89661-5C310 / 212000-1510 Toyota Sienta Engine Control Unit ECU Genuine OEM.

Description:
The Toyota Sienta Engine Control Unit (ECU) with part numbers 89661-5C310 and 212000-1510 is a genuine OEM module designed to manage and optimize the engine’s performance. It regulates fuel injection, ignition timing, air–fuel ratio, and emissions, ensuring smooth driving, fuel efficiency, and compliance with Toyota factory standards.

If this ECU fails, symptoms may include poor fuel economy, difficulty starting, stalling, or the check engine light appearing on the dashboard. Replacing it with the correct OEM ECU restores proper communication between the engine and vehicle systems, ensuring reliable operation.

Compatibility Table:

Make	Model	Year Range	Engine Type	Notes
Toyota	Sienta	2003–2010	Petrol	Fits select trims – confirm part number & VIN before purchase

Compatibility Table:

Make	Model	Year Range	Engine Type	Notes
Toyota	Sienta	2003–2010	Petrol	Fits select trims – confirm part number & VIN before purchase

Shipping, returns and warranty

Worldwide shipping with tracking
30-day returns on unused, uninstalled parts
90-day limited warranty against defects

Send us your VIN and we confirm fitment before shipping. See our shipping policy and return policy.

89661-5C310

89661-5C310 Toyota Sienta Engine Control Unit ECU 2120001510 Genuine OEM