my BMW 5 Series G30/G31 won't shift into gear what could be wrong

BMW 5 Series G30/G31 (2017-2024)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

475 words

Problem Statement

The BMW 5 Series G30/G31 is experiencing issues with shifting into gear, indicating a potential problem with the transmission system.

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the vehicle to cool down before inspecting the transmission.

Symptoms

•Engine revs without vehicle movement
•Transmission warning light illuminated on the dashboard
•Difficulty in shifting between park, reverse, and drive
•Unusual noises when attempting to shift gears
•Fluid leaks under the vehicle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify transmission-related faults.
2
Inspect transmission fluid level and condition; check for burnt smell or metal shavings.
3
Verify that the gear selector is functioning properly by checking for physical blockages or damage.
4
Test the brake pedal switch to ensure it is operational, as it can prevent shifting.
5
Check for issues with the transmission control module (TCM) wiring and connectors for corrosion or damage.

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
•Socket set
•Funnel
•Multimeter

Parts Required

•Transmission fluid
•Transmission filter
•Brake pedal switch (if faulty)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify transmission-related faults.
2
Inspect transmission fluid level and condition; check for burnt smell or metal shavings.
3
Verify that the gear selector is functioning properly by checking for physical blockages or damage.
4
Test the brake pedal switch to ensure it is operational, as it can prevent shifting.
5
Check for issues with the transmission control module (TCM) wiring and connectors for corrosion or damage.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the negative battery terminal to ensure safety.

2. Check and Replace Transmission Fluid

Use the appropriate socket set to remove the transmission pan.
Drain the old transmission fluid into a clean container.
Replace the transmission filter if necessary, following the manufacturer's guidelines.
Refill with the specified type of transmission fluid using a funnel.

3. Inspect and Repair Gear Selector Mechanism

Remove the center console cover to access the gear selector.
Inspect for any broken or disconnected linkages.
Reconnect or replace any damaged components as necessary.

4. Test and Replace Brake Pedal Switch (if needed)

Locate the brake pedal switch, which is usually mounted near the top of the brake pedal.
Disconnect the electrical connector and remove the switch.
Test the switch using a multimeter; replace if it does not function correctly.

5. Reconnect Battery and Test Drive

Reconnect the negative battery terminal.
Start the vehicle and ensure all warning lights are off.
Test drive the vehicle to confirm proper shifting functionality.