Timing Chain Tensioner Wear
high- Typically appears
- 60–100k mi
- Estimated repair
- $1,200 – $1,800
2007 Audi
A6 Sedan 3.2L V6 FSI (Engine Code: BKH)
3.2L V6 FSI
The 2007 Audi A6 3.2L V6 FSI is a mid-size European luxury sedan that sits squarely in the upper-midsize segment, competing with the BMW 5 Series and Mercedes-Benz E-Class. It pairs a naturally aspirated 3.2L FSI V6 (255 hp) with Audi's standard Quattro all-wheel drive — a genuine advantage in Wisconsin winters — and a sophisticated multi-link suspension that delivers a composed, planted ride. The interior quality and feature content were class-leading for 2007, and the standard Quattro system gives it credibility as a year-round daily driver in snow country. That said, this is a complex German luxury car now 17+ years old, and ownership costs reflect that. The BKH engine uses Fuel Stratified Injection (FSI), which means fuel is injected directly into the cylinder — great for efficiency and power, but the intake valves never get a fuel bath to wash off carbon deposits. Walnut blasting the intake valves is a real, recurring expense on high-mileage examples. Timing chain tensioner wear is also a documented issue on this engine family and should be high on any pre-purchase checklist. For the buyer who wants a sophisticated, all-weather luxury sedan and is prepared to use an independent shop familiar with VAG vehicles, a well-maintained A6 3.2 can still be deeply satisfying to drive. Budget accordingly, stay on top of oil changes, and inspect the timing chain system carefully before purchase.
Reliability
2/5
Engine
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Drivetrain
AWD
Fuel
Gasoline
MPG
18 city / 26 hwy / 21 combined
Seats
5
Doors
4
Body
Sedan
MSRP
$44,200
Overview
AI-curatedThe 2007 Audi A6 3.2L V6 FSI is a mid-size European luxury sedan that sits squarely in the upper-midsize segment, competing with the BMW 5 Series and Mercedes-Benz E-Class. It pairs a naturally aspirated 3.2L FSI V6 (255 hp) with Audi's standard Quattro all-wheel drive — a genuine advantage in Wisconsin winters — and a sophisticated multi-link suspension that delivers a composed, planted ride. The interior quality and feature content were class-leading for 2007, and the standard Quattro system gives it credibility as a year-round daily driver in snow country. That said, this is a complex German luxury car now 17+ years old, and ownership costs reflect that. The BKH engine uses Fuel Stratified Injection (FSI), which means fuel is injected directly into the cylinder — great for efficiency and power, but the intake valves never get a fuel bath to wash off carbon deposits. Walnut blasting the intake valves is a real, recurring expense on high-mileage examples. Timing chain tensioner wear is also a documented issue on this engine family and should be high on any pre-purchase checklist. For the buyer who wants a sophisticated, all-weather luxury sedan and is prepared to use an independent shop familiar with VAG vehicles, a well-maintained A6 3.2 can still be deeply satisfying to drive. Budget accordingly, stay on top of oil changes, and inspect the timing chain system carefully before purchase.
Known for
- Standard Quattro AWD — one of the best AWD systems in its class
- Smooth, refined 3.2L FSI V6 with strong mid-range pull
- High-quality interior with premium materials
- Composed, European-tuned ride and handling balance
- Feature-rich technology and comfort equipment for its era
Best for
- Year-round Wisconsin commuters who want AWD with luxury refinement
- Buyers comfortable with European independent shop maintenance
- Drivers who prioritize a composed, premium driving experience
- Those seeking a used luxury sedan with genuine AWD capability
Watch for
- Carbon buildup on intake valves — a recurring FSI engine issue
- Timing chain tensioner wear starting around 60–100k miles
- High dealer repair costs — an independent VAG specialist is essential
- Aging electronics and sensors driving up diagnostic costs on high-mileage cars
- Coolant system components (water pump, thermostat) are wear items by 60–90k
Common issues by mileage
6 knownCarbon Buildup on Intake Valves (FSI Direct Injection)
high- Typically appears
- 70–120k mi
- Estimated repair
- $450 – $750
Coolant Leaks — Water Pump and Thermostat Housing
medium- Typically appears
- 60–90k mi
- Estimated repair
- $300 – $500
Fuel Pump Failure (High-Pressure In-Tank Pump)
medium- Typically appears
- 80–110k mi
- Estimated repair
- $650 – $950
Random/Multiple Cylinder Misfire
medium- Typically appears
- 75–100k mi
- Estimated repair
- $200 – $500
Catalytic Converter Degradation
medium- Typically appears
- 90–130k mi
- Estimated repair
- $800 – $1,400
Maintenance schedule
- 1 Every 5,000 miles or 6 months Oil Change with VW/Audi-spec full synthetic (VW 502.00)
The BKH FSI engine is sensitive to oil quality and level. Low oil pressure accelerates timing chain tensioner wear. Do not stretch to OEM's longer oil-life intervals on a high-mileage car.
