my BMW 3 Series G20/G21 (2019-2024) rear view camera is not working, how to troubleshoot?

BMW 3 Series G20/G21 (2019-2024)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

570 words

Problem Statement

The rear view camera on a BMW 3 Series G20/G21 (2019-2024) is not functioning, potentially affecting parking and reversing safety.

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components to prevent shorts.
•Ensure the vehicle is secure and cannot roll while working on the rear components.

Symptoms

•Rear view camera display is blank or not activating
•Error message displayed on the infotainment screen
•Camera lens appears dirty or obstructed
•No image or distorted image when the vehicle is in reverse
•Malfunction indicator light for the camera system illuminated

Diagnostic Steps

1
Inspect the camera lens for dirt, debris, or obstructions that might prevent proper visibility.
2
Check the vehicle’s settings to ensure that the rear view camera is enabled in the infotainment system.
3
Use an OBD-II scanner to check for any error codes related to the rear view camera system.
4
Inspect wiring and connections at the rear camera for signs of damage or corrosion.
5
Verify the reverse light operation; if the reverse lights do not activate, it may affect the camera's functionality.
6
Test the camera's voltage supply with a multimeter to ensure it is receiving power when the vehicle is in reverse.

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

•OBD-II scanner
•Multimeter
•Socket set
•Screwdriver set
•Microfiber cloth
•Glass cleaner

Parts Required

•Replacement rear view camera (if faulty)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect the camera lens for dirt, debris, or obstructions that might prevent proper visibility.
2
Check the vehicle’s settings to ensure that the rear view camera is enabled in the infotainment system.
3
Use an OBD-II scanner to check for any error codes related to the rear view camera system.
4
Inspect wiring and connections at the rear camera for signs of damage or corrosion.
5
Verify the reverse light operation; if the reverse lights do not activate, it may affect the camera's functionality.
6
Test the camera's voltage supply with a multimeter to ensure it is receiving power when the vehicle is in reverse.

Solution

1. Preparation

Gather all necessary tools and materials.
Ensure the vehicle is parked on a flat surface and the engine is turned off.
Disconnect the vehicle’s battery to prevent electrical shorts during repairs.

2. Clean the Camera Lens

Use a soft microfiber cloth and a mild glass cleaner to gently clean the camera lens.
Inspect the lens for any physical damage; if damaged, proceed to replacement.

3. Inspect Wiring and Connections

Remove any necessary panels to access the rear camera connection.
Visually inspect the wiring harness for frays, cuts, or corrosion.
Disconnect and reconnect the camera connector to ensure a solid connection.

4. Test the Camera Power Supply

Reconnect the battery and turn on the ignition.
Set the multimeter to measure DC voltage.
Probe the camera connector to check for voltage; it should read approximately 12V when the vehicle is in reverse.
- If no voltage is detected, trace the wiring back to find the fault.

5. Replace the Camera (if necessary)

If the camera is confirmed faulty, remove the existing camera by unscrewing it from its mount.
Install the new camera by reversing the removal process.
Ensure the new camera is securely fastened and connected properly.

6. Reassemble and Test

Reassemble any panels removed during the inspection.
Reconnect the battery.
Start the vehicle and shift into reverse to test the rear view camera.