| 1 | 0 | 3 | 4 | 3 | 4 |
2012 Audi A4 / S4 / RS4 repairs by problem area
Engine (42%)
Transmission and Drivetrain (8%)
Brakes and Traction Control (3%)
Suspension and Steering (12%)
Electrical and Air Conditioning (13%)
Paint, Rust, Leaks, Rattles, and Trim (15%)
Other (7%)
Chart based on 181 repairs.
2012 Audi A4 / S4 / RS4 engine repair cost distribution
$2500+ (5%)
$1000 - $2499 (13%)
$500 - $999 (8%)
$100 - $499 (15%)
< $100 (59%)
Chart based on 61 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2012 Audi A4 4dr Wagon
turbocharged 211hp 2.0L I4 8-speed shiftable automatic AWD
| 53800 mi US $350 |
Car electrical bus would seize up completely, car would start intermittently. Several error codes would pop up, but were all related to sticky relays which turned out to be in a TSB. Relays replaced, which solved the problem. |
| 48360 mi | Oil consumption test. The car requires 2 quarts of oil between the scheduled oil changes |
| 47000 mi US $900 |
Turbocharger was replaced as a warranty item. water pump replaced |
| 32000 mi | replace water pump |
2012 Audi A4 4dr Wagon
supercharged 333hp 3.0L V6 7-speed automated manual AWD
| 27000 mi | Fuel control module / pump failure. |
2012 Audi A4 4dr Sedan
turbocharged 211hp 2.0L I4 8-speed shiftable automatic AWD
| 77000 mi US $85 |
leaking water pump |
| 34000 mi | One of the hoses in the engine bay had come loose and needed to be replaced. The car was in & out in 1 day and the impression i got was that the repair was very straightforward. No issues since getting the car back. |
| 38000 mi | check engine light - MIF sensor |
| 54000 mi US $900 |
Leaking water pump |
| 63000 mi US $310 |
CEL for System Too Lean. Replaced leaking oil separator breather valve. |
| 81000 mi US $500 |
Replaced oxygen sensor. |
| 86000 mi | Excessive oil consumption (>4 quarts/1.5k miles). Pistons and associated gaskets replaced under warranty despite 85k miles on the car. |
| 142000 mi US $1700 |
Resealed upper cylinder head cover due to oil leak. |
| 37200 mi C $1587 |
Flashing Engine Light and EDC lit. Fuel Injector failure. Bore scope found Fuel Injector w/ constant fuel leak. Fouled Spark Plugs and Oil smelled of Fuel. going thru Audi Canada for partial/all reimbursement |
| 45880 mi | Waste gate caused a check engine light. Waste gate is integral to turbo, turbo replaced. Free replacement under a Audi extended warranty, otherwise $3,000+ |
| 111000 mi US $3 |
Started burning engine oil 1 qt every 1000 miles. Added $3 engine sealer from amazon.com and problem solved. |
| 115000 mi US $20 |
Check engine light - P0421 Erased using OBD controller and never came back again. |
| 115000 mi US $20 |
Engine oil burning started again. warranty expired, adding engine oil every 1000~3000 miles when the light came on. |
| 178000 mi US $12000 |
Timing belt broke, need a rebuild or new engine! Most places wont attempt a rebuild! |
| 36000 mi | Check engine light came on while driving, no change in way engine ran. Determined the crankcase breather valve, oil separator was the culprit. |
| 45800 mi | Service bulletin for crank case breather valve was to be replaced. |
| 81000 mi | Left and right engine mounts leaking hydraulic fluid |
| 103000 mi US $1500 |
decarbonize intake and injectors, replace spark plugs |
| 62000 mi US $250 |
Vacuum leak, oil separator |
| 96000 mi US $900 |
Water pump failure. Replaced |
| 110000 mi | Crank case breather valve replaced |
| 119000 mi | Abrupt oil usage issues. service dept said needed new piston rings. 2012 was not covered under the recall. |
| 67000 mi | Turbocharger failed; covered under TSB |
2012 Audi A4 4dr Sedan
turbocharged 211hp 2.0L I4 8-speed shiftable CVT FWD
| 61000 mi | Thermostat housing issue Water pump A/C Compressor Engine was leaking oil. Decided to sell the car |
2012 Audi A4 4dr Sedan
turbocharged 211hp 2.0L I4 6-speed manual AWD
| 50400 mi | remove throttle body and replaced N80 fuel evap valve, performed GFF scan, fault for 02 sensor, cause of faulty crankcase breather |
| 39680 mi | Replaced bad injector cylinder number 4 - misfire code. Cleaned the intake ports at the same time. |
| 66340 mi | Cold start misfire. Stumbling when cold under acceleration. Determined bad fuel injector cylinder 1. Decided to replace all four under recent Audi extended warranty campaign for fuel injectors. |
| 85000 mi US $2500 |
Carbon build up on injectors caused by direct inject resulted in check engine light and required cleaning to prevent other damage |
2012 Audi A4 4dr Sedan
turbocharged 170hp 1.8L I4 8-speed shiftable CVT FWD
| 50220 mi $4000 |
