
8631A878 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $123.19 | Top Pick! Condition is Used, Engine ECM 2.4L Automatic Coupe US Market Fits 10-11 Mitsubishi Eclipse OEMl, FREE SHIPPING | 99.2% |
![]() | $170.00 | Top Pick! Condition is Used, 8631A878 ecm ecu computer 2011 Mitsubishi Eclipse, FREE SHIPPING | 99.9% |
![]() | $299.99 | Condition is Used, 10-11 MITSUBISHI ECLIPSE COUPE 2.4L ECU ECM ENGINE MODULE COMPUTER 8631A878 OEM, FREE SHIPPING | 99.8% |

The Mitsubishi 8631A878 is a 10-11 Eclipse 2.4L ECU (Electronic Control Unit) or ECM (Engine Control Module) specifically designed for Mitsubishi Eclipse models produced between 2010 and 2011. This ECU is an essential component of your vehicle's engine management system, as it communicates with other sensors to ensure optimal engine performance.
This 2.4L ECU features advanced microprocessor technology for swift and precise fuel injection, ignition timing, and engine control adjustments. Its design is focused on enhancing fuel efficiency while maintaining strong engine power and responsiveness. The ECU continuously monitors various engine parameters, including engine temperature, air intake, throttle position, and exhaust gas oxygen levels, to ensure a balanced engine output.
The Mitsubishi 8631A878 ECU includes a wide range of onboard diagnostics, which can help you identify any potential engine issues and troubleshoot them effectively. This can save you time and money by allowing you to address problems before they escalate into costly repairs.
The ECU is also equipped with adaptive learning capabilities, which enables it to learn the driving habits of the vehicle's owner and adjust engine performance accordingly. This results in a more personalized and efficient driving experience.
This ECU comes with a durable, compact design, ensuring it fits seamlessly into your Eclipse's engine compartment. It is also designed to work with the vehicle's wiring harness, making installation straightforward and hassle-free.
In summary, the Mitsubishi 8631A878 10-11 Eclipse 2.4L ECU is a crucial component for maintaining optimal engine performance and fuel efficiency in your Mitsubishi Eclipse. Its advanced features, quick processing capabilities, and user-friendly design make it an excellent choice for any Mitsubishi Eclipse owner looking to enhance their vehicle's performance and overall driving experience.
The Mitsubishi 8631A878 10-11 Eclipse 2.4L ECU (Electronic Control Unit) is a crucial part of the engine management system in certain Mitsubishi Eclipse models from the 10-11 generation with a 2.4-liter engine. Replacing a faulty or malfunctioning ECU can help improve engine performance, enhance fuel efficiency, and ensure proper emissions compliance. However, before making a decision to purchase this part, it's essential to weigh its advantages and disadvantages.
Pros:1. Improved Engine Performance: A new ECU can help optimize engine functions, such as fuel injection, ignition timing, and emission control. This can lead to improved engine performance, increased power, and smoother operation.
2. Enhanced Fuel Efficiency: By optimizing engine functions, a new ECU can help improve fuel efficiency. This can result in cost savings on fuel and reduced greenhouse gas emissions.
3. Enhanced Driveability: A new ECU can help improve overall driveability, including acceleration, throttle response, and engine idling. This can lead to a more enjoyable driving experience.
4. Diagnostic Capabilities: Modern ECUs come with diagnostic capabilities, which can help identify and troubleshoot engine issues. This can save time and money on diagnostic testing and repair costs.
5. Compliance with Emissions Regulations: A new ECU can help ensure that the vehicle is compliant with emissions regulations. This can help avoid costly fines and the need for costly modifications to meet emissions standards.
Cons:1. Cost: The cost of a new ECU can be high, especially for aftermarket parts. This can be a significant investment for some vehicle owners.
2. Installation Complexity: Installing a new ECU can be a complex process, requiring advanced technical knowledge and specialized tools. This can be time-consuming and expensive, especially for those without the necessary expertise.
3. Risk of Damaging Other Components: During the installation process, there is a risk of damaging other components in the vehicle, such as wiring or sensors. This can lead to additional repair costs and downtime.
4. Potential for Compatibility Issues: Some aftermarket ECUs may not be fully compatible with the vehicle's engine management system. This can lead to unexpected issues and the need for additional modifications or adjustments.
Conclusion:The decision to purchase a new Mitsubishi 8631A878 10-11 Eclipse 2.4L ECU depends on several factors, including the current condition of the vehicle's ECU, the desired driving experience, and the budget for the repair. If the vehicle's ECU is causing significant engine performance issues, or if the vehicle is no longer compliant with emissions regulations, then replacing the ECU may be a worthwhile investment. However, if the ECU is functioning correctly, or if the cost and complexity of the installation outweigh the potential benefits, then it may be best to consider other repair options or to hold off on the investment. Ultimately, it's essential to carefully weigh the pros and cons of purchasing a new ECU and to consult with a qualified mechanic or automotive technician before making a decision.
Recommendation:If you have determined that replacing the ECU is the best option for your vehicle, then it's essential to ensure that you purchase a high-quality, genuine replacement part from a reputable supplier. This can help minimize the risk of compatibility issues and ensure optimal engine performance. Additionally, it's recommended to have the installation performed by a qualified mechanic or automotive technician to minimize the risk of damage to other components and to ensure proper installation and calibration of the new ECU.
Details:
Removed from 2011 Mitsubishi Eclipse 2.4l. 10-11 Mitsubishi Eclipse coupe 2.4l ecu ecm engine module computer 8631A878 oem. May require programming engine control. Eclipse 10-11 electronic control module; LHS inner fender mounted, 2.4l, at, coupe, us market.
specifications perfoelectric:
- for models: Eclipse
- for years: 2010–2011
- brand: Mitsubishi
- mpn: 8631a878
- part type: Ecm Ecu Engine Module
- manufacturer warranty: 30 Days
- fitment type: Direct Replacement
- tag: 730952
- placement on vehicle: Front
- country of origin: United States
offer perfoelectric:
- best offers: true
- sold #: 8
- options: ship-to-home
- prices: $123.19–$299.99
- item condition: Used
- started: may 1, 2026
- availability: in stock
- in stock #: 3
shipping perfoelectric:
- transit: 3-5 days
- type: fixed
- class: standard
- service: standard
seller perfoelectric:
- rating: 99.7%
- # reviews: 26188
- city: east saint louis, illinois
returns perfoelectric:
- time: 30 days
- policy: returns accepted
- paid by: buyer
general perfoelectric:
- category: Auto Parts > Electrical Components
payments perfoelectric:
- credit card: discover
- other
- wallet: paypal
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