Audi S4 Engine Problems
77 owner complaints filed with NHTSA across 13 model years.
Complaints by Year
Worst year: 2010. Best year: 2019.
Owner Reports
A representative sample of complaints filed with NHTSA.
COOLANT PUMP BLEW OUT CAUSING THE ENGINE TO OVERHEAT.
MY COOLANT PUMP WENT OUT AND OVERHEATED THE CAR. THE COOLANT LEAKED OUT. MY CAR ONLY HAS 60K MILES ON IT. AUDI RECENTLY RECALLED COOLANT PUMPS FOR THIS VERY REASON ON THE A4, A5, A6 BUT HAVENT MADE THE RECALL FOR THE S CLASS. PLEASE BE A...
My 2018 Audi S4 has a catastrophic engine failure issue and this is common with the EA839 engine. There is a knocking in the motor that is caused by internal engine parts (rocker arms needle bearings) becoming loose and dislodged. The me...
I don't know because dealer will not allow me to inspect engine or send me a response to what caused failure. Seems by the sounds coming from the top end of the motor most likely cause is that rocker arm (or possibly a valve train)compon...
Engine mount failure at 60,000 miles
The R&R valve/oil separator unit failed on my 2015 Audi S4 at approximately 71,000 miles. This unit, when fails, can mix the oil and anti-freeze which can seize the engine. I was able to catch the problem before engine failure. Minnea...
MY 2014 AUDI S4 HAS A EPC LIGHT THAT KEEPS TURNING ON WHILE DRIVING THAT CAR. THE EPC LIGHT WILL PUT THE CAR INTO LIMP MODE AND WILL HAVE A ROUGH IDLE AND CAN BARLEY DRIVE. WHEN THAT LIGHT TURNS ON YOU HAVE TO PULL OVER IMMEDIATELY AND R...
I HAVE ENCOUNTERED THE PROBLEM OF AIR BUBBLE FORMATION IN MY FUEL SYSTEM (CODE 16903) WHEN READING CODES IN MY CAR. I THOUGHT IT WAS JUST A FUEL PUMP ISSUE SO I REPLACED IT. I THEN REALIZED IT WASN'T JUST A PUMP ISSUE AS THE CAR KEPT REA...
WHILE TRAVELING AT 75MPH, UPHILL, IN 100F WEATHER THE FUEL LOW PRESSURE FUEL SYSTEM DEVELOPED A VAPOR BUBBLE THAT STALLED THE LOW PRESSURE FUEL PUMP AND STARVED THE MOTOR FOR FUEL. THE CAR STALLED ON THE FREEWAY AND WOULD INTERMITTENTLY...
CARBON BUILD UP
AFTER ENGINE COOLS DOWN, TIMING CHAIN RATTLE CAN BE HEARD UPON STARTING THE CAR. CHAIN RATTLE MEANS THAT PLASTIC GUIDES OR ADJUSTERS ARE WORN, AND MIGHT GO ANY SECOND. SPOKE WITH AUDI REP ONLINE, WHICH ADVISES ME THAT THIS IS NORMAL, AND...
TRANSMISSION SHIFTS HARSHLY AND MAKES NOISE DURING SHIFTS. WAS TOLD THE MECHATRONICS NEED REPLACEMENT. SOMETIMES WHEN ACCELERATING THE CAR WILL JOLT AS IF IT IT LOSES POWER MOMENTARILY. WHEN MERGING INTO TRAFFIC IN COULD BE DANGEROUS.