why does my BMW 5 Series G30/G31 (2017-2024) remote start not function

BMW 5 Series G30/G31 (2017-2024)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

535 words

Problem Statement

The remote start feature of a BMW 5 Series G30/G31 (2017-2024) is not functioning, preventing the vehicle from starting via the key fob or mobile app.

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Ensure the work area is well-ventilated when testing remote start features.

Symptoms

•Remote start button does not respond when pressed.
•Check engine light illuminated on the dashboard.
•Vehicle does not start, even when attempting to start manually.
•Warning messages displayed on the infotainment system.
•Battery drain observed or a weak battery condition.
•Security system light blinking continuously.

Diagnostic Steps

1
Verify that the remote start feature is enabled in the vehicle settings.
2
Check the battery voltage of the key fob and replace if low.
3
Scan the vehicle with an OBD-II scanner for any error codes.
4
Inspect the vehicle’s battery condition and connections for corrosion or looseness.
5
Examine the vehicle's security system for any active immobilizer issues.
6
Confirm that all doors, hood, and trunk are securely closed.

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
•Flathead screwdriver
•Wire brush
•Dielectric grease

Parts Required

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

Related Faults

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Symptoms

•Remote start button does not respond when pressed.

•Check engine light illuminated on the dashboard.

•Vehicle does not start, even when attempting to start manually.

•Warning messages displayed on the infotainment system.

•Battery drain observed or a weak battery condition.

•Security system light blinking continuously.

Diagnostic Steps

1
Verify that the remote start feature is enabled in the vehicle settings.
2
Check the battery voltage of the key fob and replace if low.
3
Scan the vehicle with an OBD-II scanner for any error codes.
4
Inspect the vehicle’s battery condition and connections for corrosion or looseness.
5
Examine the vehicle's security system for any active immobilizer issues.
6
Confirm that all doors, hood, and trunk are securely closed.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked in a safe and ventilated area.
Disconnect the vehicle battery to prevent electrical shocks while working.

2. Check Key Fob Battery

Remove the key fob battery cover using a flathead screwdriver.
Replace the old battery with a new one (typically CR2032).
Reassemble the key fob and test the remote start function.

3. Inspect Vehicle Battery

Use a multimeter to check battery voltage; it should read between 12.4V to 12.7V.
If the voltage is low, charge the battery or replace it if faulty.
Clean any corrosion from battery terminals using a wire brush and apply dielectric grease.

4. Scan for Diagnostic Trouble Codes (DTCs)

Connect the OBD-II scanner to the vehicle's diagnostic port.
Retrieve and record any codes related to the engine, security, or battery management systems.
Address any identified issues based on the error codes (e.g., clear codes and monitor if they return).

5. Inspect Security System

Check the status of the immobilizer system; ensure it recognizes the key fob.
If necessary, perform a reset or reprogram the key fob using the vehicle’s onboard settings or consult the owner's manual for specific instructions.