2007 Audi S4

The 2007 Audi S4 is a performance-oriented sedan, wagon, and cabriolet known for its potent V8 engine, standard Quattro all-wheel drive, and refined interior. The S4 comes standard with a 4.2-liter V8 engine producing 340 horsepower and 302 lb-ft of torque. Transmission options include a 6-speed manual and a 6-speed Tiptronic automatic. Owners often praise the S4 for its engaging driving experience, confident handling in all weather conditions, and comfortable yet supportive seats. Common criticisms include the car’s relatively high running costs (due to premium fuel, maintenance, and potential repairs), and the complex nature of the vehicle can sometimes lead to expensive repairs if not properly maintained.

Engine

4.2L V8

• Timing Chain Tensioner Failure
  • Description/Symptoms: Rattling noise upon startup, especially when cold. Can eventually lead to catastrophic engine damage if the timing chain jumps.
  • Solution: Replace the timing chain tensioners, chains, and guides.
  • Estimated Cost to Fix: $3,000 - $6,000+
  • Recalls: None Found
• Oil Consumption
  • Description/Symptoms: Excessive oil consumption requiring frequent top-offs. Can lead to fouled spark plugs and catalytic converter issues.
  • Solution: In some cases, a valve seal replacement might help. In severe cases, engine rebuild or replacement.
  • Estimated Cost to Fix: $1,500 - $8,000+
  • Recalls: None Found
• Carbon Buildup
  • Description/Symptoms: Rough idle, hesitation upon acceleration, reduced fuel economy. Direct injection engines are prone to carbon buildup on the intake valves.
  • Solution: Manual cleaning of the intake valves (walnut blasting) or chemical cleaning.
  • Estimated Cost to Fix: $800 - $1,500+
  • Recalls: None Found
• Coolant Leaks
  • Description/Symptoms: Coolant loss, overheating. Common leak points include the coolant hoses and the coolant reservoir.
  • Solution: Replacing leaking hoses or reservoir.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Transmission

6-Speed Manual

• Clutch Failure
  • Description/Symptoms: Slipping clutch, difficulty shifting gears, clutch pedal feels spongy.
  • Solution: Clutch replacement.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

6-Speed Tiptronic Automatic

• Valve Body Issues
  • Description/Symptoms: Harsh or delayed shifting, slipping between gears, transmission warning light.
  • Solution: Replacing or rebuilding the valve body.
  • Estimated Cost to Fix: $1,500 - $4,000+
  • Recalls: None Found

Suspension

• Control Arm Bushing Failure
  • Description/Symptoms: Clunking noises from the suspension, especially over bumps. Poor handling and tire wear.
  • Solution: Replacing worn control arm bushings or the entire control arm.
  • Estimated Cost to Fix: $300 - $1,200+ per corner
  • Recalls: None Found
• Damper Failure
  • Description/Symptoms: Bouncy ride, poor handling, leaking fluid from the damper.
  • Solution: Damper Replacement.
  • Estimated Cost to Fix: $400 - $1,500+ per corner
  • Recalls: None Found

Electrical

• Window Regulator Failure
  • Description/Symptoms: Window not operating correctly, window falling into the door.
  • Solution: Window Regulator Replacement.
  • Estimated Cost to Fix: $300 - $600+ per window
  • Recalls: None Found
• Instrument Cluster Issues
  • Description/Symptoms: Pixelation or fading of the display, intermittent functionality.
  • Solution: Instrument cluster repair or replacement.
  • Estimated Cost to Fix: $300 - $1,000+
  • Recalls: None Found
• Oxygen (O2) Sensor Failure
  • Description/Symptoms: Check engine light, poor fuel economy, rough running engine.
  • Solution: Replacing the faulty O2 sensor.
  • Estimated Cost to Fix: $200 - $500+ per sensor
  • Recalls: None Found

Exterior

• Door Lock Actuator Failure
  • Description/Symptoms: Door not locking or unlocking properly.
  • Solution: Replacing the door lock actuator.
  • Estimated Cost to Fix: $200 - $500+ per door
  • Recalls: None Found

Interior

• No Issues Found

Summary

The 2007 Audi S4, while a rewarding vehicle to drive, can present owners with a number of potential issues. The most concerning are the timing chain issues, oil consumption, and carbon buildup on the 4.2L V8. These issues can lead to expensive repairs. Suspension and electrical components can also fail over time, adding to the overall cost of ownership. Buyers should have the car thoroughly inspected by a qualified mechanic before purchase and budget for potential repairs.