TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, and the transmission oil cooler is transferred to the new transmission.
full bulletin at NHTSA ↗2012 Kia Sorento powertrain problems
severe Owners of the 2012 Kia Sorento have filed 49 NHTSA complaints about the powertrain, typically surfacing around 50,000 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
49
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2008 Sorento | 21 |
| 2009 Sorento | 9 |
| 2011 Sorento | 245 |
| 2012 Sorento (this page) | 49 |
| 2013 Sorento | 61 |
| 2014 Sorento | 63 |
| 2015 Sorento | 34 |
| 2016 Sorento | 122 |
6crashes
4injuries
What stands out
Owners have filed 49 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 provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced.
full bulletin at NHTSA ↗PITSTOP: AWD SYSTEM CONCERN DUE TO TIRE CIRCUMFERENCE - This Pitstop provides information regarding potential concerns with the All-Wheel-Drive (AWD) system due to tire sizes of differing circumference. Some customers may complain of a chatter sensation felt in the drivetrain of the vehicle and/or the failure of drivetrain component(s). A difference in tire size (width, aspect ratio, construction, rim diameter etc.) may be the cause.
full bulletin at NHTSA ↗TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, refer to applicable vehicles in the chart starting on page 2.
full bulletin at NHTSA ↗TECHNICAL SERVICE BULLETIN: - TRANSMISSION FLUID APPLICATION GUIDE - This bulletin has been revised to include additional information. This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, refer to applicable vehicles on page 2. Refer to the shop manual on KGIS for the specific Kia model for the correct transmission fluid check/fill procedures.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of 2012 Kia Sorentos describe a constellation of powertrain failures spanning transmission, engine, park-shifter interlock, and stalling events. The most severe and recurring issue is the brake-shift interlock failure—children and adults have been able to shift the vehicle out of park without the ignition on and without foot pressure on the brake, leading to unintended rollaway on inclined driveways and driveways. Multiple reports involve serious injuries: a child crushed between the vehicle and a tree, an adult struck and dragged, and vehicles rolling into gates and streets.
Transmission problems dominate service visits: owners report multiple transmission replacements (some vehicles received four new units within weeks), delayed shifts into third and fourth gear with sustained RPMs above 4,500, transmission slipping out of park into neutral while parked, loss of power during acceleration, and complete transmission failure. Engine troubles include sudden loss of power while accelerating or climbing hills, stalling at stop signs and red lights (sometimes multiple times), blue smoke at startup, and seizure at highway speeds. One owner with 95,000 miles had the engine seized and needed a replacement outside the 100,000-mile warranty period. Oil consumption problems appear across multiple narratives, with some owners topping off every 1,000 miles. A rear axle clunk and movement is reported, along with clicking noises from the shift console area when braking. Dealerships frequently tell owners "nothing is wrong" or "this is normal operation," and diagnostic scans often retrieve no fault codes or cannot reproduce the failures.
Same Kia Sorento powertrain reports on nearby years: 2011 · 2013 · 2014 · 2015
Failure modes owners describe
Brake-shift interlock failure (unintended park disengagement)
Shift lever can be moved out of park without ignition on, without brake pedal engagement, or with minimal force, allowing vehicle to roll unintentionally on inclined surfaces
When: Reported across model years; some instances noted 2-3 years into ownership
Symptoms owners cite: Able to shift from park to neutral or reverse without key in ignition; Able to shift without brake pedal pressed; Vehicle rolls downhill after child or operator shifts lever; Shift lever moves with light force application; Vehicle rolls while parked on incline with engine off
Repairs/costs cited: Some owners report shifter assembly replacement under warranty; one owner had shifter assembly replaced twice (March 2012, September 2013); repair described as 'broken pin which holds vehicle in park'
Recalls/TSBs owners mention: NHTSA Recall 15V626000 (Power Train) issued; multiple owners report recall repair performed but failure recurred; one owner states recall repair was 'one-time free repair' with no further assistance
Transmission failure and loss of power
Automatic transmission exhibits sudden loss of acceleration, inability to shift into higher gears, delayed shifts with elevated RPM hold, complete failure requiring replacement, or vehicle stalling during acceleration
