2003 Audi S8 Problems & Reliability

If you’re a car enthusiast or just someone who appreciates the finer things in life, the 2003 Audi S8 might have caught your eye at some point. This luxury sedan, with its sleek design and powerful V8 engine, was a head-turner in its heyday and still holds a certain allure today. However, like any vehicle that’s been around for a couple of decades, the 2003 Audi S8 has its share of quirks and issues that potential buyers or current owners should be aware of. In this blog post, we’ll dive into some of the common problems associated with this model and discuss its overall reliability, helping you make an informed decision if you’re considering adding this classic to your garage. While the 2003 Audi S8 is known for its impressive performance and luxurious features, it’s not without its challenges. From electrical gremlins to suspension woes, this car has a few notorious trouble spots that have been reported by owners over the years. But don’t let that scare you off just yet! We’ll also explore how these issues stack up against the car’s overall reliability and longevity. Whether you’re a die-hard Audi fan or just curious about this iconic model, stick around as we uncover the good, the bad, and the quirky aspects of the 2003 Audi S8.
Body Components

Parts Assessed:

Windows, power locks, manual locks, doors, trunk, tailgate, mirrors, power and manual seat controls, seat belts, sunroof, convertible top, glass defects.

Reported Problems:

N/A

Analysis:

No major problem has been reported

Parts Assessed

Brake pads, brake rotors, brake calipers, anti-lock braking system (ABS), brake lines, brake master cylinder, brake booster, parking brake, brake sensors, regenerative braking system (if applicable).

Reported Problems:

  • Rainwater May Accumulate in Plenum Tray Due to Clogged Drains

Analysis:

The 2003 Audi S8 has a known issue where rainwater can accumulate in the plenum tray due to clogged drains. This problem can lead to water damage if not addressed promptly, affecting the car’s overall reliability. Regular maintenance to ensure the drains are clear can help prevent this issue and keep your S8 running smoothly.

Parts Assessed

Air conditioning compressor, AC condenser, AC evaporator, heater core, blower motor, automatic climate control system, refrigerant leaks, HVAC electrical components, temperature sensors, ventilation system.

Reported Problems:

  • Oil Leak From Transmission Output Shaft Seal

Analysis:

The 2003 Audi S8 is known for its performance, but one common issue that pops up is the oil leak from the transmission output shaft seal. This problem can lead to decreased reliability if not addressed promptly, as it might cause further damage to the transmission over time. Regular maintenance and timely repairs are key to keeping this classic ride running smoothly.

Parts Assessed

CV joints, driveshaft, axles, differential, limited-slip differential (if applicable), traction control system, electronic stability control (ESC), four-wheel-drive (4WD) components, all-wheel-drive (AWD) components, transfer case, driveline vibration.

Reported Problems:

  • Overheating Due to Failing Thermostat

Analysis:

The 2003 Audi S8 is known to have some issues with overheating, often due to a failing thermostat. This problem can lead to engine performance issues if not addressed promptly. While the car is generally reliable, it’s important for owners to keep an eye on the cooling system to avoid potential overheating problems.

Parts Assessed

Infotainment system, GPS navigation, Bluetooth connectivity, touchscreen display, phone pairing, backup camera, rear entertainment system, head-up display, instrument cluster, digital gauges.

Reported Problems:

  • Premature Wear in Multi-Link Suspension Components May Cause Noise

Analysis:

The 2003 Audi S8 is a solid performer, but one issue to keep an eye on is the premature wear in its multi-link suspension components, which can lead to some annoying noise. While this doesn’t necessarily spell disaster for the car’s overall reliability, it’s something that owners might want to address sooner rather than later to maintain a smooth and quiet ride. Overall, the S8 is a reliable vehicle, but like any car, it has its quirks that need attention.

Parts Assessed

Radiator, radiator hoses, cooling fan, water pump, thermostat, antifreeze leaks, engine coolant reservoir, overheating prevention system, intercooler (if applicable).

