2003 - 2006 BMW Z4 Immobilizer Control Module (OEM)

What to Look for When Buying This Part

• Make sure the part is specifically designed for your car's year and model.
• Check the part's condition. If buying a used part, look for one that is clean and free of damage.
• Ask about the seller's return policy. You want to be able to return the part if it doesn't work.

Quality Indicators for the Available Options

What's Typically Included with the Part

• The immobilizer control module itself.
• Sometimes, the seller may include installation instructions or diagrams.
• Key fobs are usually NOT included.

Difficulty Level and Estimated Time

• Difficulty: Medium
• Estimated Time: 1-2 hours

Special Tools Needed (if any)

• Basic hand tools (sockets, wrenches, screwdrivers)
• Scan tool to program the new immobilizer control module to your car.
• Multimeter to test electrical connections.

Critical Steps and Tips

1. Disconnect the car battery before starting any work.
2. Locate the immobilizer control module. It's often under the dashboard or near the steering column.
3. Carefully disconnect the wiring harness from the old module.
4. Install the new module and reconnect the wiring harness.
5. Reconnect the car battery.
6. Use a scan tool to program the new module to your car. This step is crucial for the car to start.

Whether DIY is Recommended or Professional Installation is Better

• Professional installation is recommended. Programming the new module requires specialized equipment and knowledge. If you are not comfortable working with car electronics, it's best to leave it to a professional.

Compare: Used OEM, New Aftermarket

Used OEM

• These are original parts that came from the factory.
• They are tested and inspected to make sure they are working properly.
• They offer great value because they are genuine factory parts at a lower price.

New Aftermarket

• These are brand new parts made by companies other than the original car manufacturer.
• They are designed to meet the original equipment specifications.
• They can be a good option if you want a new part and don't mind if it's not the original brand.

Parts Commonly Replaced or Checked at the Same Time

• Key Fob: If the key fob isn't working, it might need a new battery or reprogramming.
• Ignition Switch: A faulty ignition switch can prevent the car from starting.
• Car Battery: A weak or dead battery can cause immobilizer problems.
• Wiring Harness: Damaged wiring can cause electrical problems that affect the immobilizer.

Why Replacing Related Parts Prevents Repeat Failures

• Replacing related parts at the same time can help prevent future problems. For example, if a faulty ignition switch caused the immobilizer to fail, replacing the ignition switch along with the immobilizer will prevent the new immobilizer from failing as well.

How Long This Part Normally Lasts

• The immobilizer control module can last for the entire lifespan of the car, which is typically 10-15 years or more.

Factors That Affect Longevity

• Exposure to water or moisture.
• Electrical surges or shorts.
• Physical damage.
• Quality of the part itself.

Budget vs Mid-Range vs Premium Options

• Used OEM: $50 - $150
• New Aftermarket: $100 - $300

Labor Cost Considerations if Applicable

• Labor costs for installation can range from $100 to $300, depending on the mechanic's hourly rate and the complexity of the job.

Total Job Cost Estimates

• Used OEM + Labor: $150 - $450
• New Aftermarket + Labor: $200 - $600

Known Issues for This Vehicle's System Related to This Part

• Some models have issues with water leaking into the immobilizer control module, causing it to fail. Check for signs of water damage if you are experiencing problems.
• Key fob programming issues are also common.

Any TSBs or Common Complaints

• There may be Technical Service Bulletins (TSBs) related to immobilizer problems on this vehicle. Check with a mechanic or search online for TSBs related to your car's year and model.

How to Confirm Proper Operation

• Start the car to make sure it starts and runs normally.
• Test the key fob to make sure it locks and unlocks the doors.
• Check the security light on the dashboard to make sure it goes off after the car starts.

What to Look/Listen for to Verify It's Working Correctly

• The car should start quickly and easily.
• The engine should run smoothly without stalling.
• The security light should not stay on or flash after the car starts.
• The key fob should work reliably.

Q: Will this part need to be programmed to my car?
A: Yes, this part will almost certainly need to be programmed to your car by a mechanic with the correct scan tool. The car needs to recognize the new module and your key.

Q: What happens if I don't program the immobilizer control module?
A: If you don't program the module, the car will likely not start. The immobilizer system prevents the engine from running if it doesn't recognize the key.

Q: Can I program the immobilizer control module myself?
A: It's unlikely. Programming usually requires specialized scan tools and software that are typically only available to professional mechanics.

Q: How do I find a mechanic who can program this part?
A: Call local auto repair shops and ask if they have experience programming immobilizer control modules. Make sure they have the necessary scan tools for your car's make and model.

Q: What if the new immobilizer control module doesn't fix the problem?
A: There could be other issues with your car's security system or engine. A mechanic can perform further diagnostics to identify the root cause of the problem.

OEM Part Numbers:

• BMW: 61350303886, 61350411722, 61354100191, 61354146384, 61356905670, 61356937791, 613569377919, 61358382455, 61359145097, 61359145349

Fits Years: 2003 2004 2005 2006