how to fix the rearview camera not working in BMW 3 Series G20/G21 (2019-2024)

BMW 3 Series G20/G21 (2019-2024)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

559 words

Problem Statement

The rearview camera in a BMW 3 Series G20/G21 (2019-2024) is not functioning properly, preventing the display of the rearview image on the infotainment screen.

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to avoid short circuits.
•Allow the vehicle to cool down if working on components near the exhaust.

Symptoms

•Rearview camera display is blank or not showing image
•"Camera malfunction" warning message appears on the screen
•Camera does not activate when vehicle is placed in reverse
•Inconsistent camera performance (works intermittently)
•Distorted or unclear image when the camera does activate

Diagnostic Steps

1
Scan the vehicle's onboard diagnostic system using an OBD-II scanner to check for any trouble codes related to the rearview camera system.
2
Inspect the camera lens for dirt, damage, or obstructions that may affect visibility.
3
Verify the camera connection by checking the wiring harness and connectors for corrosion or looseness.
4
Check the vehicle's settings to ensure the rearview camera system is enabled in the infotainment settings.
5
Perform a visual inspection of the rearview camera module for any signs of physical damage.

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
•Screwdriver set
•Soft cloth
•Cleaning solution

Parts Required

•Replacement rearview camera (if necessary)
•Wiring harness (if damaged)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's onboard diagnostic system using an OBD-II scanner to check for any trouble codes related to the rearview camera system.
2
Inspect the camera lens for dirt, damage, or obstructions that may affect visibility.
3
Verify the camera connection by checking the wiring harness and connectors for corrosion or looseness.
4
Check the vehicle's settings to ensure the rearview camera system is enabled in the infotainment settings.
5
Perform a visual inspection of the rearview camera module for any signs of physical damage.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the vehicle battery to ensure safety while working on electrical components.
Make sure the vehicle is in a safe and stable position.

2. Inspect and Clean the Camera

Locate the rearview camera, usually mounted on the trunk or rear bumper.
Use a soft cloth and mild soap to clean the camera lens.
If the lens is damaged, proceed to replace it.

3. Check and Repair Wiring

Remove any trim or panels covering the camera wiring harness.
Inspect the wiring for signs of wear, fraying, or damage.
If damaged, repair or replace the wiring as necessary.
Reconnect any loose connectors ensuring they are secure.

4. Replace Camera Module (if necessary)

If the camera is confirmed faulty, remove the old camera by unscrewing it from its mount.
Disconnect the wiring harness from the camera.
Install the new camera by connecting the wiring harness and securing it in place with screws.
Ensure the camera is properly aligned.

5. Reassemble and Test

Reinstall any trim or panels that were removed.
Reconnect the vehicle battery.
Start the vehicle and put it in reverse to test the rearview camera functionality.