When: Reported between 6,000 and 104,000 miles; multiple instances within first 2 years of ownership
Symptoms owners cite: Sudden loss of power while accelerating or climbing hills; Transmission does not shift smoothly into third and fourth gears; RPM climbs to 4,500–6,500 at speeds of 35–45 MPH; Vehicle stalls or loses power during acceleration from stop; Transmission slips out of gear or fails to hold park; Delayed transmission response on highway merge; Vehicle locked in fourth gear, cannot shift up or down
Repairs/costs cited: Multiple transmission replacements on single vehicles: one owner had four new transmissions installed within 27 days; labor-intensive; one owner charged $3,600 for transmission repair (quoted) at 68,000 miles; some transmissions kept in shop for 1–2 weeks per replacement
Recalls/TSBs owners mention: Recall 15V626000 (Power Train) mentioned; dealers initially told owners 'nothing is wrong' or 'this is how the vehicle is designed'; one mechanic advised owner needed software update for hard transmission shift; manufacturer told owner 'if dealer cannot diagnose, we cannot assist'
Engine seizure, stalling, and loss of power
Engine seizes while driving at highway speeds, vehicle stalls unexpectedly at stop signs and traffic signals, loss of all power, or abnormal engine shutdown with dashboard warning lights illuminating
When: Reported between 6,000 miles and 104,000 miles; some instances occur within 8–10 months of purchase
Symptoms owners cite: Engine seizes on highway at 45–70 MPH; Vehicle stalls at stop signs with all dashboard lights illuminating; Complete power loss while driving; vehicle coasts to stop; Stalling occurs intermittently with no warning codes stored; Engine shuts off in middle of driving; tachometer drops to zero; Vehicle lurches forward after stall when restarted; All electronics remain on but engine dead
Codes mentioned: C1613, C1205, C1206, C1207, C1208, C1210, C1211
Repairs/costs cited: One owner required full engine replacement at 95,000 miles (outside warranty); another required engine replacement after brake service; one vehicle had engine replaced and then required second replacement after pistons 'blew up'; repair shops unable to locate fault or reproduce issue
Recalls/TSBs owners mention: Recall 17V224000 (Engine and Engine Cooling) and 15V626000 (Power Train) mentioned in two narratives; one owner states parts distribution disconnect—recall repair not available as of June 2016; another owner advised manufacturer could provide no remedy
Abnormal engine noise and knock
Loud knocking, popping, or pinging sounds from engine compartment; metal-on-metal noise; blue smoke on startup; unusual vibration at highway speeds
When: Reported as early as 69,000 miles and across multiple years of ownership
Symptoms owners cite: Loud popping sound when starting vehicle with push-button start; Vehicle lunges forward or backward in park during startup; Pinging or metal-on-metal knocking sound from engine; Blue smoke visible on cold startup; Loud banging noise felt while driving (feels like hitting object); Noise persists after oil changes; Check engine light illuminates
Repairs/costs cited: One owner reports KIA issued update under dealership recall number SA087 for startup pop/lunge; update installed but problem persisted; another owner required rod bearing replacement (not yet performed); one owner had engine replaced after noise issue but noise continued, requiring second engine replacement
Recalls/TSBs owners mention: Recall SA087 issued for startup noise and lunge; recall repair performed but failure recurred; KIA monitoring case directly; one owner advised warranty did not cover engine replacement due to lack of oil change receipts
Excessive oil consumption
Engine burns or leaks oil at abnormal rate, requiring topping off between service intervals; oil pressure switch failure causing leakage
When: Reported at 68,000 miles and beyond; some instances require oil top-off every 1,000 miles
Symptoms owners cite: Oil level dropping rapidly between oil changes; Requiring 3–4 quarts of oil between services; Oil pooling in engine valley; Oil pressure warning light illuminates; No visible external leak found during inspection; Vehicle consuming 1 quart per 1,000 miles
Repairs/costs cited: One owner quoted $3,600 for transmission and oil repair at 68,000 miles; one repair identified bad oil pressure switch with manufactured hole in engine valley draining oil; KIA dealership conducting oil consumption test (results not provided)
Rear axle clunk, movement, and noise
Clicking or clunking noise from rear axle during deceleration or initial startup; excessive movement of transmission or drive axles detected
When: Reported as recent onset; owner notes problem began recently but did not occur previously
