2020-2023 Hyundai Palisade Brake Noise: Squeal, Grinding and Pulsation Causes

By Core Brake Parts Tech Team — Circleville, OH warehouse

Most brake noise on a 2020-2023 Hyundai Palisade falls into three buckets: a high-pitched squeal (usually the pad wear indicator, dry or tired hardware, or glazed pads), a grinding sound (pads worn to the backing plate, rust, or debris), and a pulsing pedal or shaking wheel (uneven rotor thickness, not a "warped" rotor). The fix is almost always pads, rotors and hardware on the noisy axle, done correctly, with the rear electronic parking brake put into service mode first.

How the Palisade Brake System Works

The 2020-2023 Palisade (Hyundai's LX2 generation) uses disc brakes at all four corners. The front calipers are floating designs held on guide rod bolts. The rear calipers also carry the Electronic Parking Brake (EPB) actuator, a small motor on the back of each rear caliper that drives the piston out when you pull the parking brake switch.

That EPB matters for noise diagnosis in two ways. First, Hyundai's owner information warns not to drive with the EPB applied because it can cause excessive pad and rotor wear, so a rear brake that sounds like it is dragging should be checked for a parking brake that is not fully releasing. Second, the rear pistons cannot simply be pushed back with a C-clamp: the Hyundai service procedure puts the EPB into Brake Pad Replacement Mode with a scan tool before the job, then re-engages it afterward.

Squeal: What the Sound Is Telling You

A squeal is a high-frequency vibration between the pad, the caliper and the rotor. On a Palisade, run through these causes in order:

• Wear indicator contact. Hyundai states that when pads are worn you may hear a high-pitched warning sound from the front or rear brakes, which may come and go or occur every time you press the pedal. It is designed to be annoying. If you hear it, measure the pads.
• Tired or missing hardware. Power Stop notes that spring-loaded pad clips lose tension over time and can cause squealing, which is why they recommend replacing clips at every brake service. Reusing the old clips with a new set of pads is a common source of "my new brakes squeal."
• Dry contact points. Pad backing plate ears and guide pins need a thin coat of brake lubricant. When they run dry, the pad cannot slide freely and it vibrates. Never put lubricant on the friction surface.
• Glazing. Pads and rotors that have been overheated develop a hard, shiny surface that squeaks, especially when hot. On a three-row SUV this often follows long mountain descents, towing, or a stuck rear caliper.
• Skipped break-in. Power Stop lists an insufficient or skipped break-in procedure as a direct cause of noise on new brakes. New pads need to lay an even film of material on the rotor.

Some owners and technicians also report a light squeak from the Palisade rear brakes on application that responds to updated rear pad shims. Quality replacement pads that ship with multi-layer shims and fresh hardware address the same issue.

Grinding: Stop Driving Soon

Grinding is metal on metal, or something hard trapped between pad and rotor. Common causes:

• Pads worn past the limit. Once the friction material is gone, the steel backing plate cuts into the rotor. The rotors will need replacement at that point.
• Rust after sitting. A light grind on the first few stops after rain or a few days parked is surface rust being wiped off the rotor, and is normal if it goes away quickly.
• A stone or debris caught between the rotor and the dust shield, which produces a constant scraping even when you are not braking.
• A dragging rear caliper or EPB that is not releasing, which wears the rear pads down much faster than the fronts.

Hyundai's guidance is plain: do not continue to drive with worn brake pads, and always replace pads as complete front or rear axle sets.

Palisade Pad Thickness Specs

If either pad on an axle is at or near the service limit, replace the full axle set.

Pulsation: It Is Usually Not a Warped Rotor

A pedal that pulses, or a steering wheel that shakes when you brake from highway speed, comes from disc thickness variation (DTV). Wagner's technical guidance explains the chain: lateral runout (the rotor wobbling side to side as it turns) lets the pad touch one area of the rotor more than the rest. With semi-metallic pads that wears thin spots into the rotor; with ceramic pads it deposits extra pad material in spots. Either way the rotor ends up thicker in some places, and as those spots pass through the caliper they push the pistons back and forth, which you feel in the pedal.

