This page covers 4 recalls and EPA fuel economy for the 2015 Audi S8.
20 mpg combined
11.8 L/100km
Midsize Cars
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted.
The 2015 Audi S8 has 4 recalls, with three of them posing a fire risk: fuel supply lines to the high-pressure fuel pump can develop leaks, and the engine compartment seal can loosen and contact hot engine components.
The fuel line concern appears in two separate recalls covering overlapping model years, but the core problem is the same: the high-pressure fuel pump supply line can become porous over time and drip fuel near ignition sources. The engine compartment seal issue is distinct, where a loose seal drifts inward and rests against hot surfaces under the hood, creating a burn risk in the engine bay. On the performance side, the turbocharger's oil supply strainer can clog, starving the bearings of lubrication. As those bearings wear, the spinning turbine wheel can graze the turbocharger housing or the shaft can snap entirely, causing the engine to stall without warning and leaving the driver without power while in traffic.
At a glance
What can fail
The turbocharger oil supply strainer can become blocked, reducing lubrication to the bearings and causing wear.
What the fix does
Dealers will replace the oil strainer and perform an oil change at no charge.
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Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The seal around the engine compartment can loosen and touch hot engine parts.
What the fix does
A retaining plate will be installed to keep the engine compartment seal from loosening.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The fuel supply line connecting to the high pressure fuel pump can develop small holes and leak fuel.
What the fix does
Dealers will install a fuel pressure damper at no cost to address the leak.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The high pressure fuel pump's fuel supply line may develop porosity over time, causing fuel to leak.
What the fix does
The fuel line will be replaced with a new one at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
