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

BMW 3 Series G20/G21 (2019-2024)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

513 words

Problem Statement

The rearview camera on a 2019-2024 BMW 3 Series G20/G21 is not functioning, which may impact visibility while reversing and pose safety concerns.

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent short circuits or electric shock.

Symptoms

•Rearview camera display is blank or unresponsive.
•Error message displayed on the infotainment screen regarding the camera system.
•Camera image is distorted or low quality.
•Backup assist features are disabled.
•Check control message indicating a malfunction.

Diagnostic Steps

1
Inspect the camera lens for obstructions or damage.
2
Check the vehicle's fuse box for blown fuses related to the camera system.
3
Use an OBD-II scanner to check for any error codes related to the rearview camera.
4
Verify the connection of the camera harness to the vehicle's electrical system.
5
Ensure that the infotainment system is updated to the latest software version.

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
•Torx screwdriver
•Multimeter
•OBD-II scanner

Parts Required

•Replacement fuse (if blown)
•Wiring harness (if damaged)

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Diagnostic Steps

1
Inspect the camera lens for obstructions or damage.
2
Check the vehicle's fuse box for blown fuses related to the camera system.
3
Use an OBD-II scanner to check for any error codes related to the rearview camera.
4
Verify the connection of the camera harness to the vehicle's electrical system.
5
Ensure that the infotainment system is updated to the latest software version.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to ensure safety while working on electrical components.
Tools Required: Socket set, Torx screwdriver, multimeter, OBD-II scanner.

2. Inspect and Clean the Camera

Locate the rearview camera housing on the vehicle's rear.
Use a microfiber cloth to clean the camera lens to remove any dirt or debris.
Check for any visible signs of damage to the camera housing.

3. Check and Replace Fuses

Open the fuse box and locate the fuse associated with the rearview camera.
Use the fuse puller or pliers to remove the fuse and inspect it for continuity.
If the fuse is blown, replace it with one of the same amperage rating (consult the owner's manual for the correct rating).
Tools Required: Fuse puller or pliers.

4. Inspect Electrical Connections

Remove the rear trim panel to access the camera wiring harness (use a Torx screwdriver if necessary).
Check for any loose or corroded wiring connections.
Use a multimeter to test the voltage at the camera connector. Ensure it meets the manufacturer's specifications.
If damaged, repair or replace the wiring as needed.

5. Reconnect and Test

Reassemble any panels removed during the inspection.
Reconnect the vehicle battery.
Start the vehicle and engage reverse to check if the rearview camera is operational.