2019-2020 Kia Sorento Steering Knuckle: FWD vs. AWD, Noises, and Replacement Costs
This guide covers the critical differences between Front-Wheel Drive and All-Wheel Drive knuckles, how to diagnose failure noises, and what to expect for replacement costs.
- The most critical factor is drivetrain: 2019-2020 Sorentos use different knuckles for Front-Wheel Drive (FWD) and All-Wheel Drive (AWD). Verify before buying.
- Failure is usually caused by impact (bending/cracking) or a worn-out wheel bearing within the assembly, leading to noises, pulling, and uneven tire wear.
- When buying used, the most important check is the condition of the integrated wheel bearing. Spin the hub to feel for roughness or noise.
- A four-wheel alignment is mandatory after replacement to ensure safety and prevent rapid tire wear.
Symptoms of a Failing Steering Knuckle
A steering knuckle is a very durable part, and failure usually results from a major impact (like hitting a curb or deep pothole) or the failure of the integrated wheel bearing. Here are the most common signs that your 2019-2020 Sorento's knuckle may be damaged:
- Clunking or Popping Noises: You may hear a distinct clunk, pop, or grinding sound from one of the front corners, especially during low-speed turns like pulling into a parking spot. This can be caused by a cracked knuckle or, more commonly, a worn-out wheel bearing housed within the knuckle assembly.
- Vehicle Pulling to One Side: A bent steering knuckle will alter the suspension geometry, causing the vehicle to pull to the left or right even when you're trying to drive straight. This often cannot be corrected with a standard wheel alignment.
- Uneven Tire Wear: A primary indicator of a bent knuckle is rapid and uneven wear on the inside or outside edge of one specific tire. This happens because the wheel is no longer being held at the correct angle to the road.
- Steering Wheel Vibration: A shimmy or vibration felt in the steering wheel, especially at highway speeds, can be a sign of a failing wheel bearing within the knuckle assembly or a bent knuckle itself.
- Loose or Vague Steering: The steering may feel less precise, or you might notice excessive play in the steering wheel before the wheels respond.
Known Issues, Recalls, and TSBs for 2019-2020 Kia Sorento
As of mid-2026, there are no specific recalls or Technical Service Bulletins (TSBs) issued by Kia or the NHTSA that directly address the steering knuckle for the 2019-2020 Sorento. While other steering components on different Kia models have been subject to recalls, the knuckle itself has proven to be a reliable part. Most issues reported for this component are related to impact damage or wear on the integrated wheel bearing rather than a manufacturing defect.
CRITICAL: FWD vs. AWD Compatibility
The single most important factor when purchasing this part is verifying your vehicle's drivetrain. The 2019-2020 Kia Sorento uses different steering knuckles for Front-Wheel Drive (FWD) and All-Wheel Drive (AWD) models. They are not interchangeable.
- Front Left (Driver Side) FWD Models Use Part Number: 51715-C5400
- Front Left (Driver Side) AWD Models Use Part Number: 51715-C5500
Always confirm your drivetrain and match the part number before ordering to avoid receiving an incompatible part.
Buying a Used 2019-2020 Sorento Steering Knuckle
A used OEM steering knuckle is an excellent, cost-effective option, especially since the part itself is a simple, robust piece of cast iron. The main item to inspect is the condition of the pre-installed wheel bearing.
What to Inspect on a Used Part:
- Check for Cracks or Bends: Carefully inspect the entire knuckle for any signs of hairline cracks, especially around the mounting points for the strut, ball joint, and brake caliper. A bent knuckle is often impossible to see with the naked eye but will prevent the vehicle from ever aligning correctly. Ask the seller about the donor vehicle's history if possible.
- Spin the Wheel Hub: The knuckle assembly includes the wheel hub and bearing. Grab the hub and spin it by hand. It should rotate smoothly and silently. If you feel any grinding, roughness, or hear a humming noise, the bearing is bad and will need to be pressed out and replaced, adding significant cost and labor.
- Inspect Mounting Holes: Check that the threaded holes for the brake caliper bracket and the mounting holes for the strut are clean and not damaged or stripped.
