Audi S4 (B8) common problems: what to check before you buy
Credov's researched list of the 2 faults the Audi S4 (B8) is known for (2008–2010), 2 of them serious or costly. Each one says what to look for when you check the car, so you can spot it before you buy. Not every car has these faults: they are the ones worth checking on this model.
Known problems on the Audi S4 (B8)
Gearbox warnings, missing gears or no reverse
Costly if missed
2008–2010 · Gearbox
What to look for: Check for a gearbox warning when selecting R and D from cold, and feel for skipped gears or slipping on the drive.
Why it matters: The 2008-2010 DL501 cars are reported for failing mechatronic units and premature multi-plate clutch wear; the escalation path is repair kit, then mechatronic, then whole gearbox. The same 0B5 box continued in these models to 2016, so run the same checks on later cars even though the cited report scopes 2008-2010.
2009–2016 · CAKA, CCBA, CGXC, CREC · petrol · Engine
What to look for: Check the coolant tank level, look for pink crust at the front of the engine, and watch the temperature gauge driving.
Why it matters: An overheating engine from a failed water pump or stuck thermostat can quickly lead to more serious engine damage if driven on, and the repair is a specific job around the supercharger rather than a simple pump swap.
Got a question about a Audi S4 (B8)? Ask Credov: a noise, a warning light, a part or how to fix it.
Also check on every car
On top of the faults above, every Credov inspection covers the basics: fuel smell, leaks or filler rust, engine oil leaks, power steering fluid leak, drive belt cracks or squeal, rust underneath: chassis and mounts, engine mounts, engine oil level and colour, coolant level, colour and leaks, head gasket failure signs, cold start: rattle, knock or smoke, rough or hunting idle, engine running hot on gauge, gearbox or diff oil leak, swapped gearbox without lvv and more.
Researched by Credov from manufacturer recalls and service bulletins, owner reports and workshop sources. Repair prices are typical ranges, not quotes. See also fault codes and repair costs.