Considering a pre-facelift Audi S5 with the 4.2 V8 engine? You’re in for a treat. Many enthusiasts are drawn to this model for its blend of performance and value, especially compared to later, more expensive versions. If you’re looking at a 2010 Audi S5, understanding the engine – specifically its reliability and any potential issues – is crucial. Having owned a 2009 model and driven it past the 60,000-mile mark (approximately 100,000 kilometers), I can share some insights into what to expect from this robust power plant.
The Renowned 4.2 V8: A Heart of Strength
The 4.2 V8 engine in the 2010 Audi S5 is generally regarded as a very dependable engine. Anecdotal evidence and owner experiences suggest that major mechanical failures are not common, contributing to its reputation as a “bulletproof” engine. My own experience strongly supports this. Despite the odometer reading climbing well into six figures, my S5’s engine has performed flawlessly since I acquired it.
However, like any car, especially one with some years under its belt, there are maintenance items and potential issues that prospective owners should be aware of. Interestingly, my car had its engine replaced before I even purchased it, but this wasn’t due to inherent engine failure.
Intake Manifold Issue: A Manufacturing Defect, Not Engine Weakness
The engine replacement in my S5 was attributed to a known issue with a batch of intake manifolds produced by Audi. These manifolds unfortunately suffered from perforations. During diagnostics, the decision was made to replace the entire engine rather than just the manifold. It’s important to emphasize that this was a problem with a component attached to the engine, not a fundamental flaw within the 4.2 V8 itself. Therefore, if you are considering a 2010 Audi S5, it is highly likely that this intake manifold issue has either been addressed or is not present in the vehicle you are inspecting.
Common Maintenance and Wear Items
Beyond the intake manifold anomaly, there are a few more typical maintenance items and wear points to consider for a 2010 Audi S5:
Carbon Cleaning: A Direct Injection Reality
Like many direct injection engines, carbon buildup on the intake valves is a known phenomenon for the 4.2 V8. This is a routine maintenance item, especially as mileage accumulates. A carbon clean service, which involves removing this buildup, can restore optimal engine performance and efficiency. I recently had this service performed on my S5 as preventative maintenance, and it’s a relatively straightforward procedure for qualified mechanics.
Suspension Bushings: Age-Related Wear
Suspension bushings are another area that may require attention in an older Audi S5. While not necessarily a rapid wear item, bushings can develop hairline cracks over time, impacting ride quality and handling. In my case, some hairline cracks were identified in my suspension bushings. Fortunately, this was addressed under the Audi Freeway plan warranty at the time. When inspecting a 2010 S5, it’s worth having the suspension bushings checked for any signs of wear or deterioration.
Front Lower Control Arms: An Improved Design
Early production models of the S5 experienced issues with front lower control arms that were not robust enough for the weight of the V8 engine. However, by the 2010 model year, and certainly for 2011 onwards, Audi had addressed this. Either these control arms would have already been replaced on a 2010 model, or the factory would have incorporated the beefier, improved design. It’s still a good idea to check the condition of the control arms during a pre-purchase inspection, but this is less likely to be a major concern on a 2010 vehicle.
Servicing and Expertise: Independent Shops are Abundant
One of the advantages of owning a slightly older Audi like the 2010 S5 is the increasing availability of independent repair shops that are well-versed in working on these cars. You don’t necessarily need to rely solely on dealerships for servicing, which can often be more expensive. A quick search online or asking in Audi enthusiast forums will reveal numerous reputable independent shops in your area capable of handling maintenance and repairs for the Audi S5 4.2 V8.
Conclusion: A Reliable V8 with Minor Considerations
In summary, the 2010 Audi S5 engine, the 4.2 V8, is fundamentally a very reliable and robust engine. While there are common maintenance items like carbon cleaning and potential wear points in the suspension components, these are manageable and well-understood. The intake manifold issue was a specific manufacturing defect, not an inherent engine problem, and is unlikely to be a concern on vehicles today.
With regular servicing, using the correct grade of oil, and addressing wear items as they arise, the 4.2 V8 in the 2010 Audi S5 should provide years of enjoyable and dependable performance. If you’re considering purchasing one, a pre-purchase inspection by a qualified mechanic is always recommended, but you can approach your search with confidence in the underlying strength and longevity of this iconic V8 engine.
If you do take the plunge and get an S5, be sure to share some photos online! We’d love to see it.
