This bulletin provides information when, after replacing the mechatronic unit/gearbox, the engine only starts when the button has been pressed twice.
full bulletin at NHTSA ↗2010 Audi S4 powertrain problems
moderate Owners of the 2010 Audi S4 have filed 42 NHTSA complaints about the powertrain, typically surfacing around 63,000 miles at roughly $2,500 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See powertrain across all vehicles →
Failure mileage
Complaints
42
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2010 S4 (this page) | 42 |
| 2011 S4 | 22 |
| 2012 S4 | 14 |
| 2013 S4 | 8 |
| 2014 S4 | 3 |
When does it fail?
Of the 42 powertrain complaints filed for the 2010 Audi S4, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 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.
How fast does it fail?
Cumulative share of the 10 mileage-bearing powertrain complaints filed against the 2010 Audi S4 by each odometer reading. Median failure: 65,000 mi.
10% have failed by38,000 mi
Half the fleet by65,000 mi
90% have failed by99,000 mi
Curve based on owner-reported odometer mileage at the time of complaint. Reflects when owners filed, not when symptoms first appeared. Maintenance habits and driving conditions shift the curve.
What stands out
Of the 5 model years of Audi S4 we track for powertrain problems, this one carries the most owner complaints on file — 42.
Owners have filed 42 powertrain complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain 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 TSB provides information when event memory entries cannot be deleted (Mode$0A error) on gearboxes: DL501, DL382/DL382E and DQ500.
full bulletin at NHTSA ↗This bulletin offers information about the basic information needed for technical requests for gaerbox complaints.
full bulletin at NHTSA ↗This bulletin offers information about the basic information needed for technical requests for gaerbox complaints.
full bulletin at NHTSA ↗This bulletin provides information when there is a fault shown; Engine: start/stop system, and the start system is not 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
The 2010 Audi S4's 7-speed S-Tronic DSG transmission is plagued by mechatronics unit failure, with owners consistently citing a known design flaw: a circuit board submerged in transmission fluid that controls hydraulic valve operation. Failures typically occur between 50k–75k miles and manifest as total loss of gear engagement, vehicle limp mode with restricted acceleration, and inability to shift into Drive or Reverse. Warning messages read "Gearbox malfunction: you can continue driving" or "do not continue driving," sometimes paired with false TPMS alerts.
Beyond catastrophic failures, owners report chronic jerky shifting, violent downshifts that feel like rear-end collisions, hard clunking when selecting gears, and skipped gears (1st to 3rd). These issues worsen in stop-and-go traffic and cold starts but persist even after multiple dealer visits; shops report inability to reproduce the faults in-house.
Repair costs range $3,000–$5,334 for mechatronics replacement; full transmission replacement exceeds $10,000. Audi has not issued a recall despite a December 2012 TSB outlining the sensor failure issue and a pending class-action lawsuit. Warranty coverage is inconsistent; some out-of-warranty owners report denial until threatening legal action. The consensus among owners is that Audi is aware of the defect but refuses accountability.
Same Audi S4 powertrain reports on nearby years: 2011 · 2012
Failure modes owners describe
Mechatronics unit failure / loss of gear engagement
The mechatronics module (circuit board controlling transmission hydraulics) fails, causing partial or complete loss of forward/reverse gear engagement. Vehicle either cannot shift into gear, gets stuck in neutral or one gear, or loses specific gears (e.g., reverse, 2nd, 4th). Often accompanied by transmission warning lights and limp mode.
When: Occurs between ~50k–75k miles on vehicles in service; can occur during any driving scenario (highway, stop-and-go, parking maneuvers). Some owners report failure within 2 months of purchase.
Symptoms owners cite: Gearbox malfunction warning light with messages like 'you can continue driving' or 'do not continue driving'; Vehicle enters limp mode, restricts acceleration and shifts to even-numbered gears only; Unable to shift into Drive or Reverse, or car stuck in Neutral; Loss of specific gears (e.g., no reverse, missing 2nd gear); Engine revs but no forward motion (clutch not engaging)
Codes mentioned: Module G676 (mechatronics control module), Gearbox malfunction codes
Repairs/costs cited: Owners cite replacement costs ranging $3,000–$5,334 for mechatronics unit alone; full transmission replacement $10,000+. Some dealers claim they replaced only the circuit board, then demanded additional $3,800+ for full unit. Audi initially denied warranty coverage on out-of-warranty vehicles; some owners reported Audi covered repairs only after threat of legal action.
Recalls/TSBs owners mention: TSB 35 12 08 2032211/1 issued December 2012 for sensor failures; class action lawsuit mentioned by owners. Audi has not issued recall. Some dealerships claim TSB exists for this warning but will not cover repairs.
Jerky / harsh shifting and engagement issues
DSG transmission shifts abruptly and uncomfortably, especially when downshifting or coming to a stop. Clutch engagement/disengagement appears faulty. Shifts feel like violent jolts or the car has been rear-ended. Affects low-speed and stop-and-go driving.
When: Intermittent; worsens in cold engine temperatures and low-speed driving. Can develop after several years of ownership; becomes more pronounced over time.
