my BMW 5 Series won't start and just clicks what now

BMW 5 Series G30/G31 (2017-2024)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

534 words

Problem Statement

The BMW 5 Series is experiencing a no-start condition accompanied by a clicking sound when attempting to start the engine.

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before accessing the starter motor.

Symptoms

•Engine does not crank
•Repeated clicking sound from the starter motor
•Dashboard lights illuminate but may dim when attempting to start
•No response from the engine when the key is turned
•Possible battery warning light illuminated

Diagnostic Steps

1
Check battery voltage using a multimeter; a healthy battery should measure around 12.6 volts or more.
2
Inspect battery terminals for corrosion or loose connections.
3
Verify battery charge; if low, attempt to jump-start the vehicle.
4
Test the starter motor function by bypassing the ignition switch (using a remote starter switch or jumper).
5
Examine fuses related to the starting system for any blown fuses.
6
Check for any error codes using an OBD-II scanner for additional diagnostics.

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
•Wrench set
•Jumper cables
•Remote starter switch

Parts Required

•New battery (if necessary)
•New starter motor (if necessary)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check battery voltage using a multimeter; a healthy battery should measure around 12.6 volts or more.
2
Inspect battery terminals for corrosion or loose connections.
3
Verify battery charge; if low, attempt to jump-start the vehicle.
4
Test the starter motor function by bypassing the ignition switch (using a remote starter switch or jumper).
5
Examine fuses related to the starting system for any blown fuses.
6
Check for any error codes using an OBD-II scanner for additional diagnostics.

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, wrench set, jumper cables, and a remote starter switch.
Ensure the vehicle is in park (automatic) or neutral (manual) and the parking brake is engaged.
Disconnect the negative battery terminal to prevent any accidental short circuits.

2. Battery Inspection and Replacement

Inspect Battery
- Clean the battery terminals with a wire brush to remove corrosion.
- Tighten any loose connections.
Test Battery Voltage
- Connect the multimeter to the battery terminals.
- If voltage is below 12.4 volts, charge or replace the battery.
- If the battery is dead, jump-start the vehicle.
Replace Battery (if necessary)
- Remove the battery hold-down bracket using a wrench.
- Carefully lift out the old battery.
- Place the new battery in the compartment, ensuring correct polarity.
- Reattach the hold-down bracket and tighten securely.

3. Starter Motor Inspection

Access Starter Motor
- Locate the starter motor (usually near the transmission).
- Remove any components obstructing access (e.g., engine cover or heat shield).
Test Starter Operation
- Use a remote starter switch to engage the starter directly.
- If the starter clicks or does not engage, it may need replacement.
Replace Starter Motor (if necessary)
- Disconnect the wiring harness and remove the mounting bolts.
- Install the new starter motor and reconnect the wiring harness.
- Ensure all connections are secure and reassemble any components removed.