This TSB provides a procedure to diagnose and replace, if necessary, an automatic transmission with Incorrect Ratio DTC (transmission clutch slip in gear above limit) listed on Page 2.
full bulletin at NHTSA ↗2012 Hyundai Genesis powertrain problems
moderate Owners of the 2012 Hyundai Genesis have filed 37 NHTSA complaints about the powertrain, typically surfacing around 55,000 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
37
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2009 Genesis | 9 |
| 2011 Genesis | 7 |
| 2012 Genesis (this page) | 37 |
| 2013 Genesis | 23 |
| 2015 Genesis | 21 |
| 2016 Genesis | 8 |
1injury
When does it fail?
Of the 37 powertrain complaints filed for the 2012 Hyundai Genesis, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 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
Of the 6 model years of Hyundai Genesis we track for powertrain problems, this one carries the most owner complaints on file — 37.
Owners have filed 37 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 bulletin describes the procedure to replace the 35R and 4&OD solenoids for a shift flare and/or harsh shift during the 2~3, 3~4 or 4~5 upshift.
full bulletin at NHTSA ↗The automatic transmission warranty repair policy authorizes in-dealership repairs of the following components for both OEM (new) and remanufactured automatic transmissions:
full bulletin at NHTSA ↗If you are servicing a vehicle with a transmission slipping concern, follow the Service Procedure shown below and perform a stall test. This TSB provides a procedure to test each clutch in the transmission. If the vehicle fails the stall test, replace the transmission. ? PASS: Stall speed is between 1700~2900 rpm (See shop manual for stall speed). ? FAIL: Engine revs to redline limit (6,000~6,500 rpm). If so, replace the transmission.
full bulletin at NHTSA ↗This bulletin provides information regarding the changes in the timing chain and the crankshaft sprockets on certain Azera (HG), Santa Fe/Santa Fe XL (NC), Genesis (BH/DH), Genesis Coupe (BK), and G90 (HI) vehicles equipped with Lambda 3.3L / 3.8L GDI engines.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The dominant problem in 2012 Genesis complaints is transmission failure. Owners describe harsh, jolting upshifts (often between gears 2–3, 4–5, and 5–6) that cause the vehicle to lurch unpredictably in traffic. Transmission slipping is common—RPMs rise without corresponding speed increase, the car loses power for 1–2 seconds, then suddenly accelerates. Downshifts are erratic: the transmission hesitates when slowing to a stop, staying in a high gear, then suddenly dropping to 1st or 2nd when nearly stopped. These problems recur intermittently, sometimes cycling between normal and rough shifting for days at a time.
Engine stalling is the second major issue. Owners report the vehicle shutting off abruptly and without warning while driving—on highways, city streets, and at traffic lights. The engine dies, all dashboard lights illuminate, and power steering is lost. Dealers cannot reproduce the failures and report no diagnostic codes, leaving vehicles unrepaired. Cold-start failure is also reported: vehicles refuse to start when outside temperature is 40°F or lower.
Owners cite TSB 15-AT-005 (Drivability Problems with Transmissions) and claim Hyundai has replaced thousands of these transmissions, yet the manufacturer denies warranty coverage to second owners and out-of-warranty vehicles. Dealers have repeatedly been unable to resolve shifting issues, and transmission replacements sometimes fail again 35,000–50,000 miles later. Multiple owners report escalating to Hyundai corporate only to receive dismissal or no response.
Same Hyundai Genesis powertrain reports on nearby years: 2013 · 2015
Failure modes owners describe
Harsh or Rough Upshifts
Transmission shifts abruptly during acceleration, causing vehicle to lurch unpredictably. Occurs intermittently or in cycles, sometimes for days at a time then returning to normal, then repeating. Problem is unresponsive to multiple dealer visits and software updates.
When: 70,000–80,000 miles reported; varies across vehicles starting early in ownership
Symptoms owners cite: Abrupt or jolting shifts during upshifts; Lurching or jerking sensation felt in seat; Rough shifts between gears 2–3, 4–5, 5–6; Intermittent nature—smooth for days, then rough for days; Occurs at low motor speeds and during city driving or stop-and-go traffic
Repairs/costs cited: Multiple dealer visits without resolution; transmission fluid change did not resolve issue; TSB 15-AT-005 cited by owners for drivability problems
Recalls/TSBs owners mention: TSB 15-AT-005 (Drivability Problems with Transmissions); owners report Hyundai has replaced hundreds or thousands of these transmissions but denies coverage to out-of-warranty owners; no recall issued despite owner requests
Delayed or Incorrect Downshifts
Transmission hesitates to downshift or downshifts erratically. Common scenario: when slowing for a red light, transmission remains in a higher gear, then suddenly drops to 1st or 2nd when nearly stopped. When accelerating after the light, it may shift normally or roughly through several gears. Verified by technicians with diagnostic computer hooked to vehicle.