Symptoms owners cite: Hard, violent clunking when selecting gears from Park to Reverse to Drive; Sudden jerking and surging forward when coming to a stop; Lurching or jolting on takeoff from a complete stop (feels like rear-end collision); Rough, erratic shifts between 1st–2nd and 2nd–1st gears; Banging sound in transmission during gear transitions; Transmission holds gear until last instant before stopping, then hard downshift; Skipping gears (jumping from 1st to 3rd, 3rd to 5th, etc.); Bouncy or jerky operation in Reverse, especially uphill
Codes mentioned: Gearbox malfunction codes (associated with shifts, not necessarily mechatronics failure)
Repairs/costs cited: Owners report taking cars to dealers multiple times with no resolution ('dealer keeps saying they cannot reproduce'). No specific repair cited beyond 'transmission service' or complete unit replacement. One owner had DSG fluid changed shortly before malfunction warning appeared.
Recalls/TSBs owners mention: Dealers acknowledge issue but report inability to reproduce in shop. Audi corporate stance not to cover these under warranty.
Simultaneous gearbox and TPMS malfunction warnings
Gearbox malfunction warning appears simultaneously with tire pressure monitoring system (TPMS) error, suggesting a common electrical or control module issue affecting both systems. Pattern occurs repeatedly across multiple vehicles.
When: Can occur at any driving speed (city, highway). Multiple incidents reported at 45–65 mph.
Symptoms owners cite: Both gearbox malfunction and TPMS warnings illuminate simultaneously; Often accompanied by throttle response lag and jerking; Warnings may clear after restart but return after continued driving
Codes mentioned: Gearbox malfunction codes, TPMS system malfunction codes
Repairs/costs cited: No specific repair cited for this pairing beyond mechatronics replacement.
Parking brake and gearbox malfunction co-occurrence
Parking brake error warning appears alongside gearbox malfunction. Raises safety concern about potential unintended brake application while driving.
When: Reported at highway speeds (50–70 mph).
Symptoms owners cite: Parking brake error warning on dashboard; Gearbox malfunction warning occurs simultaneously; No transmission acceleration possible
Codes mentioned: Gearbox malfunction codes, Parking brake error codes
Synthesized from 42 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 12 most recent
Mechatronics unit failed in the vehicle automatic transmission. Transmission failure message listed on car dashboard. Car would not shift out of 1st gear and there was no reverse gear. Car had to be towed to the dealership for repair. Multiple web forum posts stated the Audi b8 models suffered this failure frequently. *tr
Gearbox malfunction
My s4 lunges at stops, or it feels like I've been hit from behind. Takeoff from a stop is bouncy, bouncy reversing, especially uphill. If I take my foot off the breaks and hesitate before accelerating, sometimes it's smooth. The tac bounces while coasting to a stop, or going down hill with foot off the pedal. These issues have been intermittent the last several years, but are now more profound.…
The transmission begins to jerk and slam causing the vehicle to accelerate just prior to stopping in stop/go traffic. Noticed that this happens only after driving in stop/go situations and usually around 5mph. Also clanks/jerks while in reverse. Dealer keeps saying they cannot reproduce. *tr
While driving in rush hour bumper to bumper traffic the 2010 Audi s4 with the dsg s-tronic transmission becomes very jerky, causing it to surge when starting and stopping or driving at low speeds. As a result it is hard to control, especially in tight traffic, parking areas, or around pedestrians. Additionally, when coming to a complete stop when in this condition the shift from 2nd gear to first…
Jerky dsg transmission shifts, whether downshifting or up shift. Going slow or fast, this only happens once trans is up to temp, I'm pretty sure my mechatronics unit is failing.
Audi 7sp dl501 's-tronic' transmission for: 2010-2015 Audi s4 and s5, 2013-2015 Audi rs5, s6 and s7. Vehicles experience mechatronic unit failure and clutch faults. Resulting in: sudden shaking and violent 'juddering,' hesitation from the car when pressing the gas pedal, a 'surge' forward that feels like the car has been rear-ended, and hard downshifting or clunking when slowing down or driving…
My car flashed gearbox malfunction while driving down interstate I-264 in louisville ky. Car seamed fine for about 2 miles and then suddenly went limp and I had no gears. Had to hit flashers and coast into median. Was almost hit by semi truck. Repair shop could not find anything wrong. Happened again 1 day after getting it back from shop. Taking it to Audi now. I have read that this is…
I was driving on a normal stretch of flat highway approximately 65mph and the dash lit up like a christmas tree out of the blue. Car indicated reverse gear not available, transmission warning lights, and tire pressure monitor system problem all at the same time. Car went in to a "limp mode" and it only shifted in even number gears, and felt like the car was dangerously unstable due to erratic…
At approx 55k miles, mechatronics unit failed. Extremely rough shifts from 1-2 and 2-1, lurching forward after coming to complete stop. Dealership replaced mecharonics unit. At 74k miles entire dsg gearbox failed, while on highway with virtually no power or ability to accelerate. Luckily traffic was at near stop due to rush hour, was able to make it to next offramp in what they call 'limp mode'.…
Had powertrain 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 powertrain problem on the 2010 Audi S4?
It's a documented issue but not catastrophic. 42 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Across the 39 complaints that reported odometer mileage, most powertrain failures cluster between 48,000 and 79,000 miles, with the median around 63,000. A quarter of owners report trouble before 48,000; a quarter make it past 79,000. 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 $2,500 for powertrain 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 powertrain?
No active recalls currently cover powertrain 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.