Vehicle Segment:
Full-size Luxury Sedan
Target Audience:
Owners seeking to maintain or repair their 1998 Audi A8, DIY mechanics, professional workshops
Key Competitors 1998:
BMW 7 Series, Mercedes-Benz S-Class, Lexus LS
Manual Value Proposition:
Comprehensive coverage for DIY and professional repair, part ordering assistance
Download Convenience:
Instant digital download
Engine Systems:
Engine mechanical, fuel injection, ignition, cooling, lubrication, exhaust
Transmission Systems:
Automatic transmission (likely Tiptronic)
Chassis Systems:
Suspension (likely adaptive air suspension), steering, brakes, drivetrain
Electrical Systems:
Lighting, infotainment, comfort controls, engine management electronics, body control modules
Body Systems:
Body repair, interior trim, exterior panels, doors, windows, HVAC
Maintenance Procedures:
Scheduled maintenance, fluid changes, filter replacements, inspections
Repair Procedures:
Complete tear-down and rebuilds for major components
Troubleshooting Procedures:
Diagnostic flowcharts, symptom-based problem resolution
Special Procedures:
Torque specifications, calibration procedures
Depth Of Coverage:
Comprehensive, from basic maintenance to advanced diagnostics and component rebuilds
Visual Aids:
Abundant pictures and diagrams
Data Availability:
Torque specifications included
Engine Code Variants:
Likely ABZ (4.2L V8) and possibly ACK/ALG (2.8L V6)
Displacement Liters V8:
4.2
Valvetrain V8:
DOHC, 5 Valves per cylinder
Horsepower V8 Approx:
300 hp (220 kW)
Torque V8 Approx:
280 lb-ft (380 Nm)
Displacement Liters V6:
2.8
Valvetrain V6:
DOHC, 5 Valves per cylinder
Horsepower V6 Approx:
201 hp (148 kW)
Torque V6 Approx:
207 lb-ft (280 Nm)
Induction System:
Naturally Aspirated
Fuel Delivery:
Electronic Fuel Injection (MPI)
Recommended Fuel:
Premium Unleaded Gasoline (91+ Octane)
NHTSA Frontal Crash Rating:
Not rated or unavailable for this model year by NHTSA
Traction Control:
Standard (ASR/EDL)
Electronic Stability Control:
Likely ESP (Electronic Stability Program) available on some models
Airbags:
Driver and front passenger airbags, side airbags (likely optional)
Seatbelts:
Pre-tensioning front seatbelts
Infotainment System:
Audi Navigation System (RNS-D) with CD player, optional Bose premium sound system.
Driver Assistance Features:
Cruise control, parking sensors (likely optional), rain-sensing wipers (optional).
Connectivity Options:
Limited by era; primarily cellular phone integration (optional).
Oil Change Interval Km:
Approximately 15,000 km or 12 months (check manual for exact) - variable interval system (G12 coolant).
Timing Belt Replacement Km:
N/A (These engines used timing chains)
Engine Oil Type V8:
SAE 0W-30 or 5W-40, meeting VW 502.00/505.00 specification
Engine Oil Capacity V8 Liters:
Approximately 7.5 Liters
Transmission Fluid Type:
G 002 000 (ATF fluid)
Coolant Type:
G12 (Pink/Red Ethylene Glycol Antifreeze)
Common Issues Overview:
Suspension (air springs, shocks), ignition coils, ABS sensors, power window regulators, cooling system leaks (especially plastic components), electronic control module (ECU) failures, catalytic converter issues, transmission control module (TCM) faults.
Specific Issue 1:
Failure of the adaptive air suspension compressor or air springs leading to vehicle sag.
Specific Issue 2:
Degradation of coolant expansion tank and hoses leading to leaks.
Specific Issue 3:
Misfires due to failing ignition coils and spark plugs.
