2014 Audi S4

The 2014 Audi S4 is a performance-oriented sedan known for its supercharged V6 engine, sporty handling, and luxurious interior. It came standard with a 3.0-liter supercharged V6 engine producing 333 horsepower and 325 lb-ft of torque. Transmission options included a 6-speed manual and a 7-speed S-tronic dual-clutch automatic. Owners often praise the S4 for its engaging driving experience, comfortable seats, and attractive styling. Common complaints include higher maintenance costs compared to some competitors, occasional electrical glitches, and the potential for expensive repairs due to the complexity of the supercharged engine and dual-clutch transmission.

Engine

3.0L Supercharged V6

• Thermostat Housing Leaks
  • Description/Symptoms: Coolant leaks often develop around the thermostat housing. Visible coolant drips, low coolant levels, and engine overheating are common symptoms.
  • Solution: Replacement of the thermostat housing, often including a new thermostat and coolant flush.
  • Estimated Cost to Fix: $300 - $700+
  • Recalls: None Found
• Supercharger Failure
  • Description/Symptoms: Reduced power, whining noise from the engine, and potential engine misfires. The supercharger pulley bearing is a common failure point.
  • Solution: Supercharger replacement or rebuild. A rebuild often involves replacing the supercharger pulley bearing and inspecting/replacing other wear components.
  • Estimated Cost to Fix: $2,000 - $4,000+ Recalls: None Found
• PCV Valve Failure
  • Description/Symptoms: Rough idle, oil leaks, check engine light illumination (often related to lean running conditions).
  • Solution: PCV valve replacement.
  • Estimated Cost to Fix: $200 - $500
  • Recalls: None Found
• Carbon Buildup
  • Description/Symptoms: Rough idle, decreased performance, poor fuel economy, and eventual check engine light. The direct injection system on the 3.0T can cause carbon to build up on the intake valves.
  • Solution: Manual cleaning of the intake valves (walnut blasting is a common method).
  • Estimated Cost to Fix: $500 - $1,000+ Recalls: None Found

Transmission

7-Speed S-Tronic Dual-Clutch Transmission

• Mechatronic Unit Failure
  • Description/Symptoms: Harsh or jerky shifting, failure to shift, transmission warning lights, and potential complete loss of drive.
  • Solution: Mechatronic unit replacement or rebuild. Some shops can repair the unit, while others recommend complete replacement.
  • Estimated Cost to Fix: $2,000 - $5,000+
  • Recalls: None Found
• Clutch Pack Failure
  • Description/Symptoms: Slipping during acceleration, harsh engagement, and unusual noises during shifting.
  • Solution: Clutch pack replacement.
  • Estimated Cost to Fix: $2,500 - $4,500+
  • Recalls: None Found

Suspension

• Control Arm Bushing Failure
  • Description/Symptoms: Clunking noises from the suspension, especially over bumps. Imprecise handling and uneven tire wear.
  • Solution: Control arm replacement (often the bushings are not sold separately).
  • Estimated Cost to Fix: $300 - $800+ per arm (depending on which arm and labor costs)
  • Recalls: None Found

Electrical

• Power Window Regulator Failure
  • Description/Symptoms: Window not operating, slow or erratic window movement, clicking noises from the door.
  • Solution: Power window regulator replacement.
  • Estimated Cost to Fix: $250 - $500 per window
  • Recalls: None Found
• Navigation/MMI System Issues
  • Description/Symptoms: System freezing, slow response, screen flickering, and complete system failure.
  • Solution: Software updates, MMI unit reset, or replacement of the MMI control unit.
  • Estimated Cost to Fix: $100 - $1,500+ (depending on the severity and repair needed)
  • Recalls: None Found

Exterior

• Sunroof Issues
  • Description/Symptoms: Sunroof not opening or closing properly, unusual noises during operation, water leaks.
  • Solution: Sunroof track cleaning and lubrication, replacement of the sunroof motor or other components.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Interior

• Seat Heater Failure
  • Description/Symptoms: Seat heater not warming up, inconsistent heating, or complete failure.
  • Solution: Replacement of the seat heating element or control module.
  • Estimated Cost to Fix: $300 - $800 per seat
  • Recalls: None Found

Summary

The 2014 Audi S4, while offering a thrilling driving experience, can present owners with several potential issues. Engine problems like thermostat housing leaks, supercharger problems, and carbon buildup are common and can lead to costly repairs. The S-Tronic transmission, while quick and responsive, is also prone to issues with the mechatronic unit and clutch packs, resulting in expensive repair bills. Suspension and electrical issues further contribute to the ownership costs. While not all S4s will experience all these problems, potential buyers should be aware of these common issues and factor them into their purchasing decision. Overall, the severity of these issues ranges from minor annoyances to major mechanical failures, with repair costs ranging from a few hundred dollars to several thousand depending on the problem.