stability Control (DSC) standard Braking Assist: Anti-lock Braking System (ABS) standard Passive Features Airbags: Front airbags, side airbags, rollover protection system (pop-up roll bars) 💡 Technology Features Infotainment Audio System: Available premium audio systems, CD player, optional navigation system Driver Assistance Parking Aids: Optional Park Distance Control (PDC) Connectivity Communication: Optional Bluetooth preparation for mobile phones 🔧 Maintenance Service Intervals Oil Change Interval: Variable (Condition Based Service - CBS), typically 10,000-15,000 miles or annually Brake Fluid Change: Every 2 years (BMW recommends DOT 4) Coolant Change: BMW Blue coolant, long-life, interval typically every 4 years or 60,000 miles Fluid Specifications Engine Oil Type: BMW Longlife-01 (LL-01) synthetic, SAE 0W-40 or 5W-30 (check owner's manual for specific viscosity) Transmission Fluid Manual: Pentosin MTF LT-2 or equivalent (check manual for precise spec) Transmission Fluid Auto: ZF LifeguardFluid6 (for 5HP19) Differential Fluid: SAE 75W-90 synthetic gear oil (GL-5 rated) Known Issues Crankcase Ventilation: Vanos solenoids and eccentric shaft sensor failures on M54 engines, CCV system issues can lead to oil leaks and rough idle. Cooling System: Plastic coolant expansion tank can become brittle and crack, water pump failures Suspension: Worn control arm bushings, ball joints, and sway bar links are common due to the sporty nature and weight distribution. Convertible Top: Hydraulic leaks or pump failures affecting convertible top operation 📚 Vehicle History Brand Heritage Bmw Roadster Legacy: Continues BMW's tradition of agile, driver-focused roadsters like the Z1, Z3, and Z8 Model Evolution Z4 Introduction: First generation (E85) introduced in 2002, replacing the Z3 Roadster Production Manufacturing Location: Spartanburg, South Carolina, USA