On 11/23/15 I was driving down 85s when I hit something in the road. Had to pull over cause it sounded like the bottom of my car fell out. After waiting 2hrs for help we nticed that the driveshaft (2part shaft) broke off, punctured my gas tank, my cable that runs to my transmission and put a good size hole in the bottom of my back seat. The shop told me that this a reoccuring problem with this…
2006 Kia Sorento powertrain problems
moderate 22 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
22
Recalls
0
Avg fix
$2,500
When does it fail?
Of the 22 powertrain complaints filed for the 2006 Kia Sorento, here's the actual mileage breakdown — failures cluster heaviest at 150,000+ 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 10 years — the issue may be aging out of the active population.
The failure pattern owners describe
The dominant complaint is crankshaft bolt shear, which occurs at mileages between 60,000 and 91,000 miles. Owners describe loud engine noises followed by immediate loss of power steering and engine shutdown. The bolt break allows the harmonic balancer to come loose, causing the serpentine belt to slip off. Several owners report the failure happening within weeks or months after timing belt service—one owner had the bolt break twice on the same vehicle, the second time just two months after a $1,800+ repair.
Multiple owners note the failure is particularly dangerous on highways at high speed; one lost power steering at 75 mph on an interstate. Some owners cite a 2017 Kia class action settlement regarding this bolt issue and report a Technical Service Bulletin instructing dealerships to replace the bolt during timing belt service, though this was not consistently done. Repairs range from $1,800 to $3,700 when engine damage occurs.
Secondary issues include driveshaft breakage that punctured fuel tanks and severed transmission cables, clutch pedal sticking and rapid wear (some failing every 14,000 miles), rear differential clunking that persisted even after replacement, and premature brake rotor wear requiring replacement as early as 18,000 miles. Electrical gremlins include intermittent brake light and interior light failures despite bulb and fuse replacement.
Same Kia Sorento powertrain reports on nearby years: 2005 · 2007 · 2008
Failure modes owners describe
Crankshaft bolt shear / harmonic balancer failure
Crankshaft bolt breaks or shears off, often causing the harmonic balancer to come loose or fail. This typically causes the serpentine belt to come off its track or slip, leading to loss of power steering and engine power. The failure frequently occurs shortly after timing belt service when the bolt was supposedly replaced, suggesting improper installation or a design defect.
When: 70,000 miles; 82,290 miles; repeatedly within 2 months of timing belt service; 60,000 miles; 91,000 miles; at 75 mph on interstate
Symptoms owners cite: loud rumbling or clunky noise from engine; loss of power steering; engine shuts off or stalls; belt falls off or misaligns; power steering becomes difficult or impossible; loud screeching noise; vehicle jerks and decelerates suddenly; brake and battery lights on dash; brake lights hard to apply
Repairs/costs cited: Crank bolt replacement; harmonic balancer replacement; damper pulley replacement; crank sprocket replacement; timing belt, tensioner, and crankshaft bolt replacement; in some cases, entire engine replacement cited ($3,200 to $3,687.71); one owner faced $1,800+ repair in March 2014, then identical failure September 2014
Recalls/TSBs owners mention: KIA stated in some cases that bolt failure is not covered under warranty despite powertrain warranty to 100,000 miles. Owner references 2017 class action settlement regarding crankshaft bolt issue. KIA previously issued recalls on older models for same part. TSB memo reportedly issued to dealerships to replace bolt when replacing timing belt, but not consistently followed.
Driveshaft breakage
Driveshaft breaks or separates while driving, causing severe secondary damage including punctured fuel tank, severed transmission cable, and holes in vehicle structure.
When: 11/23/2015, after hitting object in road
Symptoms owners cite: loud sound like bottom of car fell out; vehicle shaking once over 30 mph (prior symptom on same vehicle); driveshaft broken off
Repairs/costs cited: Driveshaft is two-part and broke off; secondary damage included punctured gas tank, severed transmission cable, hole in back seat; shop stated this is a recurring problem with this vehicle type
Clutch pedal sticking / manual transmission clutch failure
Clutch pedal depresses and sticks to the floor, or clutch wears unevenly and rapidly. One owner reported clutch wearing on one side and failing every 14,000–15,000 miles. Another reported clutch not engaging properly after depression.
When: 20,000 miles; early in ownership; at 45,923 miles with repeated failures every 14,000–15,000 miles
Symptoms owners cite: clutch pedal depresses and sticks to floor; clutch not engaging; smoking and vehicle stops moving at 45 mph; need to tap pedal to release, sometimes ineffective
Repairs/costs cited: Vehicle towed four times for clutch failure. Dealer stated normal wear, but uneven wear on one side. Manufacturer no longer made 5-speed transmission for this model.
Rear differential clunking and locking
Clunking sound in rear end when stopping and starting. Rear differential replaced in August 2005, but clunk persisted. Intermittent sound suggests differential sticking or locking into positive traction, causing one tire to sound and feel like it is sliding on gravel. Previous owner reported same problem.
When: As of October 2005; replaced August 2005 but problem remained
Symptoms owners cite: clunking sound in rear end at complete stop and restart; intermittent sound in rear end; one tire sounds and feels like sliding on gravel
Repairs/costs cited: Rear differential replaced August 2005
Brake light and interior light failures
Brake lights and interior lights stop working or malfunction. Bulbs and fuses replaced but lights do not function. One owner replaced brake light bulbs multiple times; another had interior lights non-functional since purchase.
When: Early in ownership; at 190,000 miles; recurring throughout ownership
Symptoms owners cite: brake lights not illuminating intermittently or completely; interior lights not working; bulb requires replacement at least once per month
Codes mentioned: NHTSA Campaign 09V130000 (Exterior Lighting)
Repairs/costs cited: Bulbs and fuses replaced but issue persisted in some cases; one recalls recall 09V130000 but was told VIN not included
Recalls/TSBs owners mention: Manufacturer stated one VIN was not included in recall campaign 09V130000 (Exterior Lighting). One owner cited recall #SC077 for brake and interior lights.
Gear shift lever failure
Gear shift comes off while driving. Two screws and a spring popped off at very low mileage, requiring owner to push metal bar to shift gears.
When: 1,200 miles
Symptoms owners cite: gear shift came off; screws and spring popped off; manual shifting required by pushing metal bar
Engine overheating and failure
Engine overheated on highway and would not run. Subsequent inspection and repair involved replacement of engine, coils, wires, plugs, timing components, cam and crank sensors, fuel tank cleaning, and fuel pump replacement.
When: November 2015; repair 03/30/2016–05/23/2016
Symptoms owners cite: overheated on highway; engine would not run
Repairs/costs cited: Engine replacement $3,687.71; multi-point inspection, coil/wire/plug replacement, timing belt/crank and cam sensor replacement, fuel tank cleaning, fuel pump replacement $2,995; vehicle had to be towed
Brake rotor premature wear
Front brake rotors require replacement at very low mileages and wear out repeatedly.
When: 18,000 miles; 26,000 miles; needs replacement again at 30,000 miles
Symptoms owners cite: brake rotor wear requiring replacement
Repairs/costs cited: Front rotors replaced at 18,000 and 26,000 miles; replacement needed again at 30,000 miles
Synthesized from 22 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Had powertrain trouble with your 2006 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 2006 Kia Sorento?
It's a documented issue but not catastrophic. 22 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 22 complaints that reported odometer mileage, most powertrain failures cluster between 56,243 and 99,000 miles, with the median around 85,000. A quarter of owners report trouble before 56,243; a quarter make it past 99,000. 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/2006/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.