Symptoms owners cite: Clunk at initial start and upon deceleration above 30 MPH; Click and clunk at exactly 30 MPH deceleration; Tech notes 'subtle movement of trans mounts or drive axles'; Clicking noise from shifter area when brake applied
Repairs/costs cited: Dealer test-drive concluded 'operating as designed' despite owner reporting recent onset; only 0.02 miles driven during diagnostic; tech noted service line started but no repair performed
Recalls/TSBs owners mention: Dealership stated 'axle could freeze up but just pull over'; dealership refused repair despite owner's planned highway trip
Shifter console clicking and mechanical issues
Intermittent clicking noise from shift console area when braking or during normal operation; previously repaired under warranty but noise reappears
When: Reported as early as first ownership year; issue recurs after initial warranty repair
Symptoms owners cite: Clicking sound from gear shifter area when brake is applied; Sound like something hitting plastic inside console; Noise occurs every time vehicle brakes under approximately 10 MPH; Issue repaired under warranty but reappeared after approximately 1 year
Repairs/costs cited: One owner had shifter repaired approximately 1 year prior; noise has reappeared; dealership stated 'broken part did not affect safety'
Electrical system and component failures
Intermittent electrical glitches causing multiple warning lights and chimes, ignition switch sticking, airbag warning light, non-functional heated seats, non-functional power windows and mirrors, and fuel door latch failure
When: Reported from 87,000 miles onward; airbag light at 115,996 miles; fuel and electrical issues noted across multiple ownership years
Symptoms owners cite: All warning lights flash and chimes sound unexpectedly; Warning light glitches lasting less than 40 seconds; Ignition switch sticks occasionally, sounding 'key in' chime; Doors fail to lock due to ignition switch issue; Driver airbag warning light illuminates intermittently; Heated seat feature non-functional; Power windows non-functional; Power mirrors non-functional; Fuel door latch failure
Repairs/costs cited: No repairs listed in narratives; electrical gremlins attributed to fuse box grounding issue by independent mechanic
Vehicle vibration and pulling to one side
Excessive vibration at highway speeds (interstate speeds around 70 MPH) and consistent pulling of vehicle to the right despite new tires and multiple alignments
When: Reported early in vehicle use; pulling to right noted despite no previous accidents
Symptoms owners cite: Vibration when traveling at interstate speed (70 MPH); Vehicle pulls strongly to right; Problem persists after new tire installation; Problem persists after multiple wheel alignments; No accident history to explain pulling
Repairs/costs cited: Multiple alignments performed with no correction; new tires installed without resolving pull
Transmission shift delay and rough shifting
Transmission exhibits hesitation or delay shifting into gear, hard or jerky shifts, or inability to shift smoothly
When: Reported year after engine replacement in one narrative; manifests as intermittent issue
Symptoms owners cite: Transmission hesitates to shift into gear; Hard transmission shift quality; Vehicle jerks during shift events; Rough driving quality when shifting
Repairs/costs cited: Independent transmission shop (40+ years in business) identified need for KIA software update; KIA stated they had to 'research problem' and claimed never heard of issue
Axle bearing or drivetrain component wear
Right front axle leaking grease and requiring replacement; rod bearings requiring replacement
When: Reported after number of miles accrued; specific mileage not always stated but one instance at 81,000 miles
Symptoms owners cite: Right front axle leaking grease; Rod bearing wear detected; Knocking noise from engine
Repairs/costs cited: Right front axle replacement needed per service advisor; rod bearing replacement needed per independent mechanic (repair not yet completed in narrative)
Recalls/TSBs owners mention: Service advisor noted right front axle problems 'tended to occur after a number of miles had been incurred on KIA SORENTOS'
Synthesized from 49 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Had powertrain trouble with your 2012 Kia Sorento?
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 Kia Sorento?
It's a meaningful issue. 49 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Across the 38 complaints that reported odometer mileage, most powertrain failures cluster between 20,000 and 106,000 miles, with the median around 50,000. A quarter of owners report trouble before 20,000; a quarter make it past 106,000. 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/Kia/Sorento.
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.