Buying a used Audi S5 B8: our reliability guide
The Audi S5 B8 represents one of the finest balances of elegance, sportiness, and refinement in the Audi range. Produced between 2007 and 2016, it was available as a coupé, cabriolet, and Sportback. This generation is distinguished by a mix of engines : a naturally aspirated V8 in the early models, then a supercharged 3.0 TFSI V6 from the facelift onward. This guide will help you understand the differences between these versions, their strengths, weaknesses, and maintenance costs.
Available engines: Supercharged V8 or V6
The Audi S5 B8 had two main engine options depending on the body style and year of production:
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V8 4.2 FSI naturally aspirated (engine code CAUA): fitted to the coupe between 2007 and 2011.
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V6 3.0 TFSI with mechanical supercharger (engine code CCBA then CREC after facelift): adopted on the convertible from 2009, then on all versions (coupe, convertible, Sportback) from 2012.
The V8 is a noble, powerful and musical engine, offering 354 horsepower and 440 Nm of torque. However, it is less fuel-efficient (around 12 to 14 L/100 km) and slightly heavier at the front.
The supercharged V6, meanwhile, delivers 333 horsepower but is significantly more responsive and flexible thanks to its torque available from low revs. It allows the S5 to accelerate from 0 to 100 km/h in approximately 5 seconds while also consuming less fuel.
A high-potential engine: up to 400 horsepower without mechanical modification
The 3.0 TFSI V6 is renowned for its robustness and impressive potential for development. Thanks to its Eaton supercharger and well-designed architecture, it easily handles a Stage 1 engine remap .
This simple electronic optimization makes it possible to reach approximately 400 horsepower and more than 500 Nm of torque , without any mechanical modification, while maintaining exemplary reliability if maintenance is rigorous and temperatures are controlled.
The gains are immediate: crisper acceleration, more powerful pickup, while retaining the original comfort and driving smoothness.
Some enthusiasts go even further with a supercharger pulley change (stage 2), which allows them to approach 430 horsepower. This type of modification remains reliable if the engine mapping is properly adjusted and the cooling system is improved.
Transmissions: manual, Tiptronic or S tronic
Three types of transmissions were offered depending on the version:
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6-speed manual gearbox : available on the V8 coupe and the supercharged V6, rare but very pleasant for purists.
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6-speed Tiptronic automatic transmission : only on the 4.2 V8, it is a classic torque converter transmission, smooth but less fast.
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S tronic dual-clutch gearbox (7 speeds) : installed on the S5 3.0 TFSI, it combines comfort and responsiveness, provided that rigorous maintenance is carried out.
The S tronic transmission (DL501) requires an oil change every 60,000 km, including filter replacement. If this is neglected, the driver may experience jerking or a loss of traction.
The Tiptronic, on the other hand, is virtually indestructible, but it does slightly penalize performance.
Transmission and road handling
Like all Audi S models, the S5 relies on the permanent quattro system, guaranteeing flawless traction, even on wet roads.
Starting with the facelift (B8.5, in 2012), Audi introduced a more responsive crown center differential capable of sending up to 70% of the torque to the rear, enhancing dynamism.
As an option, the S5 could be equipped with an active rear differential (sport differential) , capable of accelerating the outside wheel in corners to compensate for the natural understeer of Audis. This is a highly recommended option for those seeking a more playful and balanced driving experience.
On the road, the S5 impresses with its high-speed stability , powerful braking, and precise chassis.
The five-link front suspension and multi-link rear suspension provide an excellent compromise between comfort and road holding, even on rough roads.
Reliability of the 4.2 FSI V8
The naturally aspirated V8 in the first S5 is generally robust, but there are a few points to watch out for:
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Timing chains at the rear of the engine : they are difficult to access and labor is expensive. The tensioners can fail around 180,000 km.
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Oil consumption : common on FSI blocks, not serious if the level is monitored regularly.
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Direct injectors : sensitive to carbon buildup, carbon cleaning every 100,000 km is recommended.
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Exhaust manifolds : can crack over time.
This engine remains a mechanical marvel, very linear, but its maintenance is more expensive. It is aimed more at enthusiasts seeking a pure sonic and mechanical experience .
Reliability of the V6 3.0 TFSI
This engine, which powers most S5s from 2009 onwards (and all after 2012), is very reliable, provided it is properly maintained. The main points to watch out for are:
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Water pump and thermostat : often prone to leaks. Replacement recommended around 100,000 km.
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Timing chain tensioner : a few cases of noise when cold on the early models.
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Heat exchanger : possibility of internal leaks between the oil and the coolant.
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Compressor cooling system : ensure the circuit is kept clean and purged to prevent overheating.
Apart from these details, the V6 TFSI proves to be extremely durable. Examples exceeding 300,000 km without major problems are not uncommon.
Maintenance and operating costs
The maintenance costs of an S5 B8 remain reasonable for a car of this performance level, but higher than a classic A5.
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Engine oil change : every 10,000 to 15,000 km, with 5W30 VW 504.00 oil.
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Spark plugs and coils : every 60,000 km.
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Coolant : every 4 years.
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Gearbox (S tronic or Tiptronic) : oil change every 60,000 km.
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Brakes : front discs 345 mm, pads approximately €250 to €300.
The front tires wear out quickly, especially with spirited driving. A set of high-performance tires costs around €800 to €1000.
Interior and equipment
The S5 offers a luxurious and timeless interior , typically Audi. Meticulous finish, high-end materials, supportive sports seats and specific "S" instrumentation.
Depending on the version and options, you can find:
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Bang & Olufsen audio system
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Leather or leather/alcantara seats
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MMI GPS with hard drive
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Panoramic sunroof
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Electronically controlled suspension
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Flat-bottomed steering wheel (B8.5)
The 2012 facelift (S5 B8.5) brought a modernized interior, a new steering wheel, more intuitive controls and an improved multimedia system with Bluetooth audio playback.
Aesthetics and design
The Audi S5 B8 continues to impress with its timeless design. The facelifted version (B8.5) introduces redesigned LED headlights, slimmer taillights, and a more angular grille.
Versions equipped with the Black Optic package replace the chrome elements (grille surround, roof bars, mirror caps) with glossy black finishes, reinforcing the sporty look.
Second-hand market and valuation
In 2025, the S5 B8 market is distributed as follows:
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S5 V8 4.2 FSI (2007-2011) : between €14,000 and €20,000 depending on mileage and maintenance.
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S5 V6 3.0 TFSI (2012-2016) : between €22,000 and €30,000 for a good example.
Manual gearboxes are rare and sought after, while convertible versions sell a little less quickly, due to their greater weight.
A complete history, particularly regarding the gearbox and distribution, is essential before purchase.
Accessories and performance parts for Audi S5 B8
We offer a selection of accessories and performance parts specifically designed for the Audi S5 B8.
Enhance the comfort and style of your vehicle with our CarPlay modules:
Our spoilers , interior trim, and replacement buttons to restore your car's interior or carbon fiber mirror housings:
All our products are compatible, tested and guaranteed for 1 year, with free delivery.
In summary: which S5 should you choose?
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If you're an enthusiast looking for a pure mechanical experience and exceptional sound , opt for the 4.2 FSI V8 . It demands more attention, but offers a unique character.
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If you're looking for the ideal balance of performance, reliability, and fuel economy , the S5 V6 3.0 TFSI is the best choice. This engine is lighter, more modern, and easily optimized.
In any case, the Audi S5 B8 remains a reliable and rewarding fun car , capable of everyday use as well as exhilarating driving moments.
