BAD WATER PUMP AND CROSS BAR
2015 audi A8 engine problems
moderate 15 complaints filed with NHTSA · avg repair $3,100
Complaints
15
Recalls
0
Crashes
0
Avg fix
$3,100
What owners are reporting 11 most recent
Engine stalled as i approached departure terminal at Newark airport. Dealer has inspected and determined the Turbo Impeller is bent and requires replacement. Car will not run. This is a known problem on Audi turbo engines apparently. Just prior to stalling the oil low light came on then the car stalled out creating a hazardous safety situation for a perfectly well maintained car.
The stock turbo when right in the middle of traffic at 60,000 miles. Almost died in traffic as the car would not move out of the road. This is not exclusive to A8 but to all the audi cars with the 4.0T engine across many vehicle years. An OEM turbo should last 150k-200k miles (half that if aftermarket). Cost $10k to replace.
Car stalled in left turn lane. Restarted with difficulty, and loss of power. No warning lights. Diagnosed by dealer to be failed twin turbochargers. 45688 miles. Replaced under extended warranty. Dangerous as car stalled in an intersection with no prior warning.
THE CAR EXPERIENCED A OIL SEPARATOR FAILURE. THE MADE AN EXTREMELY LOUD WHISTLING SOUND AT IDLE. THIS IS A KNOWN ISSUE AND AUDI ISSUED A TSB FOR IT BUT DID NOT ISSUE A RECALL. THE CAR RAN VERY ROUGH. TO FIS THIS ISSUE I HAD TO PAY OVER $2,000 TO HAVE AN NEW VERSION OF THE OIL SEPARATOR INSTALLED. AUDI SHOULD ISSUE A RECALL ON THIS SINCE THEY KNOW THE ORIGINAL PART IS DEFECTIVE.
CAR RAN ROUGH ON THE WAY HOME FROM PICKING UP TAKE OUT DINNER - METALLIC, RAPID POPPING SOUND COMING FROM ENGINE BAY (FAINT WITH WINDOW UP). CAR DIED WHILE SLOWING AT A STOP LIGHT AND WOULD NOT TURN ON - STEERING WHEEL ALSO LOCKED, POWER BRAKES FAILED. I WAS ABLE TO BRING MY CAR TO A STOP BEFORE STRIKING A BOULDER USING NON-POWER BRAKES. CAR WAS TOWED TO NEAREST AUDI DEALERSHIP AND I WAS INFORMED …
The contact owns a 2015 Audi A8. The contact stated that while driving approximately 55 MPH, the check engine warning light illuminated and the vehicle that stalled. The vehicle was towed to the dealer. The dealer diagnosed the vehicle and stated that the engine failed and needed to be replaced. The vehicle had not been repaired. The manufacturer was made aware of the failure and opened a case. Th…
MY CAR'S ENGINE STARTED STUTTERING AND IDLING VERY ROUGHLY WHILE EXITING THE EXPRESSWAY. THE EC AND CHECK ENGINE LIGHTS CAME ON. IT CONTINUED TO SHUTTER, AND SHAKE, UNTIL IT SHUT OFF. IT WOULDN'T RESTART, AND I HAD TO HAVE IT TOWED TO THE DEALERSHIP WHERE I PURCHASED IT. THE DEALER CONFIRMED THE ISSUE, AND REPORTED THE TURBOS HAD EXCESSIVE PLAY AND SCORING ON THE SURFACE OF THE HOUSING, CAUSED BY…
REGULAR DRIVING EAST BOUND ON I-80 AND AFTER GOING UP A HILL MY CAR COULDN'T GO OVER 3500 RPMS. THOUGHT IT WAS THE ECU PUTTING IT INTO LIMP MODE BECAUSE OF WEATHER CONDITIONS. TURNED OUT BOTH MY TURBOS BLEW AT 67,000 MILES AND LEAD TO TOTAL ENGINE FAILURE WITH METAL SHAVINGS REACHING THE EXHAUST AND LOITERING THE OIL PAN.
AFTER GETTING OFF THE HIGHWAY, THE ENGINE JUST QUIT. FORTUNATELY WE WERE AT A STOP SIGN AT THE END OF THE OFF-RAMP. THERE WAS NO WARNING AND WE WERE NOT ABLE TO RESTART THE CAR TO MOVE IT OUT OF TRAFFIC NOR COULD WE SHIFT INTO NEUTRAL. HAD THIS HAPPENED A FEW MINUTES EARLIER, WE WOULD HAVE BEEN TRAVELING AT 70 MPH. FORTUNATELY, MY SON WAS DRIVING, BECAUSE AT MY AGE HAD THIS HAPPENED AT HIGHWAY SPE…
Common questions
How serious is the engine problem on the 2015 audi A8?
It's a documented issue but not catastrophic. 15 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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