Reported Problems:

  • Inspect CV Boots and Joints at Each Service

Analysis:

The 2003 Audi S8 is known for its solid performance, but like any older vehicle, it can have its quirks. One area to keep an eye on is the CV boots and joints, which should be inspected at each service. Regular checks can help prevent bigger issues down the line, ensuring your ride stays smooth and reliable.

Parts Assessed

Alternator, battery, ignition switch, ignition coil, spark plugs, ignition wires, engine control module (ECM), electronic ignition system, auto stop/start function, battery cables, engine wiring harness, fuse box, relays, starter motor.

Reported Problems:

  • Check Engine Light Due to Faulty Torque Converter

Analysis:

The 2003 Audi S8 is known to have some issues with the check engine light coming on due to a faulty torque converter. This problem can be a bit of a headache, as it might lead to transmission issues if not addressed promptly. Overall, while the S8 is a solid performer, this particular issue can affect its reliability if left unchecked.

Parts Assessed

Engine rebuilds, cylinder head, head gasket, timing chain, timing belt, camshaft, crankshaft, connecting rods, turbocharger or supercharger (if applicable), valve train, piston rings, oil control system, engine knocking, engine misfires.

Reported Problems:

  • No Start after Refueling and Popping Noise from Trunk

Analysis:

The 2003 Audi S8 seems to have a couple of quirks that might be a bit annoying. Some owners have reported issues with the car not starting after refueling, which could be a hassle if you’re in a hurry. Additionally, there’s a popping noise coming from the trunk that might be more of an irritation than a serious problem, but it’s something to keep in mind if you’re considering this model.

Parts Assessed

Muffler, catalytic converter, exhaust manifold, heat shields, exhaust pipes, oxygen (O₂) sensors, resonator, exhaust leaks, emissions control system.

Reported Problems:

N/A

Analysis:

No major problem has been reported

Parts Assessed

Fuel pump, fuel injectors, fuel rail, fuel pressure regulator, throttle body, fuel gauge sensor, evaporative emissions system, EGR (exhaust gas recirculation) valve, charcoal canister, fuel filter, fuel tank, vapor leaks.

Reported Problems:

N/A

Analysis:

No major problem has been reported

Flagship-One-Engine-Computer-In-Stock
Onboard Electronics

Parts Assessed

Cruise control, keyless entry system, push-button start, wiper motor, warning lights, power mirrors, interior lighting, exterior lighting, dashboard indicators, electronic parking brake, tire pressure monitoring system (TPMS), alarm and security system, remote engine start, heated and ventilated seats, heated steering wheel, wireless charging pad.

Reported Problems:

N/A

Analysis:

No major problem has been reported

Parts Assessed

Dashboard rattles, squeaks, wind noise, door seals, weather stripping, water leaks, air leaks, excessive road noise, suspension noise, drivetrain noise, exhaust rattles, engine bay noises.

Reported Problems:

N/A

Analysis:

No major problem has been reported

Parts Assessed

Paint durability, clear coat protection, rust prevention, corrosion resistance, body panel alignment, door seals, window trim, plastic trim, metal finishes, fading, cracking, peeling.

Reported Problems:

N/A

Analysis:

No major problem has been reported

Parts Assessed

Struts, shocks, control arms, sway bars, ball joints, tie rods, wheel bearings, power steering pump, power steering fluid leaks, electronic power steering (EPS), steering rack and pinion, steering linkage, alignment issues, torsion bars, springs, air suspension (if applicable).

Reported Problems:

N/A

Analysis:

No major problem has been reported

Parts Assessed

Transmission rebuild, transmission replacement, torque converter, transmission solenoids, gear selector, gear shifting, transmission control module (TCM), transmission fluid leaks, clutch (manual transmission), automatic transmission valve body, CVT (continuously variable transmission) components, dual-clutch transmission (DCT) components.

Reported Problems:

N/A

Analysis:

No major problem has been reported

Conclusion

Facebook
Twitter
LinkedIn
Picture of Flagship One

Flagship One

The world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules.

What Customers Think About Us