When: Reported from ~70,000 miles onward; recurring intermittently
Symptoms owners cite: Delay of 2–4 seconds in downshifting from 3rd/4th gear to 1st when decelerating quickly; Car coasts without power during the delay; Sudden downshift when nearly stopped at traffic light; Driver compensates by giving more gas, triggering traction control; Near-miss accidents due to delayed power response during turns or merges
Repairs/costs cited: Technician-verified with diagnostic computer; no fix available per owner reports; ongoing issue despite multiple dealer visits
Recalls/TSBs owners mention: No fix available; issue reported to Hyundai USA multiple times with no resolution
Transmission Slipping
Transmission intermittently loses engagement, causing a sensation of slipping or acting as though car is in neutral momentarily before suddenly re-engaging. RPMs rise without proportional speed increase, then catch abruptly. Occurs most between specific gear pairs (2–3, 4–5, 5–6).
When: 33,000–80,000+ miles reported
Symptoms owners cite: Sensation of slipping followed by sudden engagement; RPMs rise 6–7 or 7–8 thousand without speed change; Loss of power during acceleration or lane changes; Unsafe during merges onto freeways or turns across traffic; Unpredictable—no warning lights before failure; Can occur after transmission replacement, recurring ~35,000–50,000 miles later
Codes mentioned: Pressure sensor defect code (noted in complaint #8)
Repairs/costs cited: Fluid change produces no results; transmission replacement performed on multiple vehicles; replaced transmissions exhibit same behavior 35,000–50,000 miles later; high repair cost ($4,000+ for clutch/transmission work)
Recalls/TSBs owners mention: Owners report Hyundai has replaced hundreds or thousands of faulty transmissions; Hyundai denies coverage to second owners or out-of-warranty vehicles despite common design flaw; Manufacturer Communication 16-8at-011 cited but vehicle denied coverage
Engine Stalling or Loss of Power While Driving
Engine shuts off abruptly and unpredictably while driving, at various speeds (highway, city streets, traffic lights, intersections). Car loses power steering when engine dies. Restarts after minutes or several attempts. Occurs intermittently—7–8 times over two years for one owner; 6 times in less than a year for another. Dealers unable to diagnose; no error codes found.
When: Reported across mileage range; 50,000–120,000+ miles
Symptoms owners cite: Engine dies without warning; All dashboard indicator lights illuminate; Loss of power steering during stall; Difficult restart (may require multiple attempts); Engine idle rises to 1,500 RPM after restart; Check engine light may appear after incident; Occurs on interstate, highways, local streets, at traffic lights
Codes mentioned: Check engine light triggered after some stalls; no codes retrieved by dealers in multiple cases
Repairs/costs cited: No repairs completed; dealers report no error codes despite multiple diagnostic visits; vehicles returned to owners unrepaired
Recalls/TSBs owners mention: Hyundai corporate provided only dismissive responses; regional manager escalation did not yield resolution; dealers authorized not to work on issue; no TSB or recall issued
Cold-Start Failure
Vehicle will not start when ambient temperature is approximately 40°F or lower. Engine cranks continuously (push-button start) but does not turn over. Starts normally when temperature rises to 45°F or higher. New battery does not resolve issue.
When: Cold weather conditions (40°F or below)
Symptoms owners cite: Continuous cranking without engine start in cold; Immediate start when temperature rises; New battery (2 months old) does not resolve problem
Repairs/costs cited: Not specified in narratives
Hesitation or Loss of Power Under Acceleration
Vehicle hesitates or loses power when accelerator is depressed, particularly during merges, lane changes, or passing maneuvers. Power delivery is unpredictable and delayed. In some cases, transmission fails to downshift smoothly or at all.
When: Various speeds; commonly 5–30 MPH during low-speed driving
Symptoms owners cite: 1–2 seconds of coasting with no power applied while RPMs increase; Transmission downshifts to lower gears but no power reaches wheels; Sudden acceleration when power finally engages (2 seconds late); Dangerous during merges, passing, or turns across traffic; No warning lights before failure
Codes mentioned: Pressure sensor defect (Manufacturer Communication 16-8at-011)
Repairs/costs cited: Transmission checked; pressure sensor defect noted in at least one case; no repair performed due to lack of warranty coverage
Recalls/TSBs owners mention: Manufacturer Communication 16-8at-011 issued but vehicles denied coverage; no other response documented
Unintended Acceleration
Vehicle accelerates without driver depressing accelerator pedal. Brake pedal depression does not immediately stop vehicle. Engine revs to over 3,000 RPM without pedal input. Occurs at traffic lights and low-speed driving.
