2003 - 2008 BMW Z4 Immobilizer Control Module (OEM)

• What to look for when buying this part:
• Make sure the part is specifically for your car's year, make, and model.
• Check the part's condition carefully.
• Ask about any warranty or return policy.

• Quality indicators:
• For used parts, look for ones that have been tested and inspected.
• Check for any signs of damage or corrosion.
• Ask about the part's history, if possible.

• What's typically included:
• The immobilizer control module itself.
• Sometimes, the module comes with a wiring harness or connector.

• Difficulty level: Medium
• Estimated time: 1-2 hours

• Special tools needed:
• Basic hand tools (screwdrivers, sockets, wrenches)
• Diagnostic scanner (optional, for clearing error codes)

• Critical steps and tips:

1. Disconnect the negative battery cable.
2. Locate the immobilizer control module (usually under the dashboard or center console).
3. Disconnect the wiring harness from the old module.
4. Install the new module and reconnect the wiring harness.
5. Reconnect the negative battery cable.
6. Start the car to test the new module.
7. Use a diagnostic scanner to clear any error codes.

• DIY or professional installation:
• DIY is possible if you have some mechanical experience.
• Professional installation is recommended if you are not comfortable working on your car's electrical system.

• Compare: Used OEM, New Aftermarket

• Used OEM:
• Best value for the money.
• Genuine factory parts.
• Tested and inspected to ensure they work.
• Significantly lower price than new parts.

• New Aftermarket:
• Brand new parts made by third-party manufacturers.
• Built to meet or exceed original equipment (OE) specifications.
• Can be a good option if you want a new part but don't want to pay the high price of a new factory part.

• Parts commonly replaced or checked:
• Key transponder
• Ignition switch
• Battery
• Starter

• Why replacing related parts prevents repeat failures:
• Replacing worn or damaged related parts can prevent stress on the new immobilizer control module.
• A weak battery can cause electrical problems that damage the module.
• A faulty ignition switch can send incorrect signals to the module.

• How long this part normally lasts:
• 7-10 years on average.

• Factors that affect longevity:
• Environmental conditions (heat, humidity)
• Electrical surges
• Quality of the part
• Proper installation

• Budget: $50 - $150
• Mid-range: $150 - $300
• Premium: $300+

• Labor cost: $100 - $300 (if professionally installed)
• Total job cost: $150 - $600+

• Known issues:
• Some models have issues with water intrusion affecting the immobilizer module. Check for leaks around the windshield or sunroof.
• Certain models are known to have issues with the key transponder losing its programming, causing the immobilizer to activate.

• TSBs or common complaints:
• Check online forums and technical service bulletins (TSBs) for any known issues related to your specific vehicle model and year.

• How to confirm proper operation:
• Start the car and let it run for a few minutes.
• Make sure the security light turns off after starting the car.
• Test the remote key fob to make sure it locks and unlocks the doors.

• What to look/listen for:
• The car starts smoothly and runs without stalling.
• No warning lights related to the immobilizer system are illuminated.
• The remote key fob works properly.

Q: Will this module need to be programmed to my car? A: Yes, it's very likely that the module will need to be programmed to your specific vehicle after installation. This often requires a specialized diagnostic tool.

Q: Can I install this part myself? A: You can, if you have some mechanical experience. However, programming the module usually requires a professional.

Q: What happens if I don't program the module? A: The car will likely not start. The immobilizer system is designed to prevent the car from starting if the module is not properly programmed to the vehicle's key and computer.

Q: How can I find a mechanic who can program this module? A: Search online for mechanics in your area who specialize in BMW or Land Rover vehicles, or who have experience with immobilizer systems.

Q: What if the new module doesn't fix the problem? A: There could be other issues with the immobilizer system, such as a faulty key transponder, wiring problems, or a problem with the car's computer. A professional mechanic can diagnose the problem further.

OEM Part Numbers:

• BMW: 61354101593, 61356901253, 61356912145, 61356942691, 61358369482, 61358384678, 61359395662
• Land Rover: YWC000493, YWC000550, YWC000551

Fits Years: 2003 2004 2005 2006 2007 2008