- 2 At 60k miles, then every 30k miles thereafter Timing Chain and Tensioner Inspection
Tensioner wear can allow chain slack, leading to camshaft timing codes and potential engine damage. Catching this early is far cheaper than a full chain replacement under pressure.
- 3 Every 50–60k miles Intake Valve Carbon Cleaning (Walnut Blasting)
FSI direct injection bypasses the intake valves, so carbon from oil blow-by accumulates there unimpeded. Heavy buildup causes rough idle, misfires, and power loss.
- 4 Every 45,000 miles Spark Plug Replacement
Worn plugs on the FSI engine can cause misfires and accelerate carbon buildup. Use OEM-spec iridium plugs.
- 5 Every 30,000 miles or 3 years Coolant System Service (flush + thermostat and water pump inspection)
The plastic thermostat housing and water pump are documented failure points. Inspect both whenever the coolant is serviced. Replacing them together saves labor cost.
- 6 Every 2 years regardless of mileage Brake Fluid Flush
Audi specifies a 2-year brake fluid interval. DOT 4 fluid absorbs moisture over time, lowering boiling point — critical for a car this weight on Wisconsin hills in winter.
- 7 Every 7,500 miles Tire Rotation
Quattro AWD distributes load to all four tires, but front tires still wear faster under steering load. Even wear across all four protects the AWD center differential.
- 8 Every 30,000 miles Air Filter Replacement
A restricted air filter on an FSI engine worsens fuel trims and can trigger lean codes (P0171). Wisconsin road grit and dust make this interval non-negotiable.
Always defer to the manufacturer's service manual for warranty-mandated intervals.
Cost of ownership
Annual maintenance
$900 – $2,000
Fuel
Premium unleaded (91 octane) required. At 21 MPG combined and Wisconsin average driving, expect roughly $2,200–$2,800/year in fuel costs.
Insurance
Expect mid-to-upper tier insurance premiums for a luxury sport sedan — typically $1,400–$2,000/year for a driver with a clean record in the Lake Geneva area.
A 2007 A6 3.2 in good shape costs relatively little in routine maintenance year-to-year, but repair events when they happen are expensive. Budget $900–$2,000 for normal annual upkeep (oils, filters, brakes, tires). Set aside an additional $1,000–$2,500 contingency fund for the timing chain and carbon cleaning services that will be needed on any example that hasn't had them done. This is not a cheap car to own — it just doesn't always announce its costs in advance.
Seasonal care
Lake Geneva, WI Winter
- Quattro AWD is a genuine asset in Wisconsin winters, but match it with proper winter tires — AWD does not improve stopping distance on ice.
- Battery check every fall: cold cranking amps drop sharply below 0°F, and the A6's electronics draw significant standby current. Replace any battery over 4–5 years old proactively.
- Use a full-synthetic oil meeting VW 502.00 spec — it flows better at sub-zero temps and protects the timing chain tensioner on cold starts, which is when most wear occurs.
- Switch to a winter-rated washer fluid (rated to at least -20°F) before November; the A6's flat hood and low cowl let road spray hit the windshield hard.
- Inspect the undercarriage and wheel wells for salt accumulation after wet-snow events — the A6's aluminum and steel mixed structure handles salt reasonably well but brake lines and suspension components benefit from a rinse.
- Check tire pressure weekly in deep cold — pressures drop roughly 1 PSI for every 10°F drop in temperature, and the TPMS may not alert until you're already at unsafe levels.
Summer
- Inspect and service the A/C system if it hasn't been done recently — the A6's climate control is complex and a weak compressor or low refrigerant is noticeable fast in a humid Wisconsin July.
- Check tire pressure after temperature spikes — pressures rise with heat and an overinflated tire on hot pavement reduces contact patch and ride quality.
- Monitor coolant temperature carefully: the thermostat and water pump are known weak points, and summer heat will surface a marginal cooling system faster than winter will.
- Inspect serpentine belt and tensioner — summer heat accelerates rubber degradation, and a snapped belt leaves you stranded with no power steering or charging.
- After winter, inspect brake rotors for surface rust and uneven wear — Wisconsin road salt can cause rotors to corrode unevenly when a car sits, leading to vibration under braking.
Comparable vehicles
2007 BMW
5 Series 528xi
Direct competitor — xDrive AWD, similar luxury level and price point, also a mid-size European luxury sedan. The N52 engine in the 528xi has a better carbon-buildup reputation than the FSI, though electronics costs are similarly high.
2007 Mercedes-Benz
E350 4MATIC
Same segment and AWD capability. The 3.5L V6 in the E350 has a strong reliability record and the 4MATIC system is proven. Repair costs at the dealer are high, but independent MB shops are common and parts availability is excellent.
No catalog match
2007 Volvo
S80 AWD
Lower entry price used, standard AWD, strong safety reputation — a more affordable European luxury alternative with lower repair cost ceilings and excellent winter capability.
2007 Lexus
GS 350 AWD
If reliability is the top priority, the GS 350 AWD offers near-equal luxury and performance with substantially lower long-term repair costs and a far simpler engine. Fewer Wisconsin independent shops specialize in it, but it rarely needs them.