Yamaha 66E-85540-00-00 CDI Unit Assembly is a genuine Yamaha electronic control component. It is designed for the factory engine or vehicle control system on compatible models. It is listed for 4 Yamaha model and model-year applications spanning model years 1998–2005.

Key Features

• Purpose: Replaces a control unit when service information identifies it as the required part.
• Design: Control modules can be highly application-specific.
• Fitment: Specified for 4 Yamaha model and model-year applications, listed in the compatibility section below.
• Part Number: Sold as genuine Yamaha part number 66E-85540-00-00.

Engine & Boat Compatibility

• GP800 WaveRunner GP800 (1998-2000)
• GP800A WaveRunner GP800R (2001-2005)
• XA800 WaveRunner XL800 (2000-2001)
• XA800A WaveRunner XLT800 (2002-2004)

Performance & Real-World Benefits

When diagnosis identifies the control unit as the fault, installing the application-specific module restores the factory control system.

Why Choose Yamaha OEM

Control modules are highly application-specific, so matching the exact Yamaha part number, model, and model year avoids incompatible substitutions.

FAQ

Q1: Is 66E-85540-00-00 a genuine Yamaha OEM part?

Yes. This listing is for genuine Yamaha part number 66E-85540-00-00, intended for the applications listed in the compatibility section.

Q2: Which Yamaha models does this CDI unit assembly fit?

It fits the GP800 WaveRunner GP800 (1998-2000), GP800A WaveRunner GP800R (2001-2005), XA800 WaveRunner XL800 (2000-2001), and XA800A WaveRunner XLT800 (2002-2004).

Q3: Does this control unit require programming or setup?

Programming, initialization, or calibration requirements can vary by model. Check the applicable Yamaha service information before installation and replacement.

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.