how to fix my BMW 5 Series G30/G31 (2017-2024) if the remote start isn’t working

BMW 5 Series G30/G31 (2017-2024)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

533 words

Problem Statement

The remote start feature on a 2017-2024 BMW 5 Series G30/G31 is not functioning as expected, preventing the engine 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 shocks and shorts.
•Allow the vehicle to cool down if working on electrical systems related to the engine.

Symptoms

•Remote start button does not respond when pressed.
•Check control message indicating remote start malfunction.
•Engine does not crank or start.
•Possible battery drain warning.
•Inability to activate climate control features remotely.

Diagnostic Steps

1
Confirm the vehicle is equipped with the remote start feature by checking the owner's manual.
2
Inspect the key fob battery; replace if low or dead.
3
Verify that the vehicle’s battery is fully charged and in good condition.
4
Check for any stored error codes using an OBD-II scanner.
5
Ensure all doors, hood, and trunk are securely closed, as remote start may not activate if any are open.
6
Test the remote start function from a different location to rule out range issues.

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

•Remove the key fob from the keychain.
•Use the flathead screwdriver to gently pry open the key fob casing.
•Replace the old battery with a new battery (typically CR2032).
•Snap the key fob casing back together.

Parts Required

•Key fob battery (CR2032)
•Vehicle battery (if replacement is necessary)

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Diagnostic Steps

1
Confirm the vehicle is equipped with the remote start feature by checking the owner's manual.
2
Inspect the key fob battery; replace if low or dead.
3
Verify that the vehicle’s battery is fully charged and in good condition.
4
Check for any stored error codes using an OBD-II scanner.
5
Ensure all doors, hood, and trunk are securely closed, as remote start may not activate if any are open.
6
Test the remote start function from a different location to rule out range issues.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked in a well-ventilated area.
Disconnect the battery to avoid electrical shorts while working on the system.

2. Key Fob Battery Replacement

Tools Required: Small flathead screwdriver
Remove the key fob from the keychain.
Use the flathead screwdriver to gently pry open the key fob casing.
Replace the old battery with a new battery (typically CR2032).
Snap the key fob casing back together.

3. Battery Inspection

Tools Required: Multimeter
Reconnect the vehicle’s battery.
Use a multimeter to check the voltage of the vehicle’s battery; it should be above 12.6 volts.
If the voltage is low, charge or replace the battery as necessary.

4. Error Code Clearing

Tools Required: OBD-II scanner
Connect the OBD-II scanner to the vehicle’s diagnostic port.
Scan for any error codes related to the remote start system.
Clear any relevant error codes and disconnect the scanner.

5. Check Security Features

Tools Required: None
Ensure that all doors, hood, and trunk are closed securely.
Attempt the remote start function again to see if it activates.

6. Reprogram Key Fob (if necessary)

Tools Required: BMW-specific coding tool or software
Follow the manufacturer’s instructions to reprogram the key fob if it is still unresponsive.
This may require connecting to the vehicle’s onboard diagnostics system.