Yamaha BW4-H5540-20-00 - CDI Unit Assembly is a genuine Yamaha part. It replaces a failed electronic control unit with the specified Yamaha part. Match part number BW4-H5540-20-00 to the Yamaha parts diagram for your model to confirm it is the component you need.

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Key Features & Benefits

• Replaces a failed or damaged control unit.
• Connects to the factory wiring harness for its location.
• Processes sensor inputs and controls the system it manages.
• Sold under Yamaha part number BW4-H5540-20-00.

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Frequently Asked Questions

What is Yamaha part BW4-H5540-20-00?

BW4-H5540-20-00 is the Yamaha part number for the CDI Unit Assembly, a genuine Yamaha part. It is an electronic control unit that manages system functions using input from sensors.

Should I diagnose before replacing the CDI Unit Assembly (BW4-H5540-20-00)?

Yes. Control unit symptoms can be caused by wiring, sensors, or power supply issues. Confirm the fault with testing before installing part BW4-H5540-20-00.

What does the CDI Unit Assembly (BW4-H5540-20-00) control?

The CDI Unit Assembly manages the system it is wired into, using inputs from related sensors, as shown for part BW4-H5540-20-00 in the Yamaha parts diagram.

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WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.