why is my BMW 3 Series G20/G21 (2019-2024) rearview camera not working

BMW 3 Series G20/G21 (2019-2024)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

537 words

Problem Statement

The rearview camera on a BMW 3 Series G20/G21 (2019-2024) is not functioning, preventing the driver from using the camera for parking or reversing.

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the negative battery terminal before working on electrical systems to prevent shorts.

Symptoms

•Rearview camera display is black or blank
•Error message indicating camera malfunction on the infotainment system
•Camera image is distorted or unclear
•Camera does not activate when the vehicle is placed in reverse
•No audible parking sensors when in reverse (if equipped)

Diagnostic Steps

1
Check for any error codes using an OBD-II scanner to determine if there are any fault codes related to the rearview camera system.
2
Inspect the rearview camera lens for physical damage or obstructions, such as dirt or ice, that might prevent proper function.
3
Verify the camera wiring harness connection at both the camera and the control module for any loose or damaged connections.
4
Test the camera voltage supply with a multimeter to ensure the camera is receiving power when the vehicle is in reverse.
5
Check the vehicle's settings in the infotainment system to confirm that the rearview camera is enabled.

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

•Instructions:**
•Inspect the camera lens for dirt or obstructions.
•Clean the lens gently with a soft cloth and mild detergent if necessary.

Parts Required

•Replacement rearview camera (if needed)

Related Faults

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Diagnostic Steps

1
Check for any error codes using an OBD-II scanner to determine if there are any fault codes related to the rearview camera system.
2
Inspect the rearview camera lens for physical damage or obstructions, such as dirt or ice, that might prevent proper function.
3
Verify the camera wiring harness connection at both the camera and the control module for any loose or damaged connections.
4
Test the camera voltage supply with a multimeter to ensure the camera is receiving power when the vehicle is in reverse.
5
Check the vehicle's settings in the infotainment system to confirm that the rearview camera is enabled.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and securely set in "Park."
Disconnect the negative battery terminal to avoid electrical shorts.

2. Inspect and Clean Camera

Tools Required: Cleaning cloth, mild detergent.
Instructions:
- Inspect the camera lens for dirt or obstructions.
- Clean the lens gently with a soft cloth and mild detergent if necessary.

3. Check Wiring Connections

Tools Required: Socket set, multimeter.
Instructions:
- Access the rearview camera by removing any necessary trim or panels.
- Carefully disconnect the camera's wiring harness.
- Inspect the connectors for corrosion or damage.
- Reconnect the wiring harness securely.

4. Test Voltage Supply

Tools Required: Multimeter.
Instructions:
- With the vehicle in reverse, use the multimeter to test the voltage at the camera connector.
- Ensure there is approximately 12V present. If not, trace back to the control module or fuse.

5. Replace Camera (if necessary)

Tools Required: Socket set, potentially a trim removal tool.
Instructions:
- If the camera is not functioning after testing and cleaning, replace the rearview camera.
- Remove the old camera by unscrewing it and disconnecting the wiring harness.
- Install the new camera by connecting the wiring harness and securing it in place.