my BMW 5 Series G30/G31 (2017-2024) remote start isn’t working, what can I do?

BMW 5 Series G30/G31 (2017-2024)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

556 words

Problem Statement

The remote start feature on a 2017-2024 BMW 5 Series G30/G31 is not functioning as intended.

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before performing any electrical inspections to prevent shocks or shorts.

Symptoms

•Remote start button does not respond when pressed
•Dashboard indicators do not illuminate
•Engine does not crank or start remotely
•No audible feedback from the vehicle (e.g., horn or lights)
•Possible "Remote Start Disabled" message on the dashboard

Diagnostic Steps

1
Check the battery voltage of the key fob using a multimeter to ensure it's functioning properly.
2
Verify that the vehicle is within the remote start range and not obstructed by any physical barriers.
3
Scan the vehicle's OBD-II for any fault codes related to the remote start system.
4
Inspect the vehicle's settings in the iDrive system to confirm that the remote start feature is enabled.
5
Test the vehicle's ignition switch and starter relay for functionality.
6
Ensure that the vehicle is in "Park" mode, as remote start typically requires this condition.

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

•Open the key fob using a small screwdriver or a coin to pry it apart.
•Snap the key fob back together securely.

Parts Required

•CR2032 battery for key fob

Related Faults

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Diagnostic Steps

1
Check the battery voltage of the key fob using a multimeter to ensure it's functioning properly.
2
Verify that the vehicle is within the remote start range and not obstructed by any physical barriers.
3
Scan the vehicle's OBD-II for any fault codes related to the remote start system.
4
Inspect the vehicle's settings in the iDrive system to confirm that the remote start feature is enabled.
5
Test the vehicle's ignition switch and starter relay for functionality.
6
Ensure that the vehicle is in "Park" mode, as remote start typically requires this condition.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to prevent any electrical shorts during inspection.

2. Key Fob Battery Replacement

Tools Required: Small screwdriver or coin
Open the key fob using a small screwdriver or a coin to pry it apart.
Remove the old battery and replace it with a new CR2032 battery, ensuring the positive side is facing up.
Snap the key fob back together securely.

3. Check Remote Start Settings

Reconnect the vehicle battery.
Start the vehicle using the ignition key and navigate to the iDrive settings.
Go to "Settings" > "Remote Start" and ensure it is enabled.

4. Inspect Ignition Switch and Starter Relay

Tools Required: Multimeter, socket set
Locate the ignition switch and starter relay (refer to the vehicle's service manual for specific locations).
Use a multimeter to test the ignition switch for continuity when turned to the "Start" position.
Check the starter relay by swapping it with a known good relay in the fuse box or testing it directly with a multimeter.

5. Reprogram Key Fob (if necessary)

If the key fob is still unresponsive, reprogram it:
- Insert the key in the ignition and turn it to the "On" position without starting the engine.
- Press and hold the unlock button on the key fob for about 10 seconds.
- Release the button and turn the key to the "Off" position, then remove it.