how to fix BMW 3 Series F30/F31 (2012-2019) remote start not working

BMW 3 Series F30/F31 (2012-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

476 words

Problem Statement

The remote start feature on a BMW 3 Series F30/F31 (2012-2019) is not functioning, preventing the vehicle from starting via the key fob.

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 start button on key fob is unresponsive
•No engine start when pressing the remote start button
•Dashboard indicators do not light up
•Key fob battery is intact but still non-functional
•Vehicle starts normally using the ignition key

Diagnostic Steps

1
Check the key fob battery voltage using a multimeter to ensure it is charged.
2
Verify that the vehicle's battery is in good condition and holding charge.
3
Inspect the key fob for physical damage or water intrusion.
4
Scan the vehicle's OBD-II system for any fault codes related to the remote start system.
5
Confirm that the remote start feature is enabled in the vehicle's settings or through the BMW connected app.
6
Check the vehicle's hood latch and door sensors to ensure they are functioning properly and not triggering a safety lockout.

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
•Screwdriver set

Parts Required

•CR2032 key fob battery
•Hood latch or door sensor (if found faulty)

Related Faults

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Diagnostic Steps

1
Check the key fob battery voltage using a multimeter to ensure it is charged.
2
Verify that the vehicle's battery is in good condition and holding charge.
3
Inspect the key fob for physical damage or water intrusion.
4
Scan the vehicle's OBD-II system for any fault codes related to the remote start system.
5
Confirm that the remote start feature is enabled in the vehicle's settings or through the BMW connected app.
6
Check the vehicle's hood latch and door sensors to ensure they are functioning properly and not triggering a safety lockout.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to ensure safety while working on electrical components.
Tools Required: OBD-II scanner, multimeter, screwdriver set.

2. Key Fob Battery Replacement

Open the key fob using a flathead screwdriver to pry it apart gently.
Remove the old battery, noting the orientation.
Insert a new CR2032 battery, ensuring it is positioned correctly.
Reassemble the key fob and test the remote start function.

3. Inspect and Test Hood Latch and Door Sensors

Locate the hood latch and door sensors on the vehicle.
Visually inspect for any damage or misalignment.
Use a multimeter to test continuity on the hood latch and door sensors.
If faulty, replace the defective components.

4. Resetting the Remote Start System

Reconnect the vehicle battery.
Use the OBD-II scanner to clear any fault codes related to the remote start system.
Follow specific vehicle procedures to reset the remote start feature, which may involve turning the ignition on and off in a specific sequence.