2003 - 2008 BMW Z4 Immobilizer Control Module (OEM)

When buying an Immobilizer Control Module, here's what to look for:

• Make sure the part is compatible with your car's year, make, and model. While this page doesn't list compatibility, it's crucial to verify before purchasing.
• Check the part's condition. If buying a used part, look for signs of damage or corrosion.
• Ask about the seller's return policy.
• Confirm the part has been tested and is guaranteed to work.

Quality indicators for available options:

• Used OEM: Look for parts that have been tested and inspected. Ask about the testing process.
• New Aftermarket: Check the brand reputation and read reviews. Look for parts that meet or exceed OE specifications.

Typically, the Immobilizer Control Module is the only item included when you purchase it. You may need to reuse existing hardware or purchase new hardware separately.

The difficulty level of installing an Immobilizer Control Module is generally considered medium to high. Estimated time can range from 1 to 3 hours, depending on your experience and the car's accessibility.

Special tools that may be needed:

• Basic hand tools (sockets, wrenches, screwdrivers)
• Diagnostic scanner to clear error codes and potentially program the new module.

Critical steps and tips:

1. Disconnect the car battery before starting any work.
2. Locate the Immobilizer Control Module (refer to your car's service manual).
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 diagnostic scanner to clear any error codes and program the new module if necessary.

Whether DIY is recommended or professional installation is better depends on your experience and comfort level. If you are not comfortable working with electrical systems or using a diagnostic scanner, it is best to have a professional install the part. Improper installation can damage the module or other components.

Let's compare your buying options:

• Used OEM: These are genuine factory parts that have been removed from other vehicles. They are typically tested and inspected to ensure they are in good working condition. Used OEM parts offer excellent value because they are significantly cheaper than new parts while still providing the quality and reliability of a factory part.

• New Aftermarket: These are brand-new parts manufactured by third-party companies. They are designed to meet or exceed the original equipment specifications. New aftermarket parts can be a good option if you want a new part at a lower price than a new OEM part.

Parts that are commonly replaced or checked at the same time as the Immobilizer Control Module include:

• Key Transponder: If the key transponder is faulty, it can prevent the car from starting, even with a working Immobilizer Control Module.
• Wiring Harness: Damaged or corroded wiring can cause problems with the immobilizer system.
• Engine Control Unit (ECU): In some cases, a faulty ECU can interfere with the immobilizer system.

Replacing related parts can prevent repeat failures by addressing underlying issues that may have contributed to the original problem. For example, if a wiring problem caused the Immobilizer Control Module to fail, replacing the module without fixing the wiring problem could lead to another failure.

The typical lifespan of an Immobilizer Control Module can vary, but they often last for 10-15 years or more.

Factors that affect longevity:

• Environmental conditions: Exposure to extreme temperatures, moisture, or vibration can shorten the lifespan of the module.
• Electrical surges: Voltage spikes can damage the internal components of the module.
• Quality of the part: A higher-quality module is likely to last longer than a lower-quality module.

Here are typical price ranges for Immobilizer Control Modules:

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

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: $150 - $450
• New Aftermarket: $200 - $600

Some vehicles may have known issues with their immobilizer systems. Research your specific vehicle model to see if there are any Technical Service Bulletins (TSBs) or common complaints related to the immobilizer system. This information can help you diagnose the problem and choose the right solution.

After installing the Immobilizer Control Module, here's how to confirm proper operation:

• Start the car and make sure it runs smoothly.
• Check that the security light on the dashboard turns off after the car starts.
• Drive the car for a short distance to make sure there are no stalling or starting problems.
• Use a diagnostic scanner to check for any error codes related to the immobilizer system.

If the car starts and runs without any problems, and there are no error codes, the Immobilizer Control Module is likely working correctly.

Q: Will this Immobilizer Control Module need to be programmed to my car?
A: It depends. Some modules are plug-and-play, while others require programming to match your car's specific security system. Check with the seller or a mechanic to confirm whether programming is necessary.

Q: What happens if I install the module incorrectly?
A: Incorrect installation can damage the module or other components in your car's electrical system. It's best to have a professional install the module if you're not comfortable working with electrical systems.

Q: How do I know if the Immobilizer Control Module is the problem and not something else?
A: A mechanic can use a diagnostic scanner to check for error codes related to the immobilizer system. They can also check the wiring and connections to the module to make sure everything is properly connected. It's important to rule out other possibilities before replacing the module.

Q: Are used Immobilizer Control Modules reliable?
A: Used OEM modules can be a reliable and cost-effective option. Look for parts that have been tested and inspected to ensure they are in good working condition.

OEM Part Numbers:

• BMW: 61350143843, 61354100187, 61354100188, 61356905669, 61356905670, 61358380369, 61358382455, 61359145097

Fits Years: 2003 2004 2005 2006 2007 2008