Yamaha B5R-8591A-21-00 - Engine Control Unit is a genuine Yamaha part. This control unit processes signals and controls the system it is part of. Use part number B5R-8591A-21-00 to confirm it matches the component shown in your model's Yamaha parts diagram.

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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 B5R-8591A-21-00.

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Frequently Asked Questions

What is the Yamaha Engine Control Unit (B5R-8591A-21-00)?

The Engine Control Unit is a genuine Yamaha part sold under part number B5R-8591A-21-00. It replaces a failed electronic control unit with the specified Yamaha part.

Should I diagnose before replacing the Engine Control Unit (B5R-8591A-21-00)?

Yes. Control unit symptoms can be caused by wiring, sensors, or power supply issues. Confirm the fault with testing before installing part B5R-8591A-21-00.

How do I confirm B5R-8591A-21-00 fits my Yamaha?

Model fitment is not listed for part B5R-8591A-21-00 on this page. Compare the part number against the Yamaha parts diagram for your model and year, or confirm with a Yamaha dealer using your model or VIN before ordering.

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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.