Wagner notes most vehicles have lateral runout specifications of two thousandths of an inch or less, so small installation mistakes matter. The most common ones:

• Rust or scale left on the hub face under the rotor
• Lug nuts tightened unevenly, or run on with an impact gun instead of a torque wrench in a star pattern
• Skipping the break-in, which leaves an uneven layer of pad material
• Holding the brakes hard at a stop right after a hot, heavy stop, which can imprint pad material onto the rotor

Once DTV is present, new rotors (or properly machined ones that stay above minimum thickness) plus new pads are the fix. New pads on a rotor with thickness variation will keep pulsing.

Rule Out the Recalls First

Two Palisade recalls involve the brake system. Neither is a noise problem, but both deserve a check if your pedal feels wrong:

• NHTSA 21V-840 (2021 Palisade): brake fluid may be contaminated, causing the master cylinder inner cup seals to swell and reduce braking performance. Dealers replace the master cylinder and flush the fluid free of charge.
• Hyundai Safety Recall 245 (2023 Palisade): certain vehicles built between 04/28/2023 and 05/11/2023 have brake booster housings that can let the diaphragm unseat, causing a vacuum leak and loss of power brake assist.

A hissing sound when you press the pedal, or a suddenly hard pedal, points toward the booster rather than pads and rotors. Enter your VIN at nhtsa.gov or with a Hyundai dealer to see whether either applies.

The Fix and What to Replace Together

For squeal, grinding or pulsation on one axle, the durable repair is pads, rotors and hardware on that axle:

• Pads: ceramic pads are the quietest, lowest-dust choice for a daily-driven Palisade. We carry Power Stop front ceramic brake pads for the 2020-2023 Palisade and Telluride, with more options in our ceramic brake pads collection.
• Rotors: if the old rotors are grooved, below minimum thickness or causing pulsation, replace them. Browse brake rotors.
• Hardware: new clips and a fresh coat of lubricant on the slide points. See brake hardware kits.
• Fluid: old fluid does not cause noise, but a brake job is the right time to check its condition and flush it with the fluid type listed in your owner's manual.

How Hard Is the Job?

Front pads and rotors on a Palisade are a straightforward driveway job for someone with a jack, stands, a torque wrench and basic hand tools. Torque the caliper guide rod bolts and carrier bolts to the values in the factory service manual.

The rear is harder because of the EPB. The Hyundai procedure uses a scan tool to put the system into Brake Pad Replacement Mode (release) before you disconnect the actuator and retract the piston, then returns it to apply mode and cycles the parking brake three times after the job. Forcing the piston back without doing this can damage the actuator. If you do not have a scan tool with EPB functions, have a shop do the rear axle. Finish either axle with the pad maker's break-in procedure.

Frequently Asked Questions

Why do my new Palisade brakes squeal?

The usual causes are reused pad clips, dry slide and contact points, or a skipped break-in. Install new hardware, lubricate the backing plate contact points, and perform the pad maker's bedding procedure.

Is a clicking sound from the rear of my Palisade normal?

A brief whirr or click when you apply or release the electronic parking brake is the EPB motor working. A scraping or grinding while driving is not normal.

Can I push the rear caliper piston back with a C-clamp?

Not until the EPB has been released into service mode with a scan tool. The rear piston is tied to the EPB actuator, and the Hyundai procedure requires that step first.

Do I need new rotors when I replace the pads?

Replace them if they are grooved, below minimum thickness, or causing pedal pulsation. If they are smooth and in spec they can be reused, though new rotors paired with new pads give the most even break-in.

Does the Palisade use the same brake pads as the Kia Telluride?

The 2020-2023 Palisade and Telluride share a platform, and many pad sets are listed for both. Always confirm fitment for your exact year and trim before ordering.

Sources

1. Hyundai Owner's Manual - Disc brakes wear indicator - high-pitched wear warning sound, replace pads as axle sets
2. Hyundai Palisade LX2 manual - Electronic Parking Brake - do not drive with EPB applied, excessive pad and rotor wear
3. Hyundai Palisade LX2 service information - Brake Pad - pad thickness specs, rear EPB pad replacement mode
4. Wagner Brake - Brake Pedal Pulsation and Disc Thickness Variation - runout, DTV, hub cleaning, lug torque
5. Power Stop - Causes and Solutions for Squealing Brake Pads - clips, lubrication, break-in, glazing
6. NHTSA Recall 21V-840 - 2021 Palisade brake fluid contamination and master cylinder remedy
7. Hyundai Safety Recall 245 - 2023 Palisade brake booster diaphragm, production dates