One of the piston misfire, may require engine overhaul; update: still in shop two months later |
2012 Audi A4 4dr Sedan
supercharged 333hp 3.0L V6 7-speed automated manual AWD
| 14000 mi | Engine throwing ecm codes. ECM replaced. Replaced all 6 fuel injectors. |
| 31000 mi | Thermostat failed. Replaced by dealer under warranty. |
| 36000 mi | Loud vibration/noise at idle and accelerating from stop. Loose/missing exhaust clamp. Replaced. |
| 55000 mi US $1000 |
Mass Airflow sensor was replaced. $750 just to remove the supercharger to replace a $25 part. |
| 61380 mi | Thermostat stuck closed. Car overheating. Car was towed to the dealership. Water-pump replaced at same time due to leakage. 200 paid and rest covered by warranty.. |
| 28000 mi | burning oil at a pretty high rate (about 1 qt every 1k mile or less. The dealer performed an oil consumption test and had the piston rings replaced on all cylinders. |
| 68200 mi C $200 |
Requested code for engine light. |
| 72000 mi US $345 |
Oil filter housing |
| 57000 mi | Chain tensioners were replaced due to excessive noise on cold startup per TSB #2039995/2. |
| 89000 mi US $77 |
Car was low on coolant. Owner refilled coolant and level dropped again. Dealer noted no leaks in system. Coolant level stable for now. |
| 99000 mi US $144 |
Coolant level low Shop couldn’t find any leak. Continues to slowly drop over a period of several months |
| 52000 mi | Replacement of leaking water pump |
| 35000 mi | Thermostat failed closed. Dealer representative indicated this is due to the plastic t/stat housing distorting, causing the thermostat to bind. Dealer representative indicates design has not been changed -- new part is the same G336 Intake manifold flap sensor found faulty. Fault P2014 |
| 40000 mi US $1200 |
Cranking longer on cold start. Diagnosed as failing fuel pump |
| 59600 mi C $100 |
cylinder misfire, diagnosed to be ignition coil. replaced. |
| 71 mi | check engine light - secondary exhaust carbon build up. build-up removed. |
| 12000 mi US $568 |
Supercharger auxiliary cooler was punctured by debris causing a coolant leak & requiring replacement. Not covered by warranty. |
| 3000 mi | EPC light would come on and car would misfire under full throttle. Dealer swapped the number 6 coil pack with number 5 and problem solved. |
| 37000 mi | fault for sec air scan |
| 41300 mi | Had to have carbon build up removed per the existing Audi tsb. Surprising it occurred this early since I drive mostly highway miles |
| 37000 mi | Thermostat failed at ~36,600 miles |
| 10000 mi | Check engine light came on. Vehicle ran fine, OBD2 diagnostic revealed a very slight fuel mixture imbalance. Dealer said they replaced some parts of the fuel rail to injectors and updated the ECU program. Car runs a bit smoother now. |
| 43000 mi | oil kept burning every 5000 miles, they changed out some valve |
| 20000 mi | Nuisance Check Engine Light - Software upgrade was installed to ensure problem wouldn'r reoccur. |
| 49000 mi | Engine was burning a qt of oil every 3k miles. Dealer took oil sample for analysis, topped off oil and told me to come back when gauge read low again to send to Audi for next steps. |
2012 Audi A4 4dr Sedan
supercharged 333hp 3.0L V6 6-speed manual AWD
| 24000 mi | burning smell during hard acceleration with AC on. |
| 32000 mi | Only issue was exhaust smell inside cabin during hard acceleration. Dealer replaced air box inside but did not resolve the problem. |
| 50000 mi US $1200 |
Secondary Intercooler cracked because of a rock. Needed to be replaced and cooling system reinstalled and fixed. |
| 13300 mi US $1100 |
Rock hit radiator. Radiator leaked. |
| 24000 mi | Car overheated. Replaced thermostat. |
| 30000 mi | audi secondary air injection system P0491 audi secondary air injection system P0492 Fixed on third visit, cleaned carbon build-up with walnut shell blasting. |
| 42900 mi | The dealer diagnosed a bad clutch based on my report that revs were "hanging" (i.e. rpms were not dropping as expected) when I engaged the clutch on a first to second shift. The car is driveable and I have not repaired it yet. Audi refuses to warranty. |
| 34000 mi | Engine Rear Main Seal leaking, needed replacement, required 11 hours of labor covered by warranty |
| 62000 mi C $120 |
Check engine light on due to carbon buildup in secondary air intake. Cleaning performed by Audi under extended warranty. Cost was for a couple clips and coolant not covered. |
| 8000 mi | Hole in auxiliary radiator. |
2012 Audi A4 4dr Sedan
| 67580 mi A $400 |
PCV valve replacement |
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