Segment:
        
        
            Compact Executive Car (CD-segment).
        
     
    
        
            Target Audience:
        
        
            Individuals seeking a premium, well-engineered European sedan or wagon with sophisticated technology and driving dynamics.
        
     
    
    
        
            Key Competitors:
        
        
            BMW 3 Series, Mercedes-Benz C-Class, Lexus IS.
        
     
    
    
        
            Design Philosophy:
        
        
            Understated elegance, quality interior materials, refined ride and handling.
        
     
    
        
            Powertrain Options:
        
        
            Available with a range of gasoline engines, including naturally aspirated inline-four and V6, and TDI diesel engines in some markets.
        
     
    
        
            Drivetrain:
        
        
            Front-wheel drive (FWD) standard, with Audi's signature quattro all-wheel drive (AWD) system as a highly desirable option.
        
     
 
    
    
    
        
            Powertrain:
        
        
            Engine mechanical, fuel injection, ignition system, fuel system, exhaust system.
        
     
    
        
            Drivetrain:
        
        
            Transmission (manual and automatic), clutch, driveshafts, differential.
        
     
    
        
            Chassis:
        
        
            Suspension (front and rear), steering system, wheel bearings, brake system (hydraulic and parking brake).
        
     
    
        
            Electrical:
        
        
            Wiring diagrams, lighting, starting system, charging system, ignition system, instrumentation, comfort systems, power accessories, engine control unit (ECU) diagnostics.
        
     
    
        
            Body:
        
        
            Body construction, exterior panels, doors, hood, trunk, glass, interior trim, seating, heating, ventilation, and air conditioning (HVAC).
        
     
    
    
        
            Maintenance:
        
        
            Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement.
        
     
    
        
            Diagnostics:
        
        
            Troubleshooting guides, diagnostic trouble codes (DTCs), symptom-based diagnostics for various systems.
        
     
    
        
            Repair:
        
        
            Detailed step-by-step repair procedures for all major components and systems, including engine overhaul, transmission repair, brake caliper replacement, suspension component replacement.
        
     
    
        
            Adjustment:
        
        
            Alignment procedures, clutch adjustment, parking brake adjustment, idle speed adjustment.
        
     
    
        
            Installation:
        
        
            Component replacement, sensor installation, accessory installation (where applicable).
        
     
    
    
        
            Depth:
        
        
            Factory-level detail, suitable for professional technicians and advanced DIY enthusiasts. Includes torque specifications, clearances, diagnostic procedures, and wiring diagrams.
        
     
 
    
    
    
        
            Engine Code:
        
        
            AEB (for 1.8T, common in North America)
        
     
    
        
            Engine Type:
        
        
            Inline 4-cylinder, turbocharged, 20-valve
        
     
    
        
            Displacement:
        
        
            1.8 Liters (1781 cc)
        
     
    
        
            Bore X Stroke:
        
        
            81.0 mm x 86.4 mm
        
     
    
    
        
            Horsepower Est:
        
        
            150 PS (148 hp; 110 kW) at 5700 rpm
        
     
    
        
            Torque Est:
        
        
            210 Nm (155 lb-ft) at 1750-4600 rpm
        
     
    
    
        
            Injection Type:
        
        
            Bosch Motronic M 5.2.2 (or similar electronic multi-point fuel injection)
        
     
    
    
        
            Required Octane:
        
        
            Premium Unleaded Gasoline (91 Octane or higher recommended)
        
     
    
    
        
            Type:
        
        
            Distributorless Ignition System (DIS) with coil-on-plug or coil pack setup.
        
     
    
    
        
            Coolant Type:
        
        
            G12 (or equivalent ethylene glycol-based antifreeze with corrosion inhibitors)
        
     
 
    
    
    
        
            Type:
        
        
            5-speed Manual Transmission (e.g., 012 series)
        
     
    
    
        
            Type:
        
        
            5-speed Tiptronic Automatic Transmission (with manual shifting mode)
        
     
    
        
        Transmission Fluid Manual
    
 
    
        
            Fluid Type:
        
        
            G 052 171 A1 (or equivalent manual transmission fluid)
        
     
    
        
        Transmission Fluid Automatic
    
 
    
        
            Fluid Type:
        
        
            G 055 025 (or equivalent ATF for Tiptronic transmission)
        
     
    
    
        
            AWD System:
        
        
            Torsen center differential (for quattro models), providing self-locking torque distribution.
        
