2019-2020 Hyundai Nexo Strut Diagnosis: Noises, Leaks, and Replacement Costs

Symptoms of a Failing 2019-2020 Hyundai Nexo Strut

Since the Hyundai Nexo is a quiet hydrogen fuel cell vehicle, suspension noises that might be masked by engine sound in a traditional car are often more noticeable. When a strut begins to fail, it will provide several distinct clues.

Noises and Vibrations

• Clunking or Knocking: A deep 'clunk' or 'knock' sound when driving over bumps, potholes, or uneven pavement is a classic sign of a worn strut. This is often caused by excessive internal wear, allowing components to move and hit each other.
• Rattling: A rattling noise from a corner of the vehicle can indicate a problem with the strut mount or other related suspension components like sway bar links.
• Popping or Binding: If you hear a 'popping' or 'twang' sound when turning the steering wheel at low speeds, it often points to a worn or binding strut bearing. This bearing allows the entire strut assembly to pivot as you steer.

Changes in Ride and Handling

• Excessive Bouncing: After hitting a bump, a vehicle with bad struts will continue to bounce up and down instead of settling quickly. This indicates the internal shock absorber part of the strut has lost its ability to dampen impacts.
• Nose-Diving and Squatting: If the front end of your Nexo dips excessively when you brake, or the rear end squats when you accelerate, the struts are likely worn out and failing to control the vehicle's weight transfer.
• Swaying or Body Roll: A feeling of instability or excessive leaning during turns, especially at moderate speeds, suggests the struts are no longer providing adequate support.

Visual Signs

• Fluid Leaks: Struts are filled with hydraulic fluid. If you see oily fluid leaking down the side of the strut body, it is definitively bad and must be replaced.
• Uneven Tire Wear: Worn struts can cause a specific pattern of tire wear called 'cupping,' which appears as scalloped dips around the edge of the tire tread. This happens because the tire is bouncing as it rolls down the road.

Known Issues, TSBs, and Recalls

As of late 2024, there are no active recalls from the National Highway Traffic Safety Administration (NHTSA) for the struts or suspension on the 2019-2020 Hyundai Nexo. Numerous recalls exist for the vehicle's fuel system and electronic brakes, but none address the suspension components.

A Technical Service Bulletin (TSB), number 20-SS-001H (NHTSA Item Number: 10172142), was issued for the 'SUSPENSION' on the 2019 Nexo. However, the specific details and remedies covered by this TSB are not publicly available. It does not necessarily indicate a widespread defect.

Buying a Used 2019-2020 Nexo Strut

For the Hyundai Nexo, buying a used OEM strut is often the most practical and cost-effective option. Aftermarket manufacturers have not produced struts for this niche vehicle, leaving only two choices: expensive new OEM parts from a dealer or recycled OEM parts.

A quality used OEM strut offers the same fit, performance, and durability as a new one, but at a significantly lower cost. Here’s what to look for when buying used:

• Verify Part Numbers: Ensure the part number matches your vehicle's needs. The primary front strut numbers are 54650-M5100 (Left) and 54651-M5000 / 54651-M5100 (Right). Always confirm compatibility with the seller using your vehicle's VIN.
• Check for Leaks: The most important inspection is for fluid leaks. The strut body should be dry. Any sign of oily residue or wetness means the strut's internal seals have failed, and the part is useless.
• Inspect the Rod: The chrome-plated rod that extends from the top of the strut should be smooth, straight, and free of rust, pitting, or damage. Any imperfections will quickly destroy the new seal and cause it to leak.
• Examine the Body: Look for major dents in the strut body. While minor scuffs are okay, a significant dent can interfere with the internal piston's movement, ruining the strut.
• Mileage and Condition: Ask the seller for the mileage of the donor vehicle. A strut from a low-mileage Nexo (under 50,000 miles) is an excellent candidate. Avoid parts from high-mileage vehicles, as they will have limited service life remaining.

Cost to Replace Hyundai Nexo Struts

Replacing struts on a Nexo involves costs for parts and labor. Since aftermarket options are not available, the choice is between new OEM and used OEM parts.

Replacement Procedure Overview

Replacing a strut is a job for an experienced DIYer or a professional mechanic. It requires specialized tools, including a strut spring compressor, which can be very dangerous if used improperly.

The general steps for replacing a front strut on a similar Hyundai vehicle include:

1. Lifting and supporting the vehicle safely on jack stands.
2. Removing the front wheel.
3. Disconnecting the sway bar link, ABS sensor wire, and brake line bracket from the strut.
4. Removing the two large bolts that connect the bottom of the strut to the steering knuckle.
5. Removing the three smaller nuts on the strut tower in the engine bay that hold the top of the strut.
6. Removing the strut assembly from the vehicle.
7. Using a spring compressor to safely compress the coil spring, allowing for the removal of the top nut and strut mount.
8. Transferring the spring and mount to the new strut and reassembling.
9. Installing the new strut assembly in the reverse order of removal.

A torque wrench is essential to tighten all bolts to manufacturer specifications to ensure safety and proper function.

Related Parts to Consider Replacing

When replacing struts, it's wise to inspect and often replace related components that wear at a similar rate or must be removed during the job.

• Strut Mounts: These rubber and metal mounts at the top of the strut absorb impacts and can wear out, causing noise and alignment issues.
• Strut Bearings: This bearing sits atop the strut and allows it to pivot when steering. A worn bearing will cause a binding or popping noise.
• Sway Bar Links: These connect the sway bar to the strut. They are a common source of clunking noises and are inexpensive to replace at the same time.
• Dust Boots & Bump Stops: These protect the strut rod and prevent it from bottoming out. They often degrade and should be replaced if not included with the new strut.

Frequently Asked Questions (FAQ)