my BMW 5 Series G30/G31 (2017-2024) remote start not working, what's the issue?

BMW 5 Series G30/G31 (2017-2024)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

553 words

Problem Statement

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

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shorts.

Symptoms

•Remote start button is unresponsive
•No engine crank or start when remote button is pressed
•Dashboard lights may illuminate briefly but engine does not start
•Check engine light may be illuminated
•Key fob battery low warning may be displayed
•Possible error message on the iDrive system

Diagnostic Steps

1
Verify that the key fob is within range of the vehicle.
2
Check the key fob battery charge and replace if necessary.
3
Scan for any error codes using an OBD-II scanner to identify related issues.
4
Inspect the remote start system fuse for continuity and replace if blown.
5
Confirm that the vehicle is in a suitable state for remote start (e.g., doors closed, hood closed, and vehicle not in gear).
6
Check the vehicle's battery voltage to ensure it is within an acceptable range.

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 back cover of the key fob using a small screwdriver.
•Replace the old battery with a new one, ensuring correct polarity.
•Reassemble the key fob and test the remote start function.

Parts Required

•Key fob battery (CR2032)
•Replacement fuse (if necessary)

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Diagnostic Steps

1
Verify that the key fob is within range of the vehicle.
2
Check the key fob battery charge and replace if necessary.
3
Scan for any error codes using an OBD-II scanner to identify related issues.
4
Inspect the remote start system fuse for continuity and replace if blown.
5
Confirm that the vehicle is in a suitable state for remote start (e.g., doors closed, hood closed, and vehicle not in gear).
6
Check the vehicle's battery voltage to ensure it is within an acceptable range.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked safely and the engine is off.
Disconnect the battery to prevent any electrical shorts.

2. Replace Key Fob Battery

Tools Required: Small screwdriver, new battery (typically CR2032).
Remove the back cover of the key fob using a small screwdriver.
Replace the old battery with a new one, ensuring correct polarity.
Reassemble the key fob and test the remote start function.

3. Inspect and Replace Fuse

Tools Required: Fuse puller or needle-nose pliers.
Locate the fuse box (usually under the dashboard or in the engine compartment) and refer to the owner's manual for the remote start fuse location.
Remove the fuse and inspect for continuity. Replace with a new fuse of the same amperage if blown.
Reinstall the fuse and check the remote start function.

4. Verify Battery Voltage

Tools Required: Multimeter.
Set the multimeter to measure DC voltage.
Connect the multimeter probes to the vehicle battery terminals (red to positive, black to negative).
Ensure the voltage reads between 12.4 - 12.7 volts. If the voltage is low, charge or replace the battery as necessary.

5. Check Vehicle Conditions for Remote Start

Ensure all doors, the trunk, and the hood are securely closed.
Verify the vehicle is not in gear (for manual transmission vehicles).
Ensure the parking brake is engaged.