🏷️ Basic Information Identification Make: Nissan Model: Sentra Year: 2004 Codes Chassis Code: B15 Generation Generation Code: 6th Generation 👋 Introduction Market Position Positioning: Targeted at DIY enthusiasts and independent repair shops seeking accurate, factory-sourced information for the 2004 Nissan Sentra. Competitive Analysis Competitors: Haynes manuals, Chilton manuals, unofficial online forums, pirated service manuals. RepairSurge's advantage is official licensing and OE data derivation. Key Features Convenience: Instant online access, compatible with multiple devices (PC, laptop, smartphone, tablet). Data Source: Licensed information derived from Original Equipment (OE) materials, ensuring accuracy. Value Proposition: Cost savings compared to professional repair services and traditional printed manuals. Subscription Model: One-year access with discounts for extended periods. 📋 Manual Details Coverage Areas Primary Coverage: North America Page Count Estimated Pages: Extensive (Digital Access) Manual Type Type: Service and Repair Manual Software Language Language: English Format Format: Online Software (Web Browser Accessible) 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanicals, fuel system, ignition system, emissions control, cooling system, lubrication system, starting and charging system, engine performance diagnostics. Drivetrain Systems: Manual transmission, automatic transmission, clutch, drive shafts, axles, differentials. Suspension Steering: Front and rear suspension components, struts, shocks, springs, control arms, steering gear, power steering system, wheel alignment. Brake Systems: Front and rear brakes (disc/drum), anti-lock braking system (ABS), parking brake, hydraulic system. Electrical Systems: Battery, charging system, starting system, lighting, instruments, power accessories, body control modules, diagnostic trouble codes (DTCs), wiring diagrams. HVAC Systems: Heating, Ventilation, and Air Conditioning (HVAC) system components, refrigerant handling, diagnostics. Body Exterior Interior: Body panel repair, interior trim, doors, glass, seats, safety restraints. Procedures Included Maintenance: Scheduled maintenance (oil changes, filter replacements, fluid checks), tune-ups, belt replacements, spark plug replacement. Repair: Component removal and installation, troubleshooting, diagnostic procedures, component testing. Diagnostics: Step-by-step diagnostic flowcharts, symptom-based troubleshooting, use of diagnostic tools (OBD-II). Technical Depth Depth: Comprehensive (from basic maintenance to in-depth diagnostics and repairs). 📊 Manual Specifications File Format Accessibility: Web browser-based, requires internet connection. Print Quality Print Capability: Printable pages available through web browser interface. Binding Type Binding: Not Applicable (Digital Access) Paper Type Paper: Not Applicable (Digital Access) ⚙️ Engine Specifications Primary Engine Engine Code And Description: QR25DE: 2.5L DOHC 16-valve inline-4 cylinder engine. Performance Horsepower: Approximately 165-175 hp (varies slightly by trim and specific configuration). Torque: Approximately 175-185 lb-ft. Fuel System Fuel Delivery: Electronic Multi-Point Fuel Injection (MPI). Fuel Type: Unleaded gasoline, 87 octane recommended. Technical Details Bore X Stroke: 95.5 mm x 86.0 mm Compression Ratio: 9.5:1 Valvetrain: Dual Overhead Camshafts (DOHC), 4 valves per cylinder, Continuously Variable Valve Timing Control (CVTCS) on some variants. 🔧 Transmission Standard Transmission Type: 5-speed Manual Transmission. Optional Transmission Type: 4-speed Automatic Transmission (Optional). Features Automatic Features: Electronic control, likely with overdrive. 📐 Dimensions Exterior Length: Approximately 171.5 inches (4356 mm). Width: Approximately 67.7 inches (1720 mm). Height: Approximately 56.3 inches (1430 mm). Wheelbase: Approximately 102.4 inches (2600 mm). Weights Curb Weight: Approximately 2800-2950 lbs (1270-1340 kg). 🛡️ Safety Features Ratings NHTSA Front Driver: 4 out of 5 stars (for models equipped with side airbags). NHTSA Front Passenger: 5 out of 5 stars. IIHS Side Impact: Good (for models with side airbags). Active Features ABS: Anti-lock Braking System (ABS) available/standard on higher trims. Passive Features Airbags: Front airbags standard. Optional front-seat side-impact airbags and roof-mounted curtain airbags. Seatbelts: Three-point active seatbelts with pretensioners and load limiters for front seats. 💡 Technology Features Infotainment Audio System: Standard AM/FM/CD player with optional premium audio and subwoofer. Steering wheel audio controls on some trims. Driver Assistance Cruise Control: Standard on most trims. Connectivity Power Accessories: Power windows, power door locks, power mirrors. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 3 months, or 7,500 miles/6 months with synthetic oil, under normal driving conditions. Air Filter Replacement: Inspect every 15,000 miles, replace as needed (typically every 30,000 miles). Spark Plug Replacement: Platinum-tipped plugs: approx. 100,000 miles. Standard plugs: approx. 30,000 miles. Transmission Fluid Change: Manual: Inspect annually, change as needed. Automatic: Every 30,000-60,000 miles depending on driving conditions. Fluid Specifications Engine Oil Type: SAE 5W-30, API SJ or higher (check owner's manual for specific recommendation). Coolant Type: Nissan Genuine Super Long Life Coolant (Blue) or equivalent. Brake Fluid Type: DOT 3. Transmission Fluid Manual: API GL-4, SAE 75W-85. Transmission Fluid Automatic: Nissan Genuine ATF Matic D or equivalent. Known Issues Engine Oil Consumption: Some QR25DE engines may experience higher than average oil consumption, especially at higher mileage. Regular checks are crucial. Exhaust Manifold Cracks: The cast iron exhaust manifold can develop cracks, leading to exhaust leaks and ticking noises. Suspension Noise: Front suspension components (struts, bushings) can wear out, leading to knocking or rattling noises. Power Window Motors: Failure of power window motors can occur. 📚 Vehicle History Brand Heritage Nissan Legacy: Nissan has a long history of producing reliable and practical compact...