why does my Genesis G70 shake when I brake hard

Genesis G70 1st Gen (2018-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

509 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 brake shaking in Genesis G70. 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

•Allow the brakes to cool before working on them.
•Always use jack stands; never rely solely on a jack.

Symptoms

•Vibration in the steering wheel during hard braking
•Shaking of the vehicle chassis
•Pulsating brake pedal feel
•Increased stopping distance
•Uneven tire wear

Diagnostic Steps

1
Inspect brake rotors for warping or scoring using a micrometer.
2
Check brake pad thickness and condition for wear.
3
Examine suspension components (control arms, bushings, etc.) for signs of wear or damage.
4
Verify wheel alignment and balance.
5
Test brake fluid quality and level.

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

•Lug wrench
•Jack
•Jack stands
•Torque wrench
•Impact wrench (optional)
•Brake cleaner
•Brake pad spreader

Parts Required

•Brake rotors
•Brake pads

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Solution

1. Preparation

Gather tools and safety equipment.
Ensure the vehicle is parked on a level surface, and engage the parking brake.
Wear safety glasses and gloves.

2. Remove Wheel

Tools Required: Lug wrench, jack, jack stands.
Sub-steps:
1. Loosen lug nuts slightly while the wheel is still on the ground.
2. Use the jack to lift the vehicle and place jack stands for support.
3. Fully remove the lug nuts and take off the wheel.

3. Inspect and Replace Brake Rotors

Tools Required: Torque wrench, impact wrench (optional), brake cleaner.
Sub-steps:
1. Inspect rotors for warpage using a micrometer. Replace if warping exceeds manufacturer specifications (usually 0.002 inches).
2. If replacing, remove caliper bolts and hang caliper safely to prevent damage.
3. Remove old rotors; clean the hub surface with brake cleaner.
4. Install new rotors, ensuring they are properly seated.
5. Reinstall caliper, torque bolts to manufacturer specifications (typically 25-35 ft-lbs).

4. Inspect and Replace Brake Pads

Tools Required: Brake pad spreader, torque wrench.
Sub-steps:
1. Check brake pads for wear; replace if less than 3mm thickness remains.
2. Remove old pads and clean the caliper carrier.
3. Install new brake pads, ensuring correct orientation.
4. Reinstall caliper, torque bolts as specified.

5. Reassemble and Test

Tools Required: Same tools from previous steps.
Sub-steps:
1. Reinstall the wheel and hand-tighten lug nuts.
2. Lower the vehicle and torque lug nuts to manufacturer specifications (usually 80-100 ft-lbs).
3. Pump the brake pedal to ensure caliper operation.
4. Conduct a test drive to confirm the issue is resolved.