my Genesis G70 shakes when I brake, what are the possible causes?

Genesis G70 1st Gen (2018-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

525 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 issues 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

•Always use jack stands when the vehicle is lifted.
•Allow the engine to cool before working on any components near the exhaust system.

Symptoms

•Shaking or vibration felt in the steering wheel during braking
•Pulsation in brake pedal
•Increased stopping distance
•Uneven wear on brake pads or rotors
•Noise during braking (squeaking or grinding)

Diagnostic Steps

1
Inspect brake rotors for warping or uneven wear using a dial indicator.
2
Check brake pads for wear and ensure they are properly seated in the calipers.
3
Examine suspension components, including control arms and wheel bearings, for any signs of wear or damage.
4
Test brake fluid for contamination or low levels.
5
Check wheel alignment and balance to rule out misalignment issues.

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

•Jack and jack stands
•Lug wrench
•Torque wrench
•Socket set
•Dial indicator

Parts Required

•Brake rotors (if warped)
•Brake pads (if worn)
•Brake fluid (if contaminated)

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Diagnostic Steps

1
Inspect brake rotors for warping or uneven wear using a dial indicator.
2
Check brake pads for wear and ensure they are properly seated in the calipers.
3
Examine suspension components, including control arms and wheel bearings, for any signs of wear or damage.
4
Test brake fluid for contamination or low levels.
5
Check wheel alignment and balance to rule out misalignment issues.

Solution

1. Preparation

Gather tools and parts needed.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the battery (optional, based on model year).

2. Inspect and Replace Brake Rotors

Tools Required: Jack and jack stands, lug wrench, torque wrench, socket set, dial indicator.
Remove the wheel using a lug wrench.
Use a dial indicator to measure rotor runout; replace rotors if warping exceeds specifications.
If rotors are to be replaced, remove caliper bolts and hang caliper using a bungee cord or similar to avoid stress on the brake line.
Remove the rotor from the hub, clean the hub surface, and install the new rotor.
Reattach the caliper and torque caliper bolts to manufacturer specifications.

3. Inspect and Replace Brake Pads

Remove the caliper and old pads.
Inspect the caliper for sticking or uneven wear.
Replace pads with high-quality replacements, ensuring proper fit and alignment.
Reinstall caliper and torque to specifications.

4. Check and Repair Suspension Components

Tools Required: Socket set, pry bar, torque wrench.
Inspect control arms, bushings, and wheel bearings for play or damage.
Replace any worn or damaged components as necessary, following manufacturer specifications for torque and assembly.

5. Brake Fluid Check and Replacement

Inspect brake fluid level in the master cylinder reservoir.
If fluid is contaminated or low, bleed the brake system and refill with manufacturer-recommended fluid.
Ensure all air is purged from the system for optimal braking performance.