how to tell if my BMW 5 Series G30/G31 (2017-2024) struts are worn out

BMW 5 Series G30/G31 (2017-2024)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

553 words

Problem Statement

The user is seeking guidance on how to identify if the struts on their BMW 5 Series G30/G31 (2017-2024) are worn out.

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always use jack stands when working under the vehicle.
•Ensure the strut spring compressor is used correctly to avoid injury from spring release.

Symptoms

•Vehicle exhibits excessive bouncing after hitting bumps.
•Noticeable leaning or swaying during turns.
•Increased stopping distance or poor braking performance.
•Uneven tire wear, particularly on the inner or outer edges.
•A clunking or knocking noise when driving over rough surfaces.
•The "Check Suspension" warning light illuminated on the dashboard.

Diagnostic Steps

1
Perform a visual inspection of the struts for any signs of leaks or physical damage.
2
Push down on each corner of the vehicle to observe the rebound; it should settle quickly without excessive bouncing.
3
Inspect the tires for uneven wear patterns that may suggest suspension issues.
4
Drive the vehicle over bumps or rough roads and listen for any abnormal noises from the suspension system.
5
Check for any warning lights on the dashboard that may indicate suspension problems.
6
Use a diagnostic scanner to check for any suspension-related trouble codes.

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
•Jack
•Jack stands
•Strut spring compressor

Parts Required

•Replacement struts (front and/or rear, as necessary)
•Strut mounts (if worn)

Related Faults

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Symptoms

•Vehicle exhibits excessive bouncing after hitting bumps.

•Noticeable leaning or swaying during turns.

•Increased stopping distance or poor braking performance.

•Uneven tire wear, particularly on the inner or outer edges.

•A clunking or knocking noise when driving over rough surfaces.

•The "Check Suspension" warning light illuminated on the dashboard.

Diagnostic Steps

1
Perform a visual inspection of the struts for any signs of leaks or physical damage.
2
Push down on each corner of the vehicle to observe the rebound; it should settle quickly without excessive bouncing.
3
Inspect the tires for uneven wear patterns that may suggest suspension issues.
4
Drive the vehicle over bumps or rough roads and listen for any abnormal noises from the suspension system.
5
Check for any warning lights on the dashboard that may indicate suspension problems.
6
Use a diagnostic scanner to check for any suspension-related trouble codes.

Solution

1. Preparation

Tools Required: Socket set, torque wrench, jack, jack stands, strut spring compressor.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to avoid any electrical issues while working.

2. Raise the Vehicle

Use the jack to lift the front or rear of the vehicle, depending on which struts are being replaced.
Secure the vehicle with jack stands for safety.

3. Remove the Strut Assembly

Remove the wheel to access the strut.
Locate and remove the bolts securing the strut to the steering knuckle.
Remove any brake line or sensor clips attached to the strut.
Detach the upper strut mount bolts located under the hood or in the trunk.
Carefully pull the strut assembly out of the vehicle.

4. Inspect and Replace

Tools Required: Strut spring compressor.

Use a strut spring compressor to safely compress the coil spring.
Remove the top nut of the strut mount and detach the coil spring from the strut.
Inspect the strut for signs of fluid leakage or physical damage.
If worn, replace the strut with a new one.
Reassemble in reverse order, ensuring all bolts are torqued to manufacturer specifications.

5. Reinstall and Lower the Vehicle

Reinstall the wheel and lower the vehicle back to the ground.
Reconnect the battery.