- Mileage vs. Condition: For the knuckle itself, physical condition is more important than mileage. A low-mileage part from a front-end collision could be bent, while a high-mileage part from a vehicle with no impact history could be perfectly fine. However, for the integrated wheel bearing, lower mileage is always better as it is a wear item.
Cost Comparison
Replacing a steering knuckle can vary in cost depending on the parts source and labor rates. A wheel alignment is required after the job, which adds to the total cost.
| Part/Service | Estimated Cost | Notes |
|---|---|---|
| New OEM (Dealer) | $240 - $400 | This is for the part only, with prices varying by dealer. |
| New Aftermarket | $225 - $350 | Quality can vary. Brands like Dorman are common. |
| Used OEM | $100 - $200 | Offers OEM quality at a lower price. Price depends on condition and included components. |
| Shop Labor | $200 - $400 | Typically 2-3 hours of labor. |
| Wheel Alignment | $100 - $200 | Mandatory after replacing a steering knuckle. |
| Total Professional Job | $500 - $800+ | RepairPal estimates an average cost of $462-$565 for the 2019-2020 Sorento, which may not include alignment. |
Replacement Overview and Torque Specs
Replacing the steering knuckle is an advanced DIY job that requires heavy-duty tools. The process involves disconnecting the entire corner of the suspension.
Related Parts to Inspect:
While the knuckle is removed, it is the perfect time to inspect and, if necessary, replace related wear items. These include:
- Lower Ball Joint
- Outer Tie Rod End
- CV Axle Shaft
- Brake Rotor and Pads
- ABS Wheel Speed Sensor (be careful not to damage it during removal)
Key Torque Specifications:
Using correct torque specifications is critical for safety. Always use a torque wrench for final assembly. While specs can vary slightly, these are commonly cited values for the Sorento platform:
| Component | Torque Value (ft-lbs) | Torque Value (N-m) |
|---|---|---|
| Strut-to-Knuckle Bolts | 101 - 116 | 137 - 157 |
| Lower Ball Joint-to-Knuckle Nut | 72 - 87 | 98 - 118 |
| CV Axle Nut | 155 - 206 | 214 - 279 |
| Tie Rod End Nut | 22 - 33 | 29 - 44 |
| Wheel Lug Nuts | 65 - 87 | 88 - 118 |
Frequently Asked Questions (FAQ)
Does this part fit both Front-Wheel Drive (FWD) and All-Wheel Drive (AWD) models?
No. This is the most common mistake buyers make. The FWD and AWD versions of the 2019-2020 Sorento use different front steering knuckles with unique part numbers. You must verify your vehicle's drivetrain before ordering.
Can I just replace the wheel bearing instead of the entire knuckle assembly?
Yes, but it is a difficult job. The wheel bearing is pressed into the knuckle and requires a hydraulic press and specialized tools to remove and install. If the bearing has seized due to rust, it can be nearly impossible to remove without damaging the knuckle. For many DIY mechanics, replacing the entire used knuckle assembly with a good bearing is faster and easier.
Is a wheel alignment necessary after replacing the steering knuckle?
Yes, absolutely. The steering knuckle is the central component that determines the wheel's alignment angles (camber and toe). Replacing it will change these angles, so a full four-wheel alignment is mandatory to ensure proper handling, safety, and to prevent premature tire wear.
Is this the same part for the driver and passenger side?
No. Steering knuckles are side-specific. The part numbers in this guide are for the Front Left (Driver Side) only. The passenger side knuckle is a different part.
Technical Specifications
OEM Part Numbers: 51715-C5400 (Front Left, FWD) 51715-C5500 (Front Left, AWD) 51715-C5000
Material: Cast Iron. Includes integrated wheel hub and bearing assembly. Specific mounting points for strut, lower ball joint, outer tie rod, and brake caliper.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Kia Sorento:
- 🛍️ Shop This Part
- Symptoms of a Failing Steering Knuckle
- Known Issues, Recalls, and TSBs for 2019-2020 Kia Sorento
- Buying a Used 2019-2020 Sorento Steering Knuckle
- What to Inspect on a Used Part:
- Cost Comparison
- Replacement Overview and Torque Specs
- Related Parts to Inspect:
- Key Torque Specifications:
- Frequently Asked Questions (FAQ)
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