When: Low-speed driving; traffic lights
Symptoms owners cite: Acceleration without gas pedal input; Brakes ineffective or delayed in response; High engine idle (3,000+ RPM) after engine restart; Occurs intermittently; may operate normally after restart for short period then recur
Repairs/costs cited: Engine valve replacement attempted; failure recurred; transmission replacement attempted but not completed; manufacturer notified but no assistance offered
Recalls/TSBs owners mention: Manufacturer notified but no assistance offered; dealer unable to resolve issue
Transmission Gear Selector/Shifter Issues
Gear shifter seizes, fails to engage properly, or shifts out of drive independently. One case involved corrosion of shifter gear; another involved shifter seizing completely.
When: 49,000–86,000 miles; one case at 90 miles (very early)
Symptoms owners cite: Shifter seized and would not engage in drive; Gear shifted out of drive independently while driving; Transmission warning light illuminated after shift failure; Vehicle coasts when gear disengages
Repairs/costs cited: Shifter corrosion cleaned at dealer; no transmission replacement needed in that case
Recalls/TSBs owners mention: Manufacturer notified; stated no recall exists
Auto Hold System Failure
Auto Hold feature malfunctions at traffic lights, allowing vehicle to jerk forward when feature is active. System indicator changes from green (holding) to orange, and feature will not reset even after vehicle restart.
When: At traffic light; specific incident on stop light
Symptoms owners cite: Vehicle jerked forward at stop light despite Auto Hold engaged; Auto Hold indicator changed from green to orange; Feature would not reset upon vehicle restart
Repairs/costs cited: Dealership reset feature; replacement part ordered for Auto Hold unit
Manual Transmission Clutch Burnout
Clutch burnt out prematurely at only 26,000 miles on a vehicle owned for 5+ years. Owner reports safe, non-aggressive driving only. Research revealed 2,000+ posts from other Genesis Coupe owners with similar manual transmission issues.
When: 26,000 miles; very early in service life
Symptoms owners cite: Clutch failure despite low mileage and conservative driving
Repairs/costs cited: Clutch replacement cost $4,000 for a vehicle valued at ~$10,000
Manual Transmission Knocking and Shift Quality
Manual transmission produces loud knocking noise during gear changes, especially when clutch is disengaged and transmission in neutral. Shifts are hard and unexpected.
When: Various mileage
Symptoms owners cite: Loud knocking in transmission; Hard or wild unexpected jerks during shifts; Knocking occurs even with clutch disengaged and transmission in neutral
Repairs/costs cited: Transmission replacement required in at least one case due to faulty synchronizers; replaced transmission failed again 14,000 miles later and was not covered
Brake Pedal Sponginess and Brake Failure
Brake pedal feels spongy and unresponsive, particularly during braking. Initially diagnosed as brake rotor issue, but problem recurs even after rotor replacement. Related to NHTSA Campaign 13V489000 (Service Brakes, Hydraulic).
When: 25,000 miles after initial service; recurring ~25,000 miles later (~50,000 miles total)
Symptoms owners cite: Spongy brake pedal feel; Delayed braking response; Recurrence even after rotor replacement
Repairs/costs cited: Brake rotors replaced; front brakes replaced at 35,666 miles; issue recurred despite repairs
Recalls/TSBs owners mention: NHTSA Campaign 13V489000 (Service Brakes, Hydraulic) referenced but did not resolve issue
Synthesized from 37 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
According to Hyundai dealer, nothing wrong with transmission, they are unable to "duplicate the issue" I am experiencing, delayed shifting, high rpms, engine revs, and violently knocks into gear, runs normal for a few days and then back to the [xxx]! Also experiencing an issue when putting gas in the car, gas pump abruptly stops as if tank is full when it is not. We need a recall! Parts of this…
Had powertrain trouble with your 2012 Hyundai Genesis?
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 2012 Hyundai Genesis?
It's a documented issue but not catastrophic. 37 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 32 complaints that reported odometer mileage, most powertrain failures cluster between 31,000 and 80,000 miles, with the median around 55,000. A quarter of owners report trouble before 31,000; a quarter make it past 80,000. 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/2012/Hyundai/Genesis.
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.