     
 
    
    
    
        
            NHTSA Front Crash Est:
        
        
            Likely 4-star for driver, 4-star for passenger (based on typical B5 A4 ratings).
        
     
    
    
        
            ABS:
        
        
            Standard Anti-lock Braking System (ABS).
        
     
    
        
            Traction Control:
        
        
            Available Electronic Stability Control (ESC) or Traction Control System (ASR) on some models, particularly quattro.
        
     
    
    
        
            Airbags:
        
        
            Standard front airbags, optional side airbags.
        
     
    
        
            Seatbelts:
        
        
            3-point inertia-reel seat belts with pre-tensioners.
        
     
    
        
            Rollover Protection:
        
        
            Reinforced body structure.
        
     
 
    
    
    
        
            Audio System:
        
        
            Factory AM/FM radio with CD player or cassette tape. Aftermarket head units are common upgrades.
        
     
    
        
            Display:
        
        
            Small LCD display for radio and climate control information. Some models may have optional navigation systems.
        
     
    
    
        
            Cruise Control:
        
        
            Standard on most models.
        
     
    
        
            Parking Sensors:
        
        
            Not commonly equipped on the B5 generation.
        
     
    
    
        
            Phone Integration:
        
        
            Limited to aftermarket Bluetooth kits or early car phone integrations.
        
     
    
    
        
            Headlights:
        
        
            Halogen headlights; Xenon HID was an option on higher trims or later models, but not standard for 1997.
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Every 7,500 miles (12,000 km) or 12 months, whichever comes first (under normal driving conditions).
        
     
    
        
            Air Filter Replacement:
        
        
            Every 15,000 miles (24,000 km) or 24 months.
        
     
    
        
            Spark Plug Replacement Gasoline:
        
        
            Every 30,000 miles (48,000 km) for standard spark plugs; longer intervals for platinum/iridium plugs if equipped.
        
     
    
        
            Timing Belt Replacement:
        
        
            Typically every 60,000 miles (96,000 km) or 5 years for 4-cylinder engines (check specific engine code in manual for exact interval and potential for interference engine design).
        
     
    
    
        
            Engine Oil Capacity 1.8T:
        
        
            Approximately 4.5 liters (4.8 US quarts) with filter change.
        
     
    
        
            Engine Oil Viscosity:
        
        
            SAE 5W-40 or 5W-30, meeting VW 500 00, 502 00, or 505 00 specifications.
        
     
    
        
            Coolant Capacity:
        
        
            Approximately 6.0-7.0 liters (6.3-7.4 US quarts), depending on engine and transmission.
        
     
    
        
            Brake Fluid Type:
        
        
            DOT 4 (or DOT 4 LV for ABS systems).
        
     
    
    
        
            Ignition Coils:
        
        
            Coil-on-plug or coil pack failures can lead to misfires and rough running.
        
     
    
        
            Mass Air Flow Sensor:
        
        
            Can become dirty or fail, causing performance issues and check engine lights.
        
     
    
        
            ABS Wheel Speed Sensors:
        
        
            Failure can disable ABS and traction control, often indicated by warning lights.
        
     
    
        
            Suspension Components:
        
        
            Wear on control arm bushings, ball joints, and tie rod ends is common due to age and mileage.
        
     
    
        
            Climate Control Actuators:
        
        
            Faulty blend door or recirculation actuators can cause HVAC issues.
        
     
 
    
    
    
        
            Audi Legacy:
        
        
            Audi AG, a German luxury automobile manufacturer, known for its 'Vorsprung durch Technik' (Progress through Technology) motto and quattro all-wheel-drive system.
        
     
    
    
        
            B5 Generation Introduction:
        
        
            The B5 generation Audi A4 was introduced in 1994 (in Europe) and 1995 (in North America) as the successor to the Audi 80/90. It marked a significant step forward in design and technology for Audi.
        
     
    
        
            B5 Facelift:
        
        
            A facelift occurred for the 1998 model year (though some minor updates may have been introduced for 1997), typically including revised bumpers, headlights, and interior trim.
        
     
    
    
        
            Production Years:
        
        
            1994-2001 (Europe), 1995-2001 (North America).
        
     
    
    
        
            Manufacturing Plants:
        
        
            Ingolstadt, Germany; Brussels, Belgium.