2018-2025 Stinger & G70 Steering Knuckle Guide: Decoding AWD, RWD, and Brembo Variants

A Critical Compatibility Warning for G70 & Stinger Owners

Before buying a steering knuckle for a 2019-2025 Genesis G70 or a 2018-2023 Kia Stinger, it is critical to understand that multiple versions exist and they are NOT interchangeable. These vehicles were offered with both Rear-Wheel Drive (RWD) and All-Wheel Drive (AWD), as well as with standard brakes or optional high-performance Brembo brakes. Each of these four configurations uses a unique steering knuckle. Installing the wrong one will result in incorrect suspension geometry, improper brake caliper mounting, and an unsafe vehicle.

Symptoms of a Failing Steering Knuckle

While steering knuckles are very durable, they can fail, typically from a major impact like hitting a curb or a large pothole, or in rare cases, from a manufacturing defect. A worn-out wheel bearing, which is pressed into the knuckle, can also produce similar noises. Here are the common signs of a bad steering knuckle:

• Clunking or Popping Noises: A 'clunk', 'pop', or 'creak' sound from the front suspension, especially during low-speed turns 🎬 Watch: Hear what a failing knuckle sounds like during turns like pulling into a parking spot, is a common symptom. While this can also be caused by bad ball joints or sway bar links, it warrants an inspection of the knuckle.
• Grinding or Squealing While Turning: A metallic grinding or squealing noise that changes with wheel rotation can indicate a failed wheel bearing housed within the knuckle.
• Vehicle Pulling to One Side: If the knuckle is bent, it will throw off the wheel alignment permanently. The car may persistently pull to one side even after an alignment has been performed.
• Uneven Tire Wear: A bent knuckle changes the camber angle (the inward or outward tilt of the top of the tire). This will cause rapid and uneven wear on the inside or outside edge of one tire.
• Vibrating or Loose Steering Wheel: Excessive play or vibration in the steering wheel can be a sign of a worn wheel bearing or a loose connection at the knuckle.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

While these models have not had widespread knuckle failures, there are a few official notices and common complaints to be aware of.

• Kia Steering Knuckle Recall (Canada): On certain vehicles, Kia issued a recall for a left-front steering knuckle that could crack or break. The fix involves inspecting a batch code on the knuckle and replacing it if it falls within the affected range. This makes a physical inspection of a used part for cracks especially important.
• Steering Rack (MDPS) Recall: Some 2020 Genesis G70 and 2020 Kia Stinger models were recalled for an issue with the Motor Driven Power Steering (MDPS) assembly, which could cause steering to become difficult or lock up. This is a problem with the steering rack, not the knuckle, but produces steering-related symptoms.
• No Specific TSBs for Knuckle Failure: As of early 2026, there are no major TSBs issued for widespread steering knuckle failure on these models. Most steering-related TSBs concern the electronic power steering system or alignment issues related to tire sizes on AWD models.

Decoding Part Numbers: The Definitive Compatibility Guide

The part numbering for G70 and Stinger knuckles can be confusing. Unlike many other Hyundai/Kia models, they use a 51710- prefix for the Left (Driver's) side and a 51711- prefix for the Right (Passenger's) side. The five-digit suffix determines the specific application. Use the table below to find your exact part number.

These part numbers are shared between the Genesis G70 and Kia Stinger for the corresponding model years and configurations.

Buying a Used Steering Knuckle: What to Look For

Given the high cost of a new OEM knuckle, especially for the Genesis G70, a used part from a reputable recycler is an excellent value. Because the knuckle is a solid piece of metal with no moving parts of its own, a low-mileage, undamaged used OEM part is often superior to a cheap, new aftermarket alternative in terms of material quality and precise geometry.

• Physical Inspection is Key: Before purchasing, carefully inspect the entire knuckle for any signs of damage. Look for hairline cracks, especially around the wheel bearing housing and where the control arms and strut mount. Check for any bends or deformation; compare it to photos of a new part if possible.
• Check for Impact Marks: Avoid any knuckle that has obvious scrapes, gouges, or rust-free impact marks, as this indicates it may have been in a collision or suffered a severe pothole strike.
• Verify the Part Number: Cross-reference the part number stamped on the knuckle with the compatibility table above to ensure you are buying the correct version for your car.
• Mileage and Condition: A knuckle from a low-mileage vehicle is ideal. While the knuckle itself doesn't wear out with mileage, the included wheel bearing does. If the used knuckle comes with the wheel hub and bearing, consider the mileage. If it's high (over 80,000 miles), it may be wise to press out the old bearing and install a new one before installation.
🎬 Watch: DIY guide for replacing the front wheel bearing hub
• Why Used OEM is a Smart Choice: The steering knuckle's geometry is critical for alignment. A used OEM part was manufactured to the exact specifications of Genesis/Kia. Some cheap aftermarket knuckles can have slight variations in casting that make achieving a perfect alignment difficult or impossible.

Cost of Replacement: 2018-2025 Stinger & G70

The cost to replace a steering knuckle varies significantly between the Kia Stinger and Genesis G70, primarily due to the price of the OEM part.

Replacement Overview and Torque Specs

Replacing a steering knuckle is an advanced job that requires proper tools and a good understanding of suspension work. It is not recommended for beginners. An alignment is always required after the job is complete.

Related Parts to Inspect/Replace:

• Wheel Bearing/Hub Assembly: It's often wise to replace the wheel bearing at the same time, as it must be pressed out of the old knuckle and into the new one. Many knuckles are sold with a new bearing pre-installed.
• Axle Nut: This is a one-time-use nut and must be replaced. Reusing it can cause it to back off, leading to wheel bearing failure or wheel detachment.
• Ball Joints & Tie Rod Ends: Since you are disconnecting these to remove the knuckle, inspect them for any play or torn boots and replace as needed.

Key Torque Specifications (Kia Stinger):

Always consult a factory service manual for the most accurate specs, but these are commonly cited values.

• Axle Nut (Drive Shaft Nut): 196 - 255 N·m (145 - 188 lb-ft) - Must be staked after torquing.
• Strut-to-Knuckle Bolts: 108 - 122 N·m (80 - 90 lb-ft)
• Tie Rod End Nut: 64 - 74 N·m (47 - 55 lb-ft)
• Lower Arm Ball Joint Nut: 64 - 74 N·m (47 - 55 ft-ft)
• Wheel Lug Nuts: 108 - 127 N·m (80 - 94 lb-ft)

Frequently Asked Questions (FAQ)