🏷️ Basic Information Identification Make: Audi Model: S4 Year: 2001 Generation Chassis Code: B5 Generation Designation: Second Generation (B5 Facelift) 👋 Introduction Market Position Vehicle Market Segment: High-performance compact executive car (sport sedan). Competitive Analysis Key Competitors: BMW 3 Series (E46) M3, Mercedes-Benz C32 AMG, Subaru Impreza WRX STI (though a slightly different segment). Key Features Vehicle Key Features: Twin-turbocharged V6 engine, legendary Quattro all-wheel-drive system, sporty handling, upscale interior. Manual Value Proposition Manual Benefits: Instant access to essential repair information, cost-effective alternative to expensive shop visits, empowers owners for DIY maintenance and repairs. 📋 Manual Details Coverage Areas Manual Coverage: Comprehensive repair, service, and workshop information for the 2001 Audi S4. Page Count Estimated Page Count: Estimated 1000-1500 pages (typical for comprehensive service manuals of this era, actual not specified). Manual Type Manual Type: Downloadable PDF Repair Manual / Service Manual / Workshop Manual. Language Language: English (presumed based on product description and target market). Format File Format: PDF (Plain, simple, easy to use, no zip files). 📖 Manual Coverage Systems Covered Engine Systems: Engine removal and installation, engine specifications, fuel system, lubrication and cooling system, intake and exhaust. Drivetrain Systems: Transmission, drive chain & sprockets (though primarily focused on internal transmission components for AWD Quattro system). Chassis Systems: Steering system, shocks, body work. Electrical Systems: Electrical system, advanced troubleshooting. Procedures Included Maintenance Procedures: Routine maintenance, fluid changes, filter replacements, scheduled service. Repair Procedures: Engine repair, transmission repair, electrical system diagnosis, component replacement. Troubleshooting Procedures: Advanced troubleshooting for various systems, diagnostic fault finding. Technical Depth Technical Depth: Covers a wide range from routine maintenance to complex repairs and diagnostics, suitable for DIY enthusiasts and professional technicians. 📊 Manual Specifications File Format Digital Format Details: Downloadable PDF, directly accessible after payment, no additional software required. Print Quality Printability: Designed for easy printing of specific pages for on-the-go use or to keep clean. Binding Type Binding Type: N/A (Digital PDF format). Paper Type Paper Type: N/A (Digital PDF format). ⚙️ Engine Specifications Primary Engine Engine Code: APBB (2.7T) Engine Configuration: 2.7L V6, Twin-turbocharged Performance Horsepower: 250 hp @ 5800 rpm Torque: 258 lb-ft @ 1800-4000 rpm Fuel System Fuel Delivery: Bosch Motronic Electronic Fuel Injection (EFI) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Cooling System Coolant Type: G12 (Audi/VW approved ethylene glycol based coolant) Lubrication System Oil Type: Synthetic 5W-40 or 0W-40 (refer to manual for specific VW 502 00 approval) Oil Capacity: 7.1 quarts (6.7 liters) with filter change 🔧 Transmission Standard Transmission Type: 6-speed Manual Transmission Optional Transmission Type: Tiptronic 5-speed Automatic Transmission Features Drivetrain: Quattro All-Wheel Drive (Permanent) Fluid Specifications Manual Transmission Fluid: G 052 171 A2 (or equivalent with correct GL-4/GL-5 rating and viscosity) Automatic Transmission Fluid: G 052 162 A1/A2 (ATF) 📐 Dimensions Exterior Wheelbase: 103.3 inches (2624 mm) Overall Length: 178.6 inches (4536 mm) Overall Width: 69.4 inches (1763 mm) Overall Height: 55.9 inches (1420 mm) Weights Curb Weight: Approximately 3593 lbs (1630 kg) for manual transmission. Gross Vehicle Weight Rating: Not explicitly specified in product info, typically around 4500-4700 lbs. 🛡️ Safety Features Ratings NHTSA Ratings: NHTSA ratings for 2001 model year not readily available in product description, but generally good for the era. Active Features Active Safety Features: Anti-lock Braking System (ABS), Electronic Stability Program (ESP/ASR). Passive Features Passive Safety Features: Front airbags, side airbags, three-point seatbelts. 💡 Technology Features Infotainment Infotainment System: Audi Chorus or Concert CD stereo system with optional Navigation Plus system. Driver Assistance Driver Assistance Features: Cruise control, parking sensors (optional on some trims). Connectivity Connectivity Features: Limited by era, primarily analog systems. Optional CD changer. 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000-7,500 miles (8,000-12,000 km) or 12 months, whichever comes first, using synthetic oil. Timing Belt Interval: Recommended every 60,000-70,000 miles (96,000-112,000 km), a critical maintenance item for this engine. Spark Plug Replacement: Typically around 60,000 miles (96,000 km). Fluid Specifications Brake Fluid Type: DOT 4 Coolant Capacity: Approximately 8.0-8.5 quarts (7.5-8.0 liters). Known Issues Common Issues Engine: PCV system failures leading to boost leaks, coil pack failures, camshaft adjuster solenoid issues, oil sludge buildup if maintenance is neglected. Common Issues Drivetrain: Drive shaft flex joint wear, clutch wear (manual), potential transmission leaks. Common Issues Electrical: Window regulator failures, alarm system glitches, MAF sensor issues, ABS/ESP sensor faults. 📚 Vehicle History Brand Heritage Audi Performance Heritage: Audi has a strong heritage in motorsport, particularly with its Quattro all-wheel-drive system, a legacy carried into its road cars. Model Evolution S4 B5 Evolution: The B5 S4, introduced for the 2000 model year, marked a significant step up in performance for the A4 line with its twin-turbo V6 and standard Quattro. The 2001 model is part of the initial B5 S4 generation. Production Production Years B5 S4: 2000-2002 Manufacturing Locations Manufacturing Locations: Ingolstadt, Germany. 🏆 Awards...