my Genesis G70 IG (2017-2023) brakes pulsate when I stop, what causes this?

Genesis G70 IG (2017-2023)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

526 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix pulsating brakes on Genesis G70 (2017-2023). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is securely supported on jack stands before working underneath it.
•Always allow the brake components to cool before handling.

Symptoms

•Pulsating brake pedal when applying brakes
•Possible vibration felt in the steering wheel
•Uneven braking performance
•Increased stopping distance
•Potential noise during braking (e.g., grinding or squeaking)

Diagnostic Steps

1
Inspect brake rotors for warping or uneven wear using a dial indicator.
2
Check brake pads for thickness and uneven wear patterns.
3
Look for any signs of contamination on the brake pads and rotors (oil, grease, or debris).
4
Examine the brake calipers for proper operation and seize.
5
Assess the brake fluid level and quality; check for moisture contamination.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Socket set
•Torque wrench
•Dial indicator
•Brake cleaner
•Brake grease
•C-clamp
•Brake bleeder kit

Parts Required

•New brake rotors
•New brake pads

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Diagnostic Steps

1
Inspect brake rotors for warping or uneven wear using a dial indicator.
2
Check brake pads for thickness and uneven wear patterns.
3
Look for any signs of contamination on the brake pads and rotors (oil, grease, or debris).
4
Examine the brake calipers for proper operation and seize.
5
Assess the brake fluid level and quality; check for moisture contamination.

Solution

1. Preparation

Gather required tools and parts.
Ensure the vehicle is on a level surface and secure it with wheel chocks.
Raise the vehicle using a jack and secure it on jack stands.

2. Remove Wheels

Using a socket set, loosen the lug nuts, then remove the wheels to access the brake components.
Tools Required: Socket set, lug wrench.

3. Inspect and Replace Brake Rotors

Inspect Rotors: Use a dial indicator to measure rotor runout. If warping exceeds manufacturer specifications, replace the rotors.
Remove Rotors: Unbolt the caliper from the bracket and suspend it using a bungee cord. Remove the rotor by unscrewing any retaining screws or simply pulling it off if it’s not stuck.
Install New Rotors: Place the new rotor onto the hub, ensuring it sits flush. Reattach retaining screws if applicable.
Tools Required: Torque wrench, dial indicator, brake cleaner.

4. Inspect and Replace Brake Pads

Inspect Pads: Check for wear; if pads are unevenly worn or below minimum thickness, replace them.
Remove Pads: Slide the brake pads out of the caliper bracket.
Install New Pads: Apply brake grease on the back of the new pads to reduce squealing. Slide them into the caliper bracket.
Tools Required: Brake grease, C-clamp (to compress caliper piston).

5. Reassemble and Bleed Brake System

Reattach the caliper over the new pads and torque bolts to manufacturer specifications.
Reinstall the wheels and lower the vehicle.
Bleed the brake system to ensure there are no air bubbles in the lines.
Tools Required: Brake bleeder kit.