Daihatsu Granmax Genuine Computer Engine Control Unit (ECU) 89560-BY400

The Daihatsu Granmax Genuine Computer Engine Control Unit (ECU) (Part Number: 89560-BY400) is an original OEM electronic control module designed to ensure precise fuel injection, efficient combustion, and optimal engine performance. Manufactured by Daihatsu Motor Co., Ltd. and developed in collaboration with DENSO, this ECU delivers factory-level reliability, accuracy, and long-term durability for your Granmax engine system.

Built under strict Japanese engineering standards and produced in Indonesia, this genuine Daihatsu ECU uses advanced microprocessor technology to manage air-fuel ratios, ignition timing, and idle control — ensuring your vehicle runs smoothly, economically, and reliably in all driving conditions. Perfect for both engine restoration and electronic system replacement, it restores your vehicle’s original performance with full OEM calibration.

Key Features

• 100% Genuine Daihatsu OEM Part — Developed and tested by Daihatsu Motor Co., Ltd. for the Granmax series.
• Part Number: 89560-BY400 — Ensures direct compatibility and plug-and-play installation without modification.
• Precision Fuel Control — Accurately manages fuel injection timing for improved combustion and fuel economy.
• DENSO Engineered Technology — Uses advanced circuitry and microchip systems for consistent and stable performance.
• Made in Indonesia — Produced under Daihatsu’s global OEM standards ensuring top-tier quality and reliability.

Advantages

• Restores Factory Engine Performance — Optimizes ignition timing, fuel mapping, and idle speed for smooth acceleration and stable idling.
• Improves Fuel Efficiency — Reduces unnecessary fuel consumption through accurate ECU calibration.
• Enhances Emission Control — Ensures your vehicle meets OEM emission standards and maintains environmental compliance.
• Long-Term Reliability — Designed for extended service life even in high-temperature tropical environments.

Benefits

• Enjoy smoother engine performance and instant throttle response.
• Save fuel and reduce emissions with factory-calibrated precision.
• Prevent costly engine issues caused by faulty aftermarket ECUs or inaccurate tuning.
• Drive confidently knowing your vehicle is powered by a genuine, tested, and certified Daihatsu ECU.

Applications

Compatible with the following vehicle models:

• Daihatsu Granmax 1.3L / 1.5L (Petrol) — Van & Pickup variants.
• Suitable for models equipped with DENSO EFI fuel injection systems.
• Direct replacement for the original ECU 89560-BY400 unit without wiring modification.

Ideal for engine control restoration, troubleshooting idle or ignition issues, or full ECU replacement during major service.

Frequently Asked Questions (FAQ)