This bulletin provides information regarding UV leak additive for finding oil leaks.
full bulletin at NHTSA ↗2010 Audi S4 engine problems
moderate Owners of the 2010 Audi S4 have filed 12 NHTSA complaints about the engine, typically surfacing around 11,000 miles at roughly $3,100 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
Failure mileage
Complaints
12
Recalls
0
Avg fix
$3,100
When does it fail?
Of the 12 engine complaints filed for the 2010 Audi S4, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Reported failure mileage clusters in the 0-25,000 mi band — 5 of 6 complaints with an odometer reading on file land there.
No new NHTSA engine complaint has been filed on this vehicle in over 15 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This bulletin provides informatin when the engine does not run smoothly at idling speeds.
full bulletin at NHTSA ↗This bulletin provides information when the MIL is on; DTCs for misfire, air/fuel ratio imbalance, or lean fuel system stored in the ECM P030000.
full bulletin at NHTSA ↗This bulletin provides informatin when the engine does not run smoothly at idling speeds.
full bulletin at NHTSA ↗This bulletin provides information when ther is an Engine: start/stop system fault shown and start/stop system not is working; mileage below 50 km/32 miles.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Water pump failure dominates the complaint cluster. Ten of twelve narratives cite water pump problems in the 2010 S4 3.0T. The original black plastic pumps fail early—mostly before 10,000 miles—causing coolant leaks, overheating, and engine compartment steam. Failure happens without obvious warning and occurs in normal driving, cold starts, highway cruising, and even light city driving. Owners report flapping noises on cold mornings before complete failure. Coolant warning lights activate when failure occurs; one driver pulled off the highway at 1 a.m. to find coolant splattered throughout the engine bay.
Audi replaced failed units with revised aluminum or metal-body pumps, suggesting internal awareness of the design flaw. Dealers reported being slammed with incoming failures—one service advisor mentioned over 100 vehicles recently towed in one week. A TSB was issued but no U.S. recall followed; one complaint references a Canadian recall. Audi also issued and then retracted a Service Advisory when parts supply couldn't keep up, later restricting replacement to cars that had already broken down.
A separate gearbox malfunction complaint describes repeated limp-mode events despite a software update, with one dealer refusing warranty repair despite a TSB existing and the owner reporting the problem before warranty lapsed.
Cold weather appears to accelerate water pump failure based on owner reports, particularly in early 2010 winter months.
Failure modes owners describe
Water pump failure—plastic body
Original plastic-bodied water pump fails, causing coolant leaks and loss of engine cooling. Owners report failures occurred with plastic pumps that were replaced with revised aluminum or metal-body units. The plastic seal or plastic body itself is the defect.
When: Typically under 10,000 miles; failures documented in cold weather conditions (below -5°C); early 2010/2011 winter months when cars were new.
Symptoms owners cite: Coolant warning light—'coolant low, turn off engine and check coolant'; Smoke or steam from engine compartment; Coolant leaking or pooling under vehicle; Flapping noise from engine on cold starts; Engine overheating
Repairs/costs cited: Replaced with revised aluminum or metal-body water pump. Owners report dealer service was prepared for volume of replacements; one complaint mentions $5,628 total repair cost for multiple issues but parts cost for water pump alone not stated.
Recalls/TSBs owners mention: Audi issued TSB (Technical Service Bulletin) for water pump replacement; no formal recall issued in the U.S., though one complaint references a recall in Canada. One dealer initially had a Service Advisory but Audi later removed it due to parts supply constraints and restricted replacement to breakdown situations only.
Gearbox malfunction and limp mode
Vehicle enters limp mode with dash warnings for gearbox malfunction and parking brake malfunction, restricting power delivery and mobility. Software update applied at dealer but issue recurred on subsequent drive.
When: Not specified beyond one occurrence at 45 mph during normal driving; recurred next day during highway driving.
Symptoms owners cite: Gearbox malfunction warning on dash; Parking brake malfunction warning on dash; Vehicle enters limp mode—no response to throttle input despite gas pedal pressure; Warning clears after vehicle power-cycled (off/on)
Repairs/costs cited: Dealership applied software update; issue recurred. Vehicle remained at dealer for repair. Owner requested dealer cover full $5,628 repair cost as known issue with documented TSB.
Recalls/TSBs owners mention: TSB (Technical Service Bulletin) documented for this issue; dealership refused warranty coverage despite TSB and owner reporting issue before warranty expiration.
Synthesized from 12 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 6 most recent
On dec 8, my Audi s4, model year 2010, built end 2009, 11,000 miles, stranded with a leaking coolant system "out of the blue", during moderate highway driving. Warning system indicated to turn off engine and check coolant. Not necessarily safe in the middle of the night on a 8 lane highway. Audi service diagnosed and replaced a defect water pump with an "updated model" (metal body, replacing…
2010 Audi s4 with v-6 3.0t engine. Returning home after a 7 minute drive, I was 300 ft. From my house when I received an engine message coolant low, turn off engine and check coolant. I stopped in driveway to find my water pump had burst, as with several complaints here. I knew about this problem, as more than 50 other Audi s4 owners have experienced it and it is well documented on Audi…
While driving home from newark airport on nj turnpike at 1 a.m., the water pump failed on my 2010 Audi s4. The coolant warning indicated a problem. I made it to a service area within a few miles. I did not want to stop on the side of the road. I opened the hood and found coolant splattered all over the engine with steam rising up. The car was unsafe to drive and had to be towed to the dealer…
My car leaked a large amount of coolant noticed after it had been parked. I managed to drive it to dealer where the water pump was replaced under warranty. I was told that the plastic seal on the pump has failed with other customers and was replaced with a new metal seal. *tr
2010 Audi s4 water pump failure. *tr
Without warning my 2010 Audi s4 over heated while driving home from the store on wednesday night. Luckily my children were not with me because I had to pull off on the side of a busy road until the engine cooled down. From what I gathered on the internet several hundred Audi's had the same issue but no recall was issued. Only a tsb (technical service bulletin) was issued. Audi makes the customer…
Had engine trouble with your 2010 Audi S4?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2010 Audi S4?
It's a documented issue but not catastrophic. 12 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?
Across the 10 complaints that reported odometer mileage, most engine failures cluster between 9,800 and 13,000 miles, with the median around 11,000. A quarter of owners report trouble before 9,800; a quarter make it past 13,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
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.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2010/Audi/S4.
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. Some links on this page are affiliate links.