2006 Audi S4
2006 Audi S4
Overview
The 2006 Audi S4, a performance-oriented variant of the A4, is known for its potent V8 engine and engaging driving dynamics. However, like many high-performance vehicles of its era, it can present specific reliability challenges that owners should be aware of. This data focuses on common mechanical and electrical issues reported by owners and technicians, excluding routine maintenance. Understanding these potential problem areas can help prospective buyers and current owners budget for and address necessary repairs, ensuring the continued enjoyment of this enthusiast-focused sedan.
Engine
4.2L V8 (Naturally Aspirated)
Timing Chain Tensioner Failure
- Symptoms: Rattling noise from the rear of the engine, especially on startup; check engine light; potential for catastrophic engine damage if ignored.
- Solution: Replacement of timing chain tensioners, guides, and potentially the chains themselves. This is a labor-intensive job.
- Cost: $2500 - $4500
Oil Leaks (Valve Cover Gaskets, Oil Cooler Seals)
- Symptoms: Visible oil leaks under the hood, burning oil smell, low oil level.
- Solution: Replacement of affected gaskets and seals.
- Cost: $400 - $800
PCV System Clogs
- Symptoms: Rough idle, increased oil consumption, potential for oil leaks.
- Solution: Replacement of the Positive Crankcase Ventilation (PCV) valve and associated hoses.
- Cost: $200 - $500
Transmission
6-Speed Manual
Clutch Wear
- Symptoms: Slipping clutch, difficulty shifting gears, burning smell.
- Solution: Clutch kit replacement (clutch disc, pressure plate, release bearing).
- Cost: $800 - $1500
6-Speed Automatic (Tiptronic)
Torque Converter Issues
- Symptoms: Shuddering during acceleration, slipping gears, harsh shifting.
- Solution: Rebuild or replacement of the torque converter and potentially the transmission.
- Cost: $1500 - $3000
Valve Body Problems
- Symptoms: Erratic shifting, transmission not engaging gears properly.
- Solution: Repair or replacement of the transmission valve body.
- Cost: $800 - $1800
Suspension
Standard Chassis
Control Arm Bushing Wear
- Symptoms: Clunking noises over bumps, vague steering feel, uneven tire wear.
- Solution: Replacement of worn control arm bushings or the entire control arm assembly.
- Cost: $400 - $700
Shock/Strut Leaks
- Symptoms: Bouncy ride, visible fluid leaks on shock absorbers.
- Solution: Replacement of worn shocks or struts.
- Cost: $500 - $900
Electrical
General Electrical System
Window Regulator Failure
- Symptoms: Power windows not operating, window getting stuck.
- Solution: Replacement of the window regulator mechanism.
- Cost: $200 - $400
HVAC Blower Motor Resistor Failure
- Symptoms: HVAC fan only works on highest setting or not at all.
- Solution: Replacement of the blower motor resistor.
- Cost: $100 - $250
Infotainment System Glitches
- Symptoms: Screen freezing, navigation issues, audio problems.
- Solution: Software updates or replacement of head unit components.
- Cost: $300 - $800
Exterior
Body Panels and Trim
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Interior
Cabin Components
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Summary Verdict
The 2006 Audi S4 offers exhilarating performance but comes with potential reliability concerns, primarily centered around its complex V8 engine, particularly the timing chain system. Transmission issues, especially with the automatic, can also be costly. Suspension components like control arm bushings are prone to wear. Electrical gremlins, such as window regulators and infotainment glitches, are not uncommon. While the exterior and interior are generally robust, owners should be prepared for significant repair costs associated with the engine and transmission. Regular maintenance and prompt attention to early warning signs are crucial for mitigating these issues.