2009 Audi S4

Introduction: The 2009 Audi S4 is a mid-size, high-performance sedan powered by a supercharged 3.0-liter V6 engine producing 333 horsepower and 325 lb-ft of torque. Paired with a 6-speed manual or a 6-speed automatic transmission, it delivers exceptional driving dynamics and impressive acceleration. While the S4 is renowned for its thrilling performance and luxurious interior, it has experienced some issues that are worth noting.

Engine

• Fuel Pump Failure
  • Description/Symptoms: Intermittent or complete loss of engine power, difficulty starting, stalling
  • Solution: Replace the fuel pump
  • Estimated Cost to Fix: $600 - $1,000+
  • Recalls: NHTSA Campaign Number: 09V326000

Transmission

• 6-Speed Manual Transmission
  • Shifting Difficulty
    • Description/Symptoms: Notchy or difficult gear shifts, grinding noises during gear engagement
    • Solution: Lubricate or replace shift linkage components
    • Estimated Cost to Fix: $150 - $400
• 6-Speed Automatic Transmission
  • Torque Converter Shudder
    • Description/Symptoms: Vibrations or shuddering during acceleration
    • Solution: Replace the torque converter or rebuild the transmission
    • Estimated Cost to Fix: $2,000 - $4,000+
  • Mechatronic Unit Failure
    • Description/Symptoms: Transmission slipping, delayed gear shifts, loss of power
    • Solution: Replace the mechatronic unit
    • Estimated Cost to Fix: $2,500 - $3,500+
  • Recalls: NHTSA Campaign Number: 10V437000

Suspension

• Front Shock Absorber Failure
  • Description/Symptoms: Leaking fluid, excessive body roll, bouncy ride
  • Solution: Replace the front shock absorbers
  • Estimated Cost to Fix: $400 - $800

Electrical

• Electrical Control Module (ECM) Failure
  • Description/Symptoms: Difficulty starting, engine stalling, check engine light illumination
  • Solution: Replace the ECM
  • Estimated Cost to Fix: $1,000 - $1,500+
• Multi-Function Display (MFD) Malfunction
  • Description/Symptoms: Screen flickering, loss of functionality, distorted displays
  • Solution: Software update or MFD replacement
  • Estimated Cost to Fix: $300 - $600

Exterior

• Headlight Condensation
  • Description/Symptoms: Moisture buildup inside the headlight assemblies
  • Solution: Replace the headlight assemblies or install condensation vents
  • Estimated Cost to Fix: $500 - $1,000+

Interior

• Sunroof Panel Seal Leakage
  • Description/Symptoms: Water leaking into the cabin through the sunroof
  • Solution: Replace the sunroof panel seal
  • Estimated Cost to Fix: $200 - $400

Summary

The 2009 Audi S4 is a capable and exciting performance sedan, but it has experienced several issues that can affect its reliability. From fuel pump failures to transmission problems and electrical malfunctions, owners may encounter significant repair costs. However, the severity and frequency of these issues vary, and not all vehicles will experience them. It’s important to note that regular maintenance and proper driving habits can help mitigate some potential problems.