my BMW 3 Series E90/E91 (2005-2012) won't start and makes a clicking sound

BMW 3 Series E90/E91 (2005-2012)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

504 words

Problem Statement

The BMW 3 Series E90/E91 (2005-2012) is experiencing a no-start condition accompanied by a clicking sound when attempting to start the vehicle.

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Clicking sound from the engine compartment when the ignition is turned on
•No cranking of the engine
•Dashboard lights and accessories may illuminate but dim when attempting to start
•Potential battery warning light illuminated
•Engine does not turn over

Diagnostic Steps

1
Check the battery voltage using a multimeter; it should be above 12.4 volts.
2
Inspect battery terminals and cables for corrosion or loose connections.
3
Test the starter motor by bypassing it with a jumper wire to see if it engages.
4
Examine the fuses related to the starting circuit for any blown fuses.
5
Scan for error codes using an OBD-II scanner to check for any relevant diagnostic trouble codes (DTCs).

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

•Multimeter
•Socket set
•Wrench set
•Jumper cables
•Disconnect the negative battery terminal to prevent electrical shock or short circuits.

Parts Required

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

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the battery voltage using a multimeter; it should be above 12.4 volts.
2
Inspect battery terminals and cables for corrosion or loose connections.
3
Test the starter motor by bypassing it with a jumper wire to see if it engages.
4
Examine the fuses related to the starting circuit for any blown fuses.
5
Scan for error codes using an OBD-II scanner to check for any relevant diagnostic trouble codes (DTCs).

Solution

1. Preparation

Tools Required:
- Multimeter
- Socket set
- Wrench set
- Jumper cables
Disconnect the negative battery terminal to prevent electrical shock or short circuits.

2. Battery Inspection and Replacement

Sub-steps:
1. Reconnect the battery terminals if they were disconnected for testing.
2. If the battery voltage is low, jump-start the vehicle using jumper cables.
3. If the battery is confirmed faulty (e.g., less than 12.4 volts), remove the battery:
  - Disconnect the positive terminal first, then the negative terminal.
  - Remove any battery hold-down brackets.
4. Replace with a new battery of the same specification (typically 12V, group size 48 or 49).
5. Reconnect the terminals (negative first, then positive).

3. Starter Motor Inspection and Replacement

Sub-steps:
1. If the battery is functional, locate the starter motor (typically near the transmission bell housing).
2. Disconnect the electrical connections from the starter motor.
3. Remove the starter motor mounting bolts using a socket set.
4. Carefully remove the starter from its position.
5. Inspect the starter for signs of wear or damage; if faulty, replace with a new starter motor.
6. Reinstall the new starter motor and secure with mounting bolts, torqueing them to manufacturer specifications (usually around 10-15 Nm).
7. Reconnect the electrical connections.

4. Testing the System

Reconnect the negative battery terminal.
Attempt to start the vehicle to verify if the issue is resolved.