🏷️ Basic Information Identification Make: Jeep Model: Wrangler Model Code: TJ Year: 2003 Generation Generation Name: TJ Codes Chassis Code: TJ 👋 Introduction Market Position Segment: Compact SUV / Off-road vehicle Key Selling Points: Off-road capability, iconic design, convertible options, ruggedness Competitive Analysis Competitors 2003: Toyota Tacoma (4x4), Nissan Xterra, Ford Explorer Sport Trac Key Features Jeep Wrangler Tj Distinction: Solid front axle, coil spring suspension, removable doors and top, short wheelbase for maneuverability Manual Value Proposition Value For Owners: Empowers owners to perform maintenance and repairs, saving costs and extending vehicle life 📋 Manual Details Coverage Areas Coverage Scope: Complete official service and repair Covered Models: All 2003 Wrangler TJ models Covered Engines: All 2003 Wrangler TJ engines Page Count Estimated Pages: Likely over 1500 pages (typical for comprehensive service manuals of this era) Manual Type Type: Official Factory Service Manual / Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Engine mechanical, lubrication, cooling, fuel delivery, ignition, emissions, diagnostics, overhaul Transmission: Manual transmission (NV3550), Automatic transmission (42RLE), transfer case (NV241OR 'Rubicon' / NV135 'Sport/Sahara'), clutch, driveline Brakes: Front disc, rear disc (standard for TJ), ABS (if equipped), hydraulic system, parking brake Suspension Steering: Front and rear solid axles, coil springs, shock absorbers, steering gear, power steering system, control arms, linkages Electrical: Battery, charging system, starting system, lighting, instrumentation, power distribution, body electrical, chassis electrical, wiring diagrams Body: Body construction, interior trim, exterior trim, doors, hood, windshield, seats, soft top/hardtop systems, frame HVAC: Heating, ventilation, air conditioning system, components, service, refrigerant handling Safety Features: Airbags (if equipped), seat belts, child seat anchors Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, inspections, lubrication Diagnostics: Troubleshooting procedures, diagnostic trouble codes (DTCs), symptom-based diagnostics, electrical system diagnosis Repair: Step-by-step repair instructions for all major components and systems, component removal and installation, assembly and disassembly Overhaul: Engine rebuild, transmission overhaul, axle rebuild Adjustments: Wheel alignment, clutch adjustment, brake adjustments, idle speed adjustment Technical Depth Depth: Comprehensive, from basic maintenance to complete engine/transmission rebuilds and advanced electrical diagnostics Diagnostic Tools: Includes information on required diagnostic tools, scan tools, and testing equipment Specifications Data: Torque specifications, clearances, tolerances, fluid capacities, electrical specifications, component data 📊 Manual Specifications File Format Format: PDF Searchability: Searchable text for quick information retrieval Printability: Printable pages for on-the-job use Print Quality Quality: High-resolution, clear diagrams and text Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Code: 4.0L Inline-6 (PowerTech) Engine Displacement: 3952 cc (241 cubic inches) Bore X Stroke: 3.878 in x 3.578 in (98.5 mm x 90.9 mm) Compression Ratio: 8.8:1 Horsepower Net: 190 hp @ 4600 rpm Torque Net: 235 lb-ft @ 3200 rpm Fuel System Fuel Delivery: Sequential multi-port fuel injection (MPI) Fuel Type: Unleaded gasoline (87 octane recommended) Engine Variations Optional Engine: 2.4L Inline-4 (97 hp @ 4800 rpm, 135 lb-ft @ 3200 rpm) - Less common for 2003 TJ Engine Management: Chrysler's NGC (Next Generation Controller) or similar OBDI/II compliant system 🔧 Transmission Standard Transmission Type: NV3550 5-speed manual transmission Optional Transmission Type: 42RLE 4-speed automatic transmission Features Transfer Case Rubicon: NV241OR 'Dana 44 Heavy Duty' with 4.0:1 low-range ratio Transfer Case Sport Sahara: NV135 Command-Trac 2-speed transfer case with 2.72:1 low-range ratio Fluid Specifications Manual Transmission Fluid: ATF+4 (MS-9602) or equivalent, 2.3 quarts capacity Automatic Transmission Fluid: ATF+4 (MS-9602) or equivalent, 7.4 quarts capacity Transfer Case Fluid: ATF+4 (MS-9602) or equivalent, 2.0 quarts capacity 📐 Dimensions Exterior Wheelbase: 93.4 inches (2372 mm) Overall Length: 151.9 inches (3858 mm) Overall Width: 66.7 inches (1694 mm) Overall Height: 73.5 inches (1867 mm) (with hardtop) Ground Clearance: Approximately 8.5 inches (216 mm) (stock) Weights Curb Weight: Approx. 3200-3500 lbs (1450-1590 kg) depending on configuration Gross Vehicle Weight Rating Gvwr: Approx. 4450 lbs (2018 kg) 🛡️ Safety Features Ratings NHTSA Rollover Rating: 4 out of 5 stars (for 2-door models in general) Active Features ABS: Optional Anti-lock Braking System (ABS) on 4-wheel disc brakes Passive Features Airbags: Driver and passenger front airbags Seat Belts: Three-point inertia-reel front seat belts, two-point lap belts in rear 💡 Technology Features Infotainment Audio System: Base AM/FM stereo with cassette or optional CD player; Upgraded Infinity sound system available Driver Assistance Cruise Control: Optional Power Windows Locks: Optional on some trims Connectivity Auxiliary Input: Not standard; typically aftermarket addition 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 miles (8,000 km) or 6 months, whichever comes first Air Filter Replacement: Every 15,000 miles (24,000 km) or 12 months Spark Plug Replacement: Every 100,000 miles (160,000 km) for iridium-tipped plugs Fluid Specifications Engine Oil Type: SAE 10W-30 API SJ or SL certified Engine Oil Capacity: 5.0 quarts (4.7 liters) with filter for 4.0L engine Coolant Type: Chrysler/Mopar OAT (Organic Additive Technology) antifreeze or equivalent (Pentofrost G11/G12 compatible) Coolant...