how to fix the rearview camera not working in my 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

501 words

Problem Statement

The rearview camera in a 2019-2024 BMW 3 Series G20/G21 is not functioning, resulting in no image being displayed when the vehicle is in reverse.

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components to avoid shorts or shocks.

Symptoms

•No image displayed on the infotainment screen when the vehicle is in reverse
•Check control message indicating camera malfunction
•Camera lens appears dirty or obstructed
•Inconsistent camera activation when selecting reverse
•Delayed image display upon engaging reverse gear

Diagnostic Steps

1
Check for any error messages or codes related to the camera system using an OBD-II scanner.
2
Inspect the rearview camera lens for dirt, debris, or physical damage.
3
Verify the camera's electrical connections and wiring harness for any disconnections or shorts.
4
Test the camera system activation by engaging the reverse gear and observing if the camera tries to activate.
5
Check the vehicle's software version to ensure it is up to date, as software issues may affect camera functionality.

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
•Trim removal tool
•Soft cloth
•Glass cleaner
•BMW-approved diagnostic tool (for software updates)

Parts Required

•Replacement wiring harness (if damaged)
•Rearview camera (if defective)

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Diagnostic Steps

1
Check for any error messages or codes related to the camera system using an OBD-II scanner.
2
Inspect the rearview camera lens for dirt, debris, or physical damage.
3
Verify the camera's electrical connections and wiring harness for any disconnections or shorts.
4
Test the camera system activation by engaging the reverse gear and observing if the camera tries to activate.
5
Check the vehicle's software version to ensure it is up to date, as software issues may affect camera functionality.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to prevent electrical shorts while working on the camera system.

2. Inspect and Clean Camera Lens

Locate the rearview camera, typically mounted near the trunk or tailgate.
Use a soft cloth and a suitable glass cleaner to clean the camera lens thoroughly.
Check for any obstructions that may block the camera view.

3. Check and Repair Electrical Connections

Remove the interior trim covering the rear camera wiring (using a trim removal tool).
Inspect the wiring harness for signs of wear, corrosion, or damage. If damaged, repair or replace the wiring.
Ensure all connectors are securely attached and free of dirt/corrosion.

4. Reset the Camera System

With the vehicle's battery still disconnected, wait for approximately 10 minutes to allow the system to reset.
Reconnect the battery and turn the vehicle on.
Engage the reverse gear to check if the camera activates properly.

5. Update Vehicle Software (if necessary)

Use a BMW-approved diagnostic tool to check for software updates.
Follow the manufacturer's instructions to install any available updates that may resolve the camera issue.