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 ↗2011 Kia Soul powertrain problems
severe Owners of the 2011 Kia Soul have filed 13 NHTSA complaints about the powertrain, typically surfacing around 40,000 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
13
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2010 Soul | 8 |
| 2011 Soul (this page) | 13 |
| 2012 Soul | 18 |
| 2013 Soul | 13 |
| 2014 Soul | 53 |
| 2015 Soul | 59 |
1injury
When does it fail?
Of the 13 powertrain complaints filed for the 2011 Kia Soul, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 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
No new NHTSA powertrain complaint has been filed on this vehicle in over 7 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 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 ↗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 ↗TSB: 6-SPD. A/T ADAPTIVE VALUE RESET /RELEARN - THIS BULLETIN PROVIDES THE PROCEDURES NECESSARY TO RESET AND RELEARN THE ADAPTIVE VALUES AFTER TRANSMISSION REPLACEMENT OR REPROGRAMMING/REPLACEMENT OF THE PCM/TCM. AFTER THE ADAPTIVE VALUES ARE RESET, THE TRANSMISSION COMPUTER ADAPTIVE VALUES MUST BE RELEARNED BY DRIVING IN A PRECISE MANNER TO TEACH THE COMPUTER THE PROPER SOLENOID DUTY AND LINE PRESSURE FOR THE NEW TRANSMISSION/COMPUTER COMBINATION.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of 2011 Kia Souls describe a pattern of powertrain failures across both manual and automatic transmissions. Automatic transmission complaints center on sudden, uncontrolled downshifts trapping vehicles in low gear at highway speeds and limiting them to 30–35 mph. One owner experienced this twice and noted a TSB (Technical Service Bulletin #033) for transmission control module upgrades on pre-August 2010 builds. Manual transmission owners report grinding in 3rd gear progressing to complete gear-selection failure, and one describes all gears responding as reverse. Clutch failures appear early: one at 54,000 miles, another at 72,700 miles on the same vehicle.
Engine issues include repeated thermostat sticking and head gasket failure—some owners on their second head gasket and fourth thermostat before 109,000 miles. A bearing failure caused dangerous tire overinflation; the dealership replaced it under warranty but the owner suspects inferior material or poor lubrication. One vehicle developed a transaxle fluid line leak so severe it became undriveable on the highway, with parts unavailable nationwide.
Other complaints center on uncontrolled RPM surges during stop-and-go traffic, violent vibrations early in ownership, and chronic check engine light cycling that dealerships cannot diagnose. Repair costs when covered out-of-pocket run high—one clutch replacement totaled $1,445.
Same Kia Soul powertrain reports on nearby years: 2012 · 2013 · 2014
Failure modes owners describe
Sudden unintended downshifts and limp mode
Transmission drops into low gear without driver input while cruising, trapping vehicle in 2nd/3rd gear with speed limited to 30–35 mph. Issue recurs intermittently after vehicle sits overnight and resumes normal operation briefly.
When: At 56,000 miles; built June 2010, transmission control module upgraded October 2010 per TSB
Symptoms owners cite: Sudden drastic downshift at highway speed (65 mph); Vehicle will not shift past 2nd or 3rd gear; Limp mode limiting speed to 30–35 mph; Transmission resumes normal operation after parking overnight; Recurs after brief normal operation
Recalls/TSBs owners mention: Kia TSB #033 addresses TCM upgrade for transmissions built prior to August 2010
Uncontrolled RPM surge during low-speed stop-and-go traffic
Engine RPMs suddenly spike to near 2000 rpm with no accelerator input, typically in rush-hour creeping (8–15 mph) during light braking and acceleration cycles. Vehicle lurches forward against firm brake pedal; only remedy is turning engine off and restarting. Dealership finds no codes or fault.
When: After first year of ownership; complaint notes approximately 10 occurrences over 2.5 years
Symptoms owners cite: RPMs spike to ~2000 without throttle pressure; Vehicle lurches forward against brakes; Occurs during slow-and-go rush hour traffic; Tapping accelerator does not reduce RPMs; Only reset is turning engine off and restarting
Repairs/costs cited: Dealership inspected 2–3 times; no fault found
Bearing failure causing tire overinflation
Defective wheel bearing causes tire to heat and self-inflate. After 200 miles of highway driving, left tire pressurized to dangerous levels (44–46 psi). Bearing was replaced under warranty at dealer; owner suspects inferior material or improper lubrication/packing.
When: Occurred over multi-day highway trip; bearing failure diagnosis and replacement under warranty
Symptoms owners cite: Left tire inflates to dangerous 44–46 psi; TPMS warning light illuminates; Tire heats under normal driving conditions; Pressure recurs repeatedly over 525-mile trip
Repairs/costs cited: Left wheel bearing replaced at no charge under warranty; no prior accident or service damage noted
Recalls/TSBs owners mention: Bearing replacement covered under warranty
Head gasket and thermostat failures
Multiple failures of head gaskets and thermostats before 109,000 miles, with thermostat sticking closed and causing engine overheating. Owner reports 2 head gaskets and 4 thermostats replaced; failures occur every 20,000 miles or so. Dealerships acknowledge this is common for Souls despite claiming it is not normal.
When: At 109,000 miles; failures repeating approximately every 20,000 miles
Symptoms owners cite: Engine overheating during freeway and local driving; Thermostat sticks closed; No engine warning light on 2 of 4 failures; Temperature gauge showed overheat only 2 of 4 times
Repairs/costs cited: 2 head gaskets and 4 thermostats replaced; regular maintenance completed
Right-side axle shaft seal leak
Right axle shaft leaking; dealer quoted $650 for replacement parts and labor. Warranty denial at 60,000 miles despite vehicle having only approximately 55,000–60,000 miles at time of complaint. Dealer noted part availability was extremely limited for this model year.
When: Discovered at approximately 60,000 miles
Symptoms owners cite: Right axle shaft leaking
Repairs/costs cited: Dealer quote: $650 for parts and labor; part not readily in circulation
Recalls/TSBs owners mention: Warranty denied; powertrain warranty covers 60,000 miles or 60 months for subsequent buyers
Transmission grinding and gear engagement failure
Manual transmission exhibits hard engagement and grinding in 3rd gear; progresses to complete inability to engage 1st or Reverse at 100,000 miles. Owner forced to shift into 5th gear on highway ramp after losing 1st gear.
When: At 80,000–100,000 miles; problem reported as common for this generation
Symptoms owners cite: 3rd gear hard to engage and grinds; Cannot get into 1st or Reverse at 100,000 miles; Forced to shift into 5th on highway ramp
Cruise control power loss and transmission fluid degradation
While cruise control engaged at 75 mph, vehicle loses power. Problem persists after transmission fluid drain and refill. Check engine light illuminates on failure recurrence.
When: At 40,000 miles
Symptoms owners cite: Power loss during cruise control operation at 75 mph; Check engine light illumination on recurrence; Problem recurs after transmission fluid replacement
Repairs/costs cited: Transmission fluid drained and replaced at dealership; issue recurred
Reverse-only or multi-gear reverse condition
Five-speed manual shifts into Reverse when 1st gear is selected at traffic light; all gear selections result in reverse operation. Issue intermittent but persistent across multiple drivers of same vehicle. Vehicle required towing because it could not be moved in forward gear.
When: Complaint does not specify mileage or timing
Symptoms owners cite: All gears respond as Reverse; Unable to shift into 1st gear; Occurs intermittently; Affects multiple drivers
Repairs/costs cited: Vehicle towed to dealer
Clutch and flywheel premature wear
Clutch and flywheel failed twice on manual transmission: first failure at 54,029 miles, second failure less than six months later at 72,735 miles. Owner reports reading online that Kia uses a slave cylinder valve that causes slipping; dealership confirmed slipping on takeoff on second occurrence.
When: First failure: 54,029 miles (1/17/17); second failure: 72,735 miles (12/28/18)
Symptoms owners cite: Clutch slipping on takeoff; Complete clutch failure requiring replacement
Repairs/costs cited: First replacement: $1,445.79; second replacement cost not specified
Check engine light and thermal issues
Check engine light cycles on and off despite dealer stating no fault codes exist. Engine odor suggests burning; vehicle runs hotter than normal. Dealership refuses service due to no active recall announcements.
When: Complaint does not specify mileage or timing
Symptoms owners cite: Check engine light illuminates intermittently; Light turns off unpredictably despite no repair; Burning smell from engine; Vehicle runs excessively hot; No fault codes detected by dealer
Violent shutter vibration on acceleration
Vehicle experiences violent shutter or vibration sensation felt like a blown passenger tire. Issue has recurred four times within first 1,000 miles across various speeds (40–70 mph). At higher speeds, vibration makes vehicle difficult to control. Tires inspected and appear normal.
When: First occurrence: 30 miles (off lot); recurred 4 times total by 1,000 miles
Symptoms owners cite: Violent shutter/vibration resembling blown tire; Occurs at 40–70 mph; Recurs intermittently; Vehicle control difficult at higher speeds; Tires visually normal
Automatic transaxle fluid line leak
Automatic transmission fluid line leaks at rapid rate, rendering vehicle undriveable. Check engine light delayed in illuminating until vehicle became unsafe on highway. Parts availability severely limited nationwide with potential backorder status.
When: Complaint timing not specified; discovered on highway when vehicle became unsafe
Symptoms owners cite: Rapid fluid leak from transaxle line; Vehicle undriveable due to fluid loss; Check engine light delayed illumination; Unable to safely shift gears on highway; Part availability severely limited nationwide
Repairs/costs cited: Part on backorder; availability limited nationwide
Synthesized from 13 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
The clutch has gone out twice . The first time was at 54029 and date of 1/17/17. Less than six months later I took it back to the dealership and told them that it was slipping on takeoff. They said that everything was fine. This time it 72735 and date of 12/28/18 . The bill for the first time was 1445.79 . It is rediculous that it goes out so soon. I have read on line that Kia uses a valve on the…
Had powertrain trouble with your 2011 Kia Soul?
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 2011 Kia Soul?
It's a meaningful issue. 13 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 11 complaints that reported odometer mileage, most powertrain failures cluster between 22,791 and 80,000 miles, with the median around 40,000. A quarter of owners report trouble before 22,791; 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/2011/Kia/Soul.
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.