my BMW 3 Series F30/F31 (2012-2019) remote start not working what to check

BMW 3 Series F30/F31 (2012-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

528 words

Problem Statement

The remote start function of a BMW 3 Series F30/F31 (2012-2019) is not operational, preventing the vehicle from starting remotely.

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.

Symptoms

•Remote key fob not unlocking the doors
•No response from the vehicle when attempting to start remotely
•Dashboard lights do not illuminate when remote start is attempted
•Check engine light illuminated (if applicable)
•Battery low warning on the dashboard
•Key fob signal weak or unresponsive

Diagnostic Steps

1
Check the battery level of the remote key fob and replace it if low.
2
Inspect the vehicle’s battery for charge and connection issues.
3
Use an OBD-II scanner to check for any error codes related to the starting system.
4
Verify the remote start feature is enabled in the vehicle settings.
5
Inspect the vehicle’s fuses related to the remote start system.
6
Ensure the hood and doors are fully closed, as the remote start will not activate with these open.

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
•Small flathead screwdriver
•Fuse puller (optional)

Parts Required

•CR2032 battery for key fob
•Replacement fuses (if necessary)

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Symptoms

•Remote key fob not unlocking the doors

•No response from the vehicle when attempting to start remotely

•Dashboard lights do not illuminate when remote start is attempted

•Check engine light illuminated (if applicable)

•Battery low warning on the dashboard

•Key fob signal weak or unresponsive

Diagnostic Steps

1
Check the battery level of the remote key fob and replace it if low.
2
Inspect the vehicle’s battery for charge and connection issues.
3
Use an OBD-II scanner to check for any error codes related to the starting system.
4
Verify the remote start feature is enabled in the vehicle settings.
5
Inspect the vehicle’s fuses related to the remote start system.
6
Ensure the hood and doors are fully closed, as the remote start will not activate with these open.

Solution

1. Preparation

Gather required tools and parts.
Ensure the vehicle is parked in a safe area with the engine off.
Disconnect the vehicle battery to avoid electrical issues.

2. Replace Remote Key Fob Battery

Open the key fob using a small flathead screwdriver.
Remove the old battery and replace it with a new CR2032 battery, ensuring correct polarity (+/-).
Reassemble the key fob.

3. Check Vehicle Battery

Inspect battery terminals for corrosion and ensure they are tight.
Test the battery voltage using a multimeter; it should be above 12.4 volts.
If the battery is weak, jump-start or replace the vehicle battery.

4. Inspect Fuses

Locate the fuse box (usually found under the dashboard or in the engine compartment).
Refer to the owner’s manual for the fuse layout and identify the fuse for the remote start system.
Replace any blown fuses with the same amperage rating.

5. Reconnect Vehicle Battery

Reconnect the vehicle battery, ensuring the positive terminal is connected first.
Tighten the battery terminals securely.

6. Verify Remote Start System Settings

Start the vehicle normally using the ignition key.
Navigate to the vehicle settings menu on the dashboard display.
Ensure the